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Your motor mount experience(s)
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VTSS
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PostPosted: Tue Jan 29, 2013 8:12 pm    Post subject:  Your motor mount experience(s) Reply with quote

Hey everyone. My SS has a new sound coming from the front of the car. It is a clunking noise over bumps that seems to be coming from the passenger side front wheel area. When I got my last alignment done I mentioned it to the mechanic just to check and make sure the suspension was solid - he didn't find anything wrong with it.

Aside from the clunking noise the car also shakes while braking from 40MPH+. It feels like a warped rotor but if I put it in neutral the shake goes away. Looking at the mount from the wheel well it doesn't look like there are any cracks in it or chunks of rubber missing. I already replaced the sway bar end links and bushings with no luck.

My question is to those who have had motor mounts go bad. What were the symptoms your car had? Is there any way to "test" the mount to be sure it is bad?

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PostPosted: Tue Jan 29, 2013 8:45 pm    Post subject:  motor mount. Reply with quote

Not had that problem, yet. One way to check is to watch for excessive engine movement while someone does a power brake. Cool

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PostPosted: Tue Jan 29, 2013 10:39 pm    Post subject:   Reply with quote

Assuming you're referring to upper engine mounts, and not lower:

Have someone shift from park-reverse-neutral-drive. If the upper mounts are worn, the engine will slam around in the upper mounts.

My buddy thought he had a transmission problem but it was really just the mounts. The engine would lean forward when he shifted and it shook the car.

Not sure how to check the lowers, aside from looking for obvious rotting or gaps from shrunken/dried out rubber.

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VTSS
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PostPosted: Tue Jan 29, 2013 11:18 pm    Post subject:   Reply with quote

Lingenfelter wrote:
Assuming you're referring to upper engine mounts, and not lower:

Have someone shift from park-reverse-neutral-drive. If the upper mounts are worn, the engine will slam around in the upper mounts.

My buddy thought he had a transmission problem but it was really just the mounts. The engine would lean forward when he shifted and it shook the car.

Not sure how to check the lowers, aside from looking for obvious rotting or gaps from shrunken/dried out rubber.


I will check the upper mounts. I was referring to the lower mounts sorry for the confusion but it could very well be the uppers I never thought about that.
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PostPosted: Tue Jan 29, 2013 11:19 pm    Post subject:   Reply with quote

Be sure to check the rubber bushing in the dog bone as well. I had all sorts of nasty noises when mine were loose.

Edit: to be clear, I'm referring to the round rubber bushing that attaches to the engine side of the dogbone.

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PostPosted: Wed Jan 30, 2013 8:23 am    Post subject:   Reply with quote

The lower is oil filled. They collapse when the fluid leaks out. You can usually tell if they've been leaking.

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PostPosted: Wed Jan 30, 2013 12:43 pm    Post subject:   Reply with quote

outonthetiles wrote:
The lower is oil filled. They collapse when the fluid leaks out. You can usually tell if they've been leaking.


Really? Interesting, didn't know that.

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PostPosted: Wed Jan 30, 2013 3:23 pm    Post subject:   Reply with quote

Lingenfelter wrote:
outonthetiles wrote:
The lower is oil filled. They collapse when the fluid leaks out. You can usually tell if they've been leaking.


Really? Interesting, didn't know that.


Anchor makes a solid rubber mount to replace the hydraulic lower. I would recommend that one. It's right under the crank pulley so it sometimes is mistaken for a crank seal leaking.

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PostPosted: Wed Jan 30, 2013 7:20 pm    Post subject:   Reply with quote

I had purchased a solid mount a few months back just as a mileage tune up part. I had time today and with the fairly warm weather I swapped out the mount and decided to change the front sway bar end links (again) just in case. I drove 40 miles after and the noise seems to be gone. The factory mount was cracked and much softer than the one I replaced it with. I also noticed the radiator side dogbone/insert upper mounts were split so I will be replacing those soon too - probably with a solid set.

Now onto fixing my transmission leak and exhaust leak. Always something Very Happy

Thanks everyone

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PostPosted: Wed Jan 30, 2013 11:08 pm    Post subject:   Reply with quote

ScottMPala wrote:
Lingenfelter wrote:
outonthetiles wrote:
The lower is oil filled. They collapse when the fluid leaks out. You can usually tell if they've been leaking.


Really? Interesting, didn't know that.


Anchor makes a solid rubber mount to replace the hydraulic lower. I would recommend that one. It's right under the crank pulley so it sometimes is mistaken for a crank seal leaking.


AFAIK, even the mounts that are listed solid are actually hollow and are either water, oil, or air filled. A while back on one of the gp forums I remember reading that someone bought one of the "solid" mounts and it was filled with air. What most people do for a solid mount is buy an aftermarket one, drill a hole to drain it, clean out the inside with brake cleaner, and fill it with either some polyurethane or window weld. Please correct me if I'm wrong and the Anchor mounts are truly solid.

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PostPosted: Wed Jan 30, 2013 11:25 pm    Post subject:   Reply with quote

outonthetiles wrote:

AFAIK, even the mounts that are listed solid are actually hollow and are either water, oil, or air filled. A while back on one of the gp forums I remember reading that someone bought one of the "solid" mounts and it was filled with air.


I remember seeing that on a couple of the W-body forums and opted to go with an OEM mount because of it.

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PostPosted: Wed Jan 30, 2013 11:54 pm    Post subject:   Reply with quote

The brand I got was "DEA/TTPA" whatever that is. $27+ S/H
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PostPosted: Thu Jan 31, 2013 12:06 am    Post subject:   Reply with quote

outonthetiles wrote:
AFAIK, even the mounts that are listed solid are actually hollow and are either water, oil, or air filled. A while back on one of the gp forums I remember reading that someone bought one of the "solid" mounts and it was filled with air. What most people do for a solid mount is buy an aftermarket one, drill a hole to drain it, clean out the inside with brake cleaner, and fill it with either some polyurethane or window weld. Please correct me if I'm wrong and the Anchor mounts are truly solid.


This is pretty interesting, would be wierd if they are selling solid but they arn't.. Also, do people really use window weld? I heard people using it but alot of them say it cracks easily, doesn't seem very perfessional.

Anyway, sorry that I am late to the party, but I have some pictures for you guys. Thought I would show you a busted hydralic motor mount. This is the mount that kept my engine up for 13 years, looks like it busted at some point and it leaks everywhere. If you didn't know better, like stated before, you would think you have a oil leak. Sorry if these arn't the best pictures, these are taken trying to sit in the engine bay.



Oil oozing everywhere!


Looks like regular oil


The transmission mount seemed to last 13 years just fine lol

Hope this helps for future reference!

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PostPosted: Thu Jan 31, 2013 12:41 am    Post subject:   Reply with quote

TeenBeach wrote:
outonthetiles wrote:
AFAIK, even the mounts that are listed solid are actually hollow and are either water, oil, or air filled. A while back on one of the gp forums I remember reading that someone bought one of the "solid" mounts and it was filled with air. What most people do for a solid mount is buy an aftermarket one, drill a hole to drain it, clean out the inside with brake cleaner, and fill it with either some polyurethane or window weld. Please correct me if I'm wrong and the Anchor mounts are truly solid.


This is pretty interesting, would be wierd if they are selling solid but they arn't.. Also, do people really use window weld? I heard people using it but alot of them say it cracks easily, doesn't seem very perfessional.

Anyway, sorry that I am late to the party, but I have some pictures for you guys. Thought I would show you a busted hydralic motor mount. This is the mount that kept my engine up for 13 years, looks like it busted at some point and it leaks everywhere. If you didn't know better, like stated before, you would think you have a oil leak. Sorry if these arn't the best pictures, these are taken trying to sit in the engine bay.



Oil oozing everywhere!


Looks like regular oil


The transmission mount seemed to last 13 years just fine lol

Hope this helps for future reference!


Thanks for the pics! I wanted to replace the mounts last June when I had the engine out but didn't get around to ordering the new set Mad

The mount I took out today was completely dry except for some oil on the bottom - although there appears to be fluid in the subframe where the mount sits..this pic is from last june


I pulled the engine to replace the oil pan gasket, at the time I figured the oil in the subframe was from the bad gasket or from doing oil changes and oil dripping out of the filter neck.

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PostPosted: Thu Jan 31, 2013 1:31 pm    Post subject:   Reply with quote

Yes, people have used window weld, I've heard good and bad things. When I made the trans mount for my swap I used this stuff: http://www.energysuspensionpar.....rod=DIYMMI It worked great, I'm planning to buy some more to fill a "solid" motor mount that I bought.

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