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Clunking noise coming from 2006 Scion TC

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Question From oneofthesick on Clunking noise coming from 2006 Scion TC

There's this clunking/popping noise coming from the engine bay. It only happens once until you come to a stop. I've jacked the car up to look for any obvious loose bolts (including engine mount), and I don't see anything.

The video better illustrates the noise.


Anyone have any ideas?

Thanks,
Mike

Response From Sidom Top Rated Answer

That looks like you have a broken motor mount.......

How did you check the mounts?

you can't just look at them...

Response From oneofthesick

The only inspection I have done is visual so I have not ruled that out. The thing that leads me to believe a motor mount is not at fault is that once the noise occurs I can't cause it to occur a second time unless I come to a stop (or at the very least change gears, as once it did happen in 1st then in 2nd without stopping). Am I wrong with this assumption?

Response From Sidom

Well with a bad mount....If it was loose enough to be causing a clunk you would think that you could get it to make the noise more than once without stopping.....So you may have something else going on but I would still want to be certain the mounts were good...

The best way to check them is to power brake the engine in forward & then reverse and look at the mount. Alot of times when they "split", the 2 broken pieces sit on top of each other so when you look at it, if you don't look real close the mount will look good. When you power brake the engine, you can see the 2 pieces seperate and it's very obvious....
Also if you get excessive engine movement in the compartment, is another sign of a weak or broken mount.....

Manauls are a little harder to check.....You have to have one foot on the brake, while popping the clutch slightly & giving it gas at the same time....... extreme caution needs to be used.....

If the mount is broken all the way.....a close inspection of rubber piece with a good light will show the "line" of the 2 broken pieces sitting on top of each other....

Response From Discretesignals

In looks like in the second part of the video you were accelerating and the clunk noise happened. Does it clunk when the transmission shifts?

Response From oneofthesick

Yes, to clarify the noise only happens under moderate acceleration. Once the noise occurs it generally will not happen again until the car comes to a stop. The noise only occurs in first or second gear and the car is a manual. In the first part of the video the noise occurs while dropping the clutch in 1st (This is the only way I could get the noise to occur with the car jacked up). In the second part the noise occurs in 2nd with the clutch fully engaged under moderate acceleration.

05 Scion Xb Tail light

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Question From hippiepunksean on 05 Scion Xb Tail light

Have a 05 Scion xb that no matter what I've tried (change bulb, New fuses, New connector, replacing all wires, even switching which side the housing was connected to just to see if it's bad wiring on that) nothing has worked....any ideas?

Response From Tom Greenleaf

? One side, one bulb doesn't light? Do you have a test light to test if power and ground get to it? What wires did you replace and why?


T

Response From hippiepunksean

Sorry that was supposed to say resplice not replace...and they were the ground which looked damaged and the wire that carries for the tail light...though that was with a connector pulled from an xb in a junk yard

Response From Discretesignals

Which side tail light is out? Your going to need to take some voltage measurements to see where the problem is in the circuit.

Response From hippiepunksean

It's the right side....and both the reverse light and turn signal still works

Response From Discretesignals

Do you have a volt meter or test lamp? Does this have any modifications such as trailer wiring?

Response From hippiepunksean

It appeared that the previous owners did do some wiring mod but no I don't have a volt tester or anything along those lines

Response From Discretesignals

I would be definitely inspecting the wiring mod. Most the time you can see what is wrong visually. The tail lamp circuit is a green wire for power and white/black wire as the ground path. If you see taped up wires, scotch locks, or other splices that don't look factory, you need to investigate those areas.

Response From Tom Greenleaf Top Rated Answer

! You aren't going to get far finding the problem without basic tools. Voltmeter, test light and probably some jumper lead to use as overlays. Total $20 for cheap stuff. Why bother if you can't test anything?


T

Response From Discretesignals

Wow, you did all that work and didn't even test the circuit using a volt meter or test lamp to see what was going on?