Shop Jeep Window Motors

0.04v between alternator casing and negative on battery.

Alternator at minimal load is 13.9. Max load 13.7
Battery at minimal load is 13.7. Max load 13.0 and falling. 0.1v per 10 seconds. Didn't matter if I had my ground as a bolt or the battery negative.

It may be possible that the problem is intermittent. I have a 12v battery charger if needed, but could it help to run down the battery (still be able to jump it) and see if the alternator will recharge now?

As long as the bolt has a good path to to the battery negative, you can do that. Most techs connect to the battery terminal because you know that is the best ground to use for a reference.

It isn't unusual for some charging systems with all accessories turned on, as the engine is idling for a long period of time, for the battery voltage to drop to 12.6V or even lower. If you bring the rpm up, the voltage should come back up. This is more common on vehicles with loads of electrical accessories.

It could be intermittent charging system failure, but you have to catch it. You could also have excessive draw on the battery when the vehicle sits over night. If you have something drawing more than .050 A with the vehicle turned off, that will cause a no crank because of a discharged battery.

The very odd thing is expecting I have a totally dead battery and I jump the car it should run. My issue was after the car was jumped it would stall within 2 seconds.

I guess I can try it with this new battery for a while and see if the car dies again.
I expect the time will come when it will not start but will run (after a jump) before it won't start and won't run (after a jump) so I can use it until it won't start. When I have to jump it I know the battery still isn't being charged. And move to the next idea.

You start mixing parts together and your going to run into problems. The 2002 heads are different than the 2005. The 2002 uses the Jtech controller and the 2005 uses the NGS controller. They also have different emissions characteristics. Your better off having the heads on the 2005 checked out by a machine shop and finding a good low mileage salvage yard engine for the 02. They will probably want your old engine for a core.

Keep everything the way it was intended and you won't have issues.

I am aware I would have to install the cam gear with tone ring off the 05 head onto the 02 head & use the 05 intake manifold . It is my understanding the long blocks are the same . Are there other differences in the long block that you're aware of that I'm not ? I'm very capable of doing the part swapping & am more concerned with a possible bearing failure on the high mileage crankshaft . It has no bearing noise now though & I'm sure those 200,000 mile bearings have some wear . I know that no engine builder would recommend this but I'm very tempted to give it a try .
I really appreciate all feedback & I fully realize it's a crap shoot but I'm still wondering what you think about the crank bearings . A complete engine gasket set & rod & main bearings aren't really very expensive . I have checked & the same gasket set is listed as being compatible with both year models . Don't think I don't value your opinions because I do . By the way I'm retired & have plenty of time which I'm not putting much value on . If you firmly believe I'm setting myself up for failure speak up & say so . If you think I have some chance of success I'd like to hear that too .

I know that no engine builder would recommend this but I'm very tempted to give it a try .


So, why are you even asking if you already know the answer.

You sound like the daredevil that is waiting for his drunk buddies to talk him into jumping off the cliff.

Logan: Was just watching this thread. Your first thoughts were you'd get laughed at or discouraged at least which you expected. Not laughing at YOU or personal but unless you just have time and the money to blow trying this it was all over for me when you stated the miles on these vehicles. There's a limit to vehicles in general if used up at all and clearly if they BOTH couldn't make the 200K (that alone takes real care from new) without needing the kind of work mentioned suggest not much else was cared for either.


All that even if engines were a perfect drop in match my 2 cents is don't do this.


Some is my opinion and some experience thru others failures as I wouldn't do this is that by the time a lower end of an engine is messed up at best you only buy some extra time as all the best machine work known doesn't make it new again,


T

Really don't think it is going to work. The combustion chambers are probably different and when you start swapping high mileage parts around, such as camshafts, that are worn the other parts they are matched to, your going to create more issues. Not positive, but I don't think 2005 uses EGR and the 2002 does? If the numbers on the heads don't match, I really wouldn't recommend swapping them.

If your mind is already made up to go ahead with your project, good luck and let us know how things turn out. Maybe we can all learn something.

Logan - DS just added a couple more reasons and since I'm spouting off just share a tid-bit on even making NEW engines.
New - 100% new! The parts don't fit the next one perfectly and the machine bits are changed up to every 5 uses! At those extremes they still blow up by some % before ever being put in a vehicle!


That just machine work of mostly the crankshaft not even concerning any mid model year changes might go on to minimize how many blow up instantly, by that I mean bust into a broken mess of metal!


OK: What is high miles: It is going to greatly depend on quality of design AND care along the way. In general I say about 100K dependability drops off like a rock could be average. The exceptions are everywhere and you hear less about the ones that didn't make it that far,


T

Oh my! Has it ever dawned on you to look for a whole vehicle in good shape, checked out as much as possible and just deal with some surprises? Guess not and you are hell bent on fixing wrecks.


Miles, time, how stored with this new wreck. How long did it sit and more? Windows all broken and interior all wrecked too? Long list of stuff that goes wrong or hidden problems from wreck which is why they are totally not just body damage but strange crap happens down the road that might not seem involved but can be a choice when or if you needed a used part or whole component.


Color! Yikes! If that's a factor I give up on a used vehicle where any thought of its usefulness counts! "Gee, I like that color whether it runs or not because is looks good" -- can't win that game.


Buddy - miles and time plus how driven and where parked/stored all matters. With miles think a bit. Every part of that vehicle has gone that far. Some things doesn't matter but a lot does. Springs for seat go bad, upholstery wears out or sun damage. Rust if applicable always a concern. Motors for windows and locks etc., don't like not being used! I did do up antique cars and now driving one as my primary driver so do have a clue. Rear door locks went first! Just fixed them both no problem as I do that.


Glove box latches and sun visors - OMG some crap just never ends. Most new cars that don't get sold within TWO years are destroyed to be recycles for the materials if you didn't know! Gear cases can't sit way too long without oils splashing around nor seals on anything all go bad. Got the T-Shirt on this crap. Gettin' old and tired too for this stuff.


Not here to stifle your vigor and motivation just to warn you of details that can run you project into the RED meaning cost more than not doing it at all. If this is a dream and fun for you and costs won't harm you go for it. You may learn, win or learn that it was a bad move from the get go but it's all learning.


If you are just ambition driven to do this who am I to choose what you do? I did this crap relentlessly when VERY young and didn't lose $$ doing it but times were different too and parts up to whole cars could be had for FREE just needing a ton of dinky stuff but no longer road worthy which helped totally of course. For quite a while you had to pay to dispose of some metal thing car or whatever as new was much more practical for plain metals..........


Tom

(Links not allowed- sorry, your pics only)
Folks , if you don't have the patience or inclination to discuss this with an open mind maybe I'm not in the right forum . As I mentioned before I'm retired , have time on my hands , actually enjoy working on vehicles ---Mistakenly thought that's what this forum is about--- & do things like this for a hobby more than anything else . Recently bought a nice looking car with a bad transmission , bought a good used trans for $250.00 , paid $500.00 for the car , added a couple days labor & sold the car for $4,000.00 . I could go on about past experiences but I won't . In a previous life or you could say years ago I actually worked as a mechanic for 2 different new car dealerships .

My wife & I already have 3 nice vehicles in a 2 person household so I'm not out looking for a nice , road ready vehicle for our personal use but the wife did take a liking to the 02 Liberty . I don't normally give away vehicles but there is a young family member , still in school with a lot of extra activities that I'm considering giving the 05 to . Doesn't anyone enjoy working on vehicles anymore or is everyone now sign & drive & take the vehicle to a shop to get air put in the tires ?
I can't vouch for the above link but it lists the head as being compatible with both the 05 & 02 . If you're just going to tell people to go find a nice newer vehicle & sign & drive , what's the purpose of this forum ?

Sport - If you can "flip" (buy low, sell high) cars with the demonstrated and admitted "shade tree" experience YOU claimed than go for it. Nobody here is paid a penny for sharing experience and some with very specific info.


This isn't quite as simple as you may think and admitted. YOU said and expected just what you expected in your top first post.
If unhappy with experienced free suggestions is all they can be without being right there than choose one of any of millions of places on the web to do what you are going to do anyway no matter what anyone suggests.


Why are you here then?


This thread is pointless,


T

Fine with me , go find someone to pump your gas for you . Say whatever you want , I won't be back to see it anyway & if it's within your power cancel my membership on this website . Ban me or whatever you like , I couldn't care less at this point .

Feel better now? Can't answer yet as I'll just lock this thread and yes even you can ask to re-open it by any moderator including me.


As others, wish you luck with the endeavor,


T

How much experience do you have with engine rebuilding?