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Best Selling Genuine Replacement Thermostats

  • Constantly Updated Inventory of Replacement Thermostat Parts
  • We stock Discount Thermostat OEM Parts
Mahle
2003 Audi TT Engine Coolant Thermostat Mahle - (87C-102C) Behr

P311-4FDD3B9    W0133-1638227  New

Qty:
$15.44
Mahle Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • (87C-102C) Behr
Brand: Mahle
Additional Fitment Information:
Vehicle
2003 - Audi TT
Mahle
2003 Volkswagen Jetta Engine Coolant Thermostat 4 Cyl 1.8L Mahle - (87C-102C) Behr

P311-4FDD3B9    W0133-1638227  New

Qty:
$15.44
Mahle Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • ; with 87°C/102°C
  • (87C-102C) Behr
Brand: Mahle
Additional Fitment Information:
Vehicle Block Engine CID CC
2003 - Volkswagen Jetta L 4 Cyl 1.8L - 1781
Calorstat
2001 BMW 320i Engine Coolant Thermostat Calorstat - with Housing & Seal

P311-1BE1782    W0133-1662661  New

Qty:
$90.33
Calorstat Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • With Housing and Seal
  • with Housing & Seal
  • W/ Housing
Brand: Calorstat
Additional Fitment Information:
Vehicle
2001 - BMW 320i
Calorstat
2005 BMW 320i Engine Coolant Thermostat Calorstat - with Housing & Seal

P311-1BE1782    W0133-1662661  New

Qty:
$90.33
Calorstat Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • with Housing & Seal
Brand: Calorstat
Additional Fitment Information:
Vehicle
2005 - BMW 320i
Calorstat
1998 BMW Z3 Engine Coolant Thermostat 6 Cyl 2.8L Calorstat - with Housing & Seal

P311-1BE1782    W0133-1662661  New

Qty:
$90.33
Calorstat Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • ; Production: 09/01/1998-
  • with Housing & Seal
Brand: Calorstat
Additional Fitment Information:
Vehicle Block Engine CID CC Prod. Date Range
1998 - BMW Z3 L 6 Cyl 2.8L - 2793 Fr:09-01-98
ACDelco
2004 Chevrolet Blazer Engine Coolant Thermostat ACDelco

P311-5123BC4    W0133-1972134  New

Qty:
$33.08
ACDelco Engine Coolant Thermostat
  • Gold (Professional)
Brand: ACDelco
Additional Fitment Information:
Vehicle
2004 - Chevrolet Blazer
ACDelco
1996 Chevrolet Express 2500 Engine Coolant Thermostat 8 Cyl 5.7L ACDelco

P311-5123BC4    W0133-1972134  New

Qty:
$33.08
ACDelco Engine Coolant Thermostat
  • Gold (Professional)
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
1996 - Chevrolet Express 2500 V 8 Cyl 5.7L 350 -
ACDelco
2000 Chevrolet Express 1500 Engine Coolant Thermostat ACDelco

P311-5123BC4    W0133-1972134  New

Qty:
$33.08
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
Brand: ACDelco
Additional Fitment Information:
Vehicle
2000 - Chevrolet Express 1500
ACDelco
1996 GMC P3500 Engine Coolant Thermostat 8 Cyl 5.7L ACDelco

P311-5123BC4    W0133-1972134  New

Qty:
$33.08
ACDelco Engine Coolant Thermostat
  • Gold (Professional)
  • ; with RPO L31
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
1996 - GMC P3500 V 8 Cyl 5.7L 350 -
ACDelco
1996 GMC P3500 Engine Coolant Thermostat 8 Cyl 5.7L ACDelco

P311-5123BC4    W0133-1972134  New

Qty:
$33.08
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • ; with RPO L31
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
1996 - GMC P3500 V 8 Cyl 5.7L 350 -
ACDelco
1996 GMC P3500 Engine Coolant Thermostat 8 Cyl 5.7L ACDelco

P311-5123BC4    W0133-1972134  New

Qty:
$33.08
ACDelco Engine Coolant Thermostat
  • Gold (Professional)
  • ; with RPO L31
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
1996 - GMC P3500 V 8 Cyl 5.7L 350 -
ACDelco
2016 Chevrolet Sonic Engine Coolant Thermostat 4 Cyl 1.4L ACDelco

P311-2D4941A    W0133-2911009  New

Qty:
$111.23
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • Includes Coolant Outlet Housing, O-Ring, and Sensor
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2016 - Chevrolet Sonic L 4 Cyl 1.4L 83 1364
Calorstat
2007 Hyundai Azera Engine Coolant Thermostat Calorstat

P311-0AABE39    W0133-1825379  New

Qty:
$25.44
Calorstat Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Calorstat
Additional Fitment Information:
Vehicle
2007 - Hyundai Azera
Calorstat
2009 Kia Borrego Engine Coolant Thermostat 6 Cyl 3.8L Calorstat

P311-0AABE39    W0133-1825379  New

Qty:
$25.44
Calorstat Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • ; Production: -05/29/2008
Brand: Calorstat
Additional Fitment Information:
Vehicle Block Engine CID CC Prod. Date Range
2009 - Kia Borrego V 6 Cyl 3.8L 231 3778 To:05-29-08
Calorstat
2005 Mercedes-Benz SLK350 Engine Coolant Thermostat Calorstat

P311-1C63AE3    W0133-1953845  New

Qty:
$156.04
Calorstat Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • ; Eng: 30 058634-
  • Includes Coolant Outlet Housing and Seal
Brand: Calorstat
Additional Fitment Information:
Vehicle Engine Range
2005 - Mercedes-Benz SLK350 30 058634 and up
Calorstat
2011 Mercedes-Benz C300 Engine Coolant Thermostat Calorstat

P311-1C63AE3    W0133-1953845  New

Qty:
$156.04
Calorstat Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
Brand: Calorstat
Additional Fitment Information:
Vehicle
2011 - Mercedes-Benz C300
Calorstat
2006 Mercedes-Benz R350 Engine Coolant Thermostat Calorstat

P311-1C63AE3    W0133-1953845  New

Qty:
$156.04
Calorstat Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • ; Eng: 30 058634-
Brand: Calorstat
Additional Fitment Information:
Vehicle Engine Range
2006 - Mercedes-Benz R350 30 058634 and up
ACDelco
2008 Chevrolet Suburban 2500 Engine Coolant Thermostat ACDelco

P311-0277E91    W0133-1821992  New

Qty:
$75.42
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
Brand: ACDelco
Additional Fitment Information:
Vehicle
2008 - Chevrolet Suburban 2500
ACDelco
2007 Chevrolet Avalanche Engine Coolant Thermostat ACDelco

P311-0277E91    W0133-1821992  New

Qty:
$75.42
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
Brand: ACDelco
Additional Fitment Information:
Vehicle
2007 - Chevrolet Avalanche
ACDelco
2007 Chevrolet Silverado 1500 Engine Coolant Thermostat 8 Cyl 5.3L ACDelco

P311-0277E91    W0133-1821992  New

Qty:
$75.42
ACDelco Engine Coolant Thermostat
  • This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
  • Genuine GM
  • ; w/o Housing
Brand: ACDelco
Additional Fitment Information:
Vehicle Block Engine CID CC
2007 - Chevrolet Silverado 1500 V 8 Cyl 5.3L 325 5328

Latest Thermostat Repair and Installation Advice

CarJunky AutoAdvice

thermostat question

Showing 8 out of 30 Posts | Show 22 Hidden Posts
Question From zoggnoff on thermostat question

is it okay to replace a 190 degree thermostat with a 170 degree thermostat?

Response From Sidom

On the computer controlled cars it's really not a good idea. The vehicle needs a minimum temp of 195° to run properly. On the OBD II cars running a 170° t stat could actually set a code.

The thing about t stats that some people get backwards is, all it controls is the minimum running tempature not the maximum. If you have a problem with your car running hot, a cooler t stat won't fix that problem. a 195° t stat will close if the coolant temp while running, drops below 195°, once past that it opens back up & coolant flow thru the rad again. So a 170° t stat would let the temp get all the way down to 170° before it closed & restricted coolant flow. Even non-computer controlled cars, thats too cool. Sludge cool build, MPG could go down. On a warm day, its really a non issuse (unless of course it sticks & thats a whole different story) because wheither you have a 195 or 170, the coolant problably isn't going to get close to minimum tempatures for the stat to close.

So where I'm at during the summer, once my stat opens....it's open for the rest of the day

Response From zoggnoff

I had a problem with the thermostat, it was stuck closed.
I went to pepboys and they had 2 available, 170 and 180... book said it should be 190
installed the 170 t stat few days before posting this thread (woops), guy behind the counter seemed to think it was a great idea.. ehh
well, live in Florida, damn thing gets way hot sometimes ya know.

It was a real pain in the ass because i was removing the wrong pieces and somehow pulled out the gasket on the metal part that connects to the upper hose, couldn't get the damn thing back in so i just tightened up without the gasket... hasn't leaked so far. then i found the t stat housing underneath all these wires that connected to the LOWER hose.

the book really left a lot out in the steps and made it seem like the UPPER house was where the housing should be. beginning to hate this book.
is there a better manual than haynes for an 03 eclipse 3.0L?
also how serious could 20 degrees be? should i change that ASAP? pepboys didn't even have a 190

Response From Loren Champlain Sr

All the guys are correct here. Only thing I have to offer is, Nearly all of the manuals other than Haynes are better. Motors, Mitchell, Chilton (my least favorite next to Haynes). Your public library is usually a good source as well.

Response From zoggnoff

Thanks for the tip.
I was able to locate a Factory Service Manual for 3g Eclipse and Eclipse Spyder.
All in all some 3 or 4 thousand pages.

Best part is all PDF Document and free download :)

Response From Loren Champlain Sr Top Rated Answer

Ain't the internet great?

Response From GlennAB1

The thermostat's main purpose is to reduce engine wear. Most engine wear happens during start and warm up. If you install a lower temp thermostat (or remove the thermostat alltogether) you increase warm up time and reduce engine life.

Haynes Manuals are so generic...... throw them away and don't buy another.

Response From Sidom

Just to keep things straight.... The main purpose of a T stat is to maintain a minium engine operating tempature. Some of the points you make are valid but a T stat is going to have no affect what soever on a cold soak start....

I agree with you on Haynes...........

Response From GlennAB1


Just to keep things straight.... The main purpose of a T stat is to maintain a minium engine operating tempature. Some of the points you make are valid but a T stat is going to have no affect what soever on a cold soak start....

I agree with you on Haynes...........


On a cold soak start...... there's really nothing we can do to reduce wear then, except run the best oil (like AMSOIL), run at low RPM/don't drive till temp is off the peg.

Quickly reaching and maintianing minimum engine operating temperature is for what reason?

Response From Sidom


Quickly reaching and maintianing minimum engine operating temperature is for what reason?
Whole slew of reasons Glenn, from drivability, fuel economy, emissions, owner comfort and yes you can throw engine wear in there as ONE of the many reasons that the main purpose of a thermostat is to maintain minium operating tempature of an engine.

Response From GlennAB1



Glenn: Quickly reaching and maintianing minimum engine operating temperature is for what reason?
Sidom: Whole slew of reasons Glenn, from drivability, fuel economy, emissions, owner comfort and yes you can throw engine wear in there as ONE of the many reasons that the main purpose of a thermostat is to maintain minium operating tempature of an engine.

Response From Hammer Time

Argue with Sidom on that one. I just listed that for his sake.


You need to give up while your only a few miles behind.

Response From GlennAB1

I guess it's by accident that just about everything I've read lists "reduce engine wear" first when listing what the thermostat is for.




Sig removed

Response From GlennAB1



Quickly reaching and maintianing minimum engine operating temperature is for what reason?
Whole slew of reasons Glenn, from drivability, fuel economy, emissions, owner comfort and yes you can throw engine wear in there as ONE of the many reasons that the main purpose of a thermostat is to maintain minium operating tempature of an engine.



Being a mechanic, I have to place engine wear at the top of the list....... Owner comfort: yeah, I like it to warm up fast in the Winter. Emissions: Not concerned about that with my '66. Fuel Economy: Sure we want it to warm up fast so the idle kicks down, but if we're driving it right away there's not much fuel economy difference. Drivability...... hmmmm, got me there.

Response From Hammer Time

The thermostat's main purpose is to reduce engine wear. Most engine wear happens during start and warm up. If you install a lower temp thermostat (or remove the thermostat alltogether) you increase warm up time and reduce engine life.

That is pure nonsense

The engine needs to maintain a minimum temp for complete combustion and complete vaporization of the fuel mixture. If you run an engine too cold, you can do serious long term damages and running a car without a thermostat causes the engine to lose all control of temperature and should never be done

Response From GlennAB1



The thermostat's main purpose is to reduce engine wear. Most engine wear happens during start and warm up. If you install a lower temp thermostat (or remove the thermostat alltogether) you increase warm up time and reduce engine life.

That is pure nonsense

The engine needs to maintain a minimum temp for complete combustion and complete vaporization of the fuel mixture. If you run an engine too cold, you can do serious long term damages and running a car without a thermostat causes the engine to lose all control of temperature and should never be done


Your response doesn't make any sense...... Maybe you didn't comprehend what I wrote?

Response From Sidom




The thermostat's main purpose is to reduce engine wear. Most engine wear happens during start and warm up. If you install a lower temp thermostat (or remove the thermostat alltogether) you increase warm up time and reduce engine life.

That is pure nonsense

The engine needs to maintain a minimum temp for complete combustion and complete vaporization of the fuel mixture. If you run an engine too cold, you can do serious long term damages and running a car without a thermostat causes the engine to lose all control of temperature and should never be done

Your response doesn't make any sense...... Maybe you didn't comprehend what I wrote?


You know we're really not accomplishing anything here anymore Glenn... HT's response is crystal clear and makes perfect sense.....

This is auto shop 101 and if you wanna go thru life believing the main purpose in a T stats life is to reduce engine wear, you go with it bro...... and when your get this as the million dollar question, you stick to guns & giv'em your answer........just hope I'm watching...

Time to end this one.....we're just wasting bandwidth now.......

Response From GlennAB1

I was merely pointing out a fact (engine 101) that you guys hadn't mentioned.
Anyone can GOOGLE: thermostat and engine wear and see if I'm full of sh!t.
Sorry!

Response From Loren Champlain Sr

>>We don't need Google for that.......... << HT is right. We don't need Google for that. You made that obvious. You may know about airplanes, but.... I know nothing about jet engines, so, I don't profess to know... Just a hint. I do know about internal combustion engines, though.

Response From GlennAB1


>>We don't need Google for that.......... << HT is right. We don't need Google for that. You made that obvious. You may know about airplanes, but.... I know nothing about jet engines, so, I don't profess to know... Just a hint. I do know about internal combustion engines, though.

I was done with this.....

Initially, the thermostat is there so the engine heats up to it operating temperature as quickly as possible, in order to reduce engine wear. If there weren't a thermostat the engine would wear out quickly and there wouldn't be any concern about "fuel economy, emissions, and owner comfort," which, yes the thermostat is also there for.

Yes, I'm educated in gas turbine (jet) engines, but also gas piston engines...... both being internal combustion engines.

Response From Loren Champlain Sr

No, thermostats were'nt invented for creature comfort. They were designed just for what they are...to keep engine temps even. Initially, for fuel vaporization. Many engines had thermostats before heaters were introduced.

Response From GlennAB1


No, thermostats were'nt invented for creature comfort. They were designed just for what they are...to keep engine temps even. Initially, for fuel vaporization. Many engines had thermostats before heaters were introduced.

Argue with Sidom on that one. I just listed that for his sake.




Sig removed

Response From Loren Champlain Sr

Read Sidom's responce. He was correct. What's your point?

Response From Hammer Time

We don't need Google for that..........

Response From Tom Greenleaf

Change it to correct one ASAP. Open t-stat is open whether a cooler rated one or not. It does nothing but confuse the car to alter that. If running too hot then there's a problem to fix,

T

Response From trw

i have to agree as well with the rest of you all
running a cooler thermostat really not the way to go
on a cumputer controlled car because not only will
the onboard computer be fooled into thinking that
the engine needs more fuel because it thinks its still

at a warm up cycle and you could have a slight increase
in rpms as well because again it thinks it needs more
fuel but you could also create other problems like oil sludging
related from a too cooller running engine so definatly
stay with oem settings

Response From Hammer Time

i have to agree as well with the rest of you all
running a cooler thermostat really not the way to go
on a cumputer controlled car because not only will
the onboard computer be fooled into thinking that
the engine needs more fuel because it thinks its still

at a warm up cycle and you could have a slight increase
in rpms as well because again it thinks it needs more
fuel but you could also create other problems like oil sludging
related from a too cooller running engine so definatly
stay with oem settings


No, that's not true at all. The computer won't be fooled because the coolant temp sensor is still reporting accurately and the computer will respond correctly for the actual temp of the engine. The problem is that the computer requires a minimum temp before it switches to closed loop so it continues to ignore some of the sensors and the cooler engine won't burn the fuel properly.

Response From Tom Greenleaf

In short - use the temp rating that was OE in cars. Few if any benefit from lowering a t-stats opening temp. If vehicle is or has an overheating problem that's a separate issue............and lowering t-stats wide open range won't change or fix that!

T

Response From Hammer Time

I totally agree with Sidom.
If your in a state that has emissions inspections, that lower thermostat can cause you to fail because the computer will remain in open loop status.

Response From Tom Greenleaf

Agree, agree! Lowering rating of a thermostat is a bad idea. Whether a 160 or 195F they are both open the same at the 195 which is NOT too much for an engine. There were engineered engines to run at 160 (never heard of 170 posted?) but only saw that for marine use - no computer controls and engines under stresses a car would never see,

T

Thermostat replacement on 97 Olds Cutlass

Showing 2 out of 6 Posts | Show 4 Hidden Posts
Question From smcvey on Thermostat replacement on 97 Olds Cutlass

I need to replace the thermostat on my daughter's 97 Cutlass. I don't have any idea where the thermostat is in this car. Is there a website that might have a labeled engine diagram?

Response From Hammer Time

Is it a Cutlass or a Cutless Supreme?

What engine does it have.

Response From smcvey

Supreme with a V6

Response From Hammer Time

Both engine options are V6's but the thermostats for both of them is in the same general area. Follow the upper radiator hose back and it ends at the thermostat housing. It's on the driver's side, below the intake manifold.

Response From mpkell Top Rated Answer

Where is the thermostat located? The top radiator hose connects to a metal pipe...the view of that part's connection to the engine block is blocked by other engine parts. Is the thermostat located at that connection? If so how is the thermostat exchange accomplished?

Response From Hammer Time

You need to read the FORUM RULES before posting. This thread is 3 years old.

97 olds cutlass supreme thermostat

Showing 3 out of 9 Posts | Show 6 Hidden Posts
Question From mpkell on 97 olds cutlass supreme thermostat

How to locate and change 97 olds cutlass supreme thermostat?

Response From mpkell

Where is the thermostat located? The top radiator hose connects to a metal pipe...the view of that part's connection to the engine block is blocked by other engine parts. Is the thermostat located at that connection? If so how is the thermostat exchange accomplished?

Response From Sidom

Depends on which engine you have.....

Both are off the top radiator hose......one is easy to get to & the other one totally sucks if you have never done one before

Response From mpkell Top Rated Answer

3.1

Where is the thermostat located? The top radiator hose connects to a metal pipe...the view of that part's connection to the engine block is blocked by other engine parts. Is the thermostat located at that connection? If so how is the thermostat exchange accomplished?

Response From Sidom

Oh man.....You have the one that sux.....

That metal pipe the hose goes to is the Tstat hosing...There is an exhaust crossover pipe that "seems" to block the housing..... You can get the Tstat housing off without removing that pipe....but...it's not easy... The Tstat is off the upper radiator hose

There is a smaller metal tube with 2 hose that go to the throttle body that need to be removed to gain access to the housing. After that you can get in there to remove the 2 13mm bolts that hold the housing on.......It's not easy and a good ratchet wrench definitely helps.....


What problems are you having that makes you think the Tstat needs to be replaced?

Response From mpkell

Wild erratic temp gauge displays and not much heat to cab from heating system.

Response From Sidom

Are you having to add coolant on a regulare basis? and if you are, how much?

Response From mpkell

Yes. Add coolant light comes & goes. Just put a couple quarts or so in.

Response From Sidom

The symptoms you are descibing isn't usually associated with a bad Tstat....Normally with bad Tstats either it will stick closed and overheat rather quickly or stick open and have problems with too cool of engine temps and heater problems but not erratic temp readings...

Since you are losing coolant, you would want to pressure check the system and try to find an external leak.....If no leaks are found then you have to check for an interal leak...and....unfortunately.....some of the signs of an internal coolant leak is....No coolant leaks can be found on the outside, erratic temp readings & intermittent loss of heat inside of the cab