Melted Urethane Mounts. Other options?

[BillC]

I pulled my motor out yesterday, and discovered that my Energy Suspension Urethane motor mounts (installed using Jeff's pads) have melted. The urethane didn't disappear or run, but it looks like it got very soft and sagged to the point where the metal parts are touching inside. The urethane is also very soft now -- I can move both sides by hand very easily, and can feel the metal rubbing.

I used heat shields, so they were protected. Both sides are equally sagged/melted.

Does any other company make decent V8 mounts? Especially ones that will work with Jeff's pads? I'm looking for something that has the interlocking design but won't melt like the ES urethane. After all the fun I had installing the V8 mounts, I really don't want to go back to the stockers, but I'm not putting ES mounts in again!

 

[JSM]

That is very interesting the even with heat shields they melted.

Weird...

Those mounts are standard chevy V8, so the options are as endless as mounts get. I wonder if I have to design a mount now. GRRR!

Did you have stock manifolds or headers?

Jeff

 

[JSM]

I called ES, and they were pretty much worthless.

I did look up polyurethane specs, and operating temp is lacking more so than I thought.

I am looking at alternatives besides going solid.

 

[HighPerformanceTrucks]

Try Rockford Racecraft.

 

[E-Rue]

Try Rockford Racecraft.

NO

e

 

[Tydriver]

Try Rockford Racecraft.

LMFAO..... yeah thats it.. So he can sell ya some mounts that are overpriced and used.......

Wheres the phone #...... LOL

 

[BillC]

Those mounts are standard chevy V8, so the options are as endless as mounts get. I wonder if I have to design a mount now. GRRR!

Well, I was hoping there would be other options. Unfortunately, the only options of which my local speed shop was aware are stock factory rubber mounts, ES-style urethane mounts or solid. I really don't want to go solid....

Did you have stock manifolds or headers?

The stock factory exhaust manifolds. In fact, I even used the factory heat shield on the driver's side (had to make a new one on the pass side, since the shield mounts differently).

I am looking at alternatives besides going solid.

Please let me know what you come up with. I'm also looking, but not having much luck. What I want is a mount with an interlocking design (like the ES) but with rubber isolation, not urethane.

Try Rockford Racecraft.

Rockford uses the exact same mounts as Jeff. The mounting pads I got from Jeff aren't the problem -- they were (and are) just fine. It's the actual ES mounts that went bad.

Anybody familiar with the factory V8 mounts? Are they any better than the factory V6 mounts?

 

[JSM]

I have a design in mind, but not sure what kindof material I want to use yet. Polyurethane temp rating sucks, after some research.

I called ES, and they were of no help, kindof blew me off actually but did tell me streetrods have same problem.

Design for new mount itself is done, just need to find a material with enough flex, but not that much, and will hold heat.

Jeff

 

[JSM]

I am starting to think only stock manifold people will have trouble. After more research Urethane operting temp lacks IMO.

I do have a new material I want to try check you PM Bill.

 

[jwaller]

my first set of ES mounts melted on ATR headers and no heat shields...but it seems that the heat shields wouldnt have helped anywho....

 

[Christian Dionne]

Jeff, maybe you can check with Paul Ferry of HRPartsNStuff. He's a Buick vendor that makes his own Poly mount from another source. I haven't heard of TurboBuicks melting polys and I would think their passenger side would get hot.

This is kinda sucking, I don't want to swap out the polys either.

 

[Lynn D. Brown]

ES Poly Mounts

ES Poly Mounts

Bill & Guys,

I am putting in the ES Polys that I got from Rockford - Guy R.- and was just going to use the same Heat Shields that were on the stockers. The stock Mounts look OK, altho' perhaps a little swelled out.

So, if these shields protected the stockers, why wouldn't they protect the ES Polys' ? I'm not sure, but wouldn't the PolyU have a higher T rating than the stock Rubber ? Maybe I should stuff some insulation in there.

 

[Guest]

This makes me nervous.......

JW, what did YOU do after the first attempt failed?

I am running the Poly's, ATR headers and without the stock heatshields.

 

[E-Rue]

im running polys with no heat shields, and ATR headers as well.

ill try and take a look at them this weekend and see whats going on.

e

 

[Typhoonracer]

I can see that mine are distorted...
I will know for sure in a few days when the motor comes out.

I am done with them if thats the case.
I will go solid.
use the poly tranny mount.....

and NOW we have 7 inches of snow on the ground!!

Steve

 

[Lynn D. Brown]

Melting Poly

Melting Poly

Bill & Guys,

This is starting to sound like an epidemic ! Look over at the SyTy Lounge, and guys R melting their Poly Upper A bushings also. My GN experience is :

I have melted two rear Pass. Poly bushings on the Upper Control Arm of my GN twice. It is an aftermarket Hotchkis Upper A, and the ATR headers come within ~ ¼-½" of this joint. The 1st time I didn't have a Heat Shield, and it pretty much destroyed the bushing. The next time, I tried one of Hotchkis's shields - real thin SS - and this time I burned off the outer lip, which holds the Upper A tight. Then the arm slid back & forth - not one of my favorite things ! This time, I am trying a Kirban (GN vendor) shield, which is thicker and bigger, and I stuffed some Fiberglas insulation in there.

A competitive aftermarket Suspension outfit, Global West, puts a brass bushing at that location, which should say something.

 

[4C FED]

:flash:

 

[JSM]

Proper shielding should stop the issue.

Way back when Tony had issue but didnt' have heat shields, hence my warning on my motor mount page.

Obviously heat shield are not enough, atleast stock ones.

I think I have a solution, will be making prototype soon to test my theory.

 

[ericguy320]

on the c4 the mount was wraped in a reflective box ( under the a/c comp)only the bolt holes were visable. the converter was about an inch or so away

 

[mrweelr]

OK this is fuggin lame. I have two brand new ES engine mounts, ES poly tranny mount, and Jeff's plates ready to go in my truck. But after reading this, I'm not about to go through all the work swapping them out only to melt 'em in short order. Can't someone fab up an effective heat shield to work with the ES mounts!?! Feeling pretty bummed out after reading this...