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Strange noise behind pass. seat by OpFlash
Started on: 12-19-2007 06:14 PM
Replies: 13
Last post by: luvin_my_fiero on 12-20-2007 01:01 PM
OpFlash
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Report this Post12-19-2007 06:14 PM Click Here to See the Profile for OpFlashClick Here to Email OpFlashSend a Private Message to OpFlashDirect Link to This Post
OK I thought it was the battery hitting the firewall because it wasn't tied down, but I took care of that and it's still happening. Whenever the car surges forward a little something back there makes a "knock" sound, usually when I'm letting out the clutch in first, etc. but even with my foot off the clutch I can get it to do it at very low RPM. It sounds like its coming from below or behind the passenger seat. Anyone have any ideas what might be loose? 87GT 5spd.
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Report this Post12-19-2007 06:18 PM Click Here to See the Profile for 1986GTV8Send a Private Message to 1986GTV8Direct Link to This Post
A knock not a clunk. If it were a clunk I would suspect ball joints.

I am certain that others will chime in.

John
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Report this Post12-19-2007 06:40 PM Click Here to See the Profile for FieroGT42Click Here to Email FieroGT42Send a Private Message to FieroGT42Direct Link to This Post
Could be a totally borked mount..? I suspect this is what I have...
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luvin_my_fiero
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Report this Post12-19-2007 07:17 PM Click Here to See the Profile for luvin_my_fieroClick Here to visit luvin_my_fiero's HomePageClick Here to Email luvin_my_fieroSend a Private Message to luvin_my_fieroDirect Link to This Post
could be any of the motor/trans mounts...possibly even the dog bone. where in NC are you at?

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MordacP
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Report this Post12-19-2007 08:02 PM Click Here to See the Profile for MordacPClick Here to Email MordacPSend a Private Message to MordacPDirect Link to This Post
I think the dog bone/front engine mount is your best bet because I have the same problem as you. You can find these easily.
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Dodgerunner
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Report this Post12-19-2007 08:23 PM Click Here to See the Profile for DodgerunnerClick Here to visit Dodgerunner's HomePageClick Here to Email DodgerunnerSend a Private Message to DodgerunnerDirect Link to This Post
I have the same thing on my 85Gt.
I know it's not the ball joint, bushings and believe it's not the strut.
My dog bone is good and has polly bushings.
Front cradle bushing are good shape and tight.
Think the front engine shock mount could do that?

I'd say mine sound between a knock and a loud pop... You can kind of feel it.

[This message has been edited by Dodgerunner (edited 12-19-2007).]

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luvin_my_fiero
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Report this Post12-19-2007 08:47 PM Click Here to See the Profile for luvin_my_fieroClick Here to visit luvin_my_fiero's HomePageClick Here to Email luvin_my_fieroSend a Private Message to luvin_my_fieroDirect Link to This Post
another thing to check is when the motor is cool(obviously) try and rock it back and forth and also do the same thing with the exhaust.
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OpFlash
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Report this Post12-20-2007 12:40 AM Click Here to See the Profile for OpFlashClick Here to Email OpFlashSend a Private Message to OpFlashDirect Link to This Post
Thanks all. Good suggestions. I was thinking along the lines of a motor mount. It sounds like whatever it is is very close to the passenger compartment, like on the front side of the engine. I'll try to move the engine by hand and see what happens.
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OpFlash
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Report this Post12-20-2007 12:41 AM Click Here to See the Profile for OpFlashClick Here to Email OpFlashSend a Private Message to OpFlashDirect Link to This Post

OpFlash

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Member since Nov 2007
 
quote
Originally posted by luvin_my_fiero:

could be any of the motor/trans mounts...possibly even the dog bone. where in NC are you at?


I'm in Cary, essentially Raleigh. I think we're about 2 hrs away from each other.

[This message has been edited by OpFlash (edited 12-20-2007).]

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luvin_my_fiero
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Report this Post12-20-2007 12:58 AM Click Here to See the Profile for luvin_my_fieroClick Here to visit luvin_my_fiero's HomePageClick Here to Email luvin_my_fieroSend a Private Message to luvin_my_fieroDirect Link to This Post
You might even get lucky, I had a 91 Taurus SHO that was clunkin like that so I was about to order new mounts but before, I crawled under and 2 bolts had come out of the mounts. 2 new bolts and problem was solved. If you have a garage, just get under and start lookin and grabbin things...eventually you will find it. Good luck

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Keith
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86&96 Corvette
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73 Lotus Europa Twin Cam
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FieroGT42
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Report this Post12-20-2007 11:31 AM Click Here to See the Profile for FieroGT42Click Here to Email FieroGT42Send a Private Message to FieroGT42Direct Link to This Post
Sorry, I just have to...

"Strange noise behind pass. seat"

What the hell's that engine doing back there?
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Report this Post12-20-2007 11:57 AM Click Here to See the Profile for 2.5Send a Private Message to 2.5Direct Link to This Post
pass side CV shaft?
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Xanth
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Report this Post12-20-2007 12:19 PM Click Here to See the Profile for XanthClick Here to visit Xanth's HomePageSend a Private Message to XanthDirect Link to This Post
Would a bad cradle bushing allow for that kind of noise?
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luvin_my_fiero
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Report this Post12-20-2007 01:01 PM Click Here to See the Profile for luvin_my_fieroClick Here to visit luvin_my_fiero's HomePageClick Here to Email luvin_my_fieroSend a Private Message to luvin_my_fieroDirect Link to This Post
Im sure it probably would but I would think you would also feel the ass end wiggle too..wouldnt ya? Im sure this would drive a person nuts but I still think the best way is to just get under there with a GOOD light and start pushin and pullin on everything.
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