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#1 |
Registered User
Join Date: Jan 2008
Location: Raleigh, NC
Posts: 321
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Polyurethane or rubber motor mounts?
Does anyone use the Polyurethane? The seem pricey compared to the $16 I can set of stock onces at NAPA for. Was wondering if they are worth it?
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#2 |
Registered User
![]() Join Date: Oct 2005
Location: Sacramento, CA
Posts: 1,970
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Re: Polyurethane or rubber motor mounts?
My NAPA mount (drivers side) is history after only 3,000 miles and though I thought about spending the extra $$ on the poly type, I didn't.....wish I would of. I have quite a bit more hp than stock, So I should've known better.
Who has the best Price on these? Best I've seen is $90 for the pair.
__________________
72 Cheyenne SWB Fleet Nut & bolt frame off in progress...99.9999% - supercharged 383 - 4 wheel discs - relocated fuel tank - ![]() My Build Thread |
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#3 |
Registered User
Join Date: Jun 2008
Location: South Florida
Posts: 11,375
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Re: Polyurethane or rubber motor mounts?
Oh Boy I also have a little bit more power than stock. I wonder how long mine are going to last. It is one of those things that I did not think further ahead. Someone post a link to what you fellowes are looking at.
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Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild |
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#4 | |
Registered User
Join Date: Jan 2008
Location: Raleigh, NC
Posts: 321
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Re: Polyurethane or rubber motor mounts?
Quote:
Here is a set from Summit http://store.summitracing.com/partde...5&autoview=sku My motor is going to be around 290 HP. With that HP should I even bother with the poly's? How long do the rubber ones last? I really don't want to change them again. |
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#5 |
White wall terror
Join Date: Feb 2009
Location: Croydon, Pa.
Posts: 152
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Re: Polyurethane or rubber motor mounts?
Buy them, I don't have them in my truck (yet) but I do have them in my Nova, Well worth the money. Mine are from Energy Suspension.
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#6 | |
"THE GREEN GOBLIN"
Join Date: Mar 2008
Location: Fremont Ca.
Posts: 1,025
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Re: Polyurethane or rubber motor mounts?
Quote:
Let me know if your interested I have no use for them...
__________________
![]() "THE GREEN GOBLIN" 1972 Cheyenne 10 Short Fleet Side Front 2.5inch Spindles with 2inch Springs Rear 4inch drop Springs. 454BBC TH400,Posi 1971 Cheyenne 10 Long Fleet Side 454BBC TH350,Posi ![]() Drive it like you stole it! ![]() Petey-pablo@sbcglobal.net Last edited by petey-pablo; 03-24-2009 at 10:45 AM. Reason: 7-509 |
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#7 |
Senior Member
![]() Join Date: Jan 2009
Location: Austin, TX
Posts: 1,079
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Re: Polyurethane or rubber motor mounts?
you may want to modify the mounts depending on the style so you can remove them without taking the motor out (usually you have to cut the bottom off so you can access the bottom motor bolt with a wrench) the mounts I bought from carquest were like that I don't know about the NAPA mounts
has anyone else done this?????
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-- Josh Instagram: @americanmusc1e OLD SKOOL-- 1970 C10. 454/Th400/3.07 posi Build Thread FARM TRUCK----1949 Chevrolet 3800 Power Wagon Hauler Build Thread 1999 4wd OBS Tahoe - daily. DM me if you can't see photos i posted |
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#8 |
Under Construction
Join Date: Oct 2007
Location: Midlothian,TX (DFW)
Posts: 4,555
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Re: Polyurethane or rubber motor mounts?
I have always heard that the poly squeak, and that they will bounce you around like crazy because they are soo stiff. is this true?
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#9 |
Registered User
Join Date: Jan 2008
Location: Raleigh, NC
Posts: 321
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Re: Polyurethane or rubber motor mounts?
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#10 |
Bloodied Knuckles
Join Date: Jan 2009
Location: Grass Valley CA
Posts: 273
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Re: Polyurethane or rubber motor mounts?
not sure how true it is but I heard the same thing about poly.
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#11 |
Registered User
Join Date: Dec 2006
Location: Rolla, MO
Posts: 2,463
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Re: Polyurethane or rubber motor mounts?
I wouldn't think they would bounce you around being motor mounts. I would say they might stiffen things up a bit so you don't get as much side to side flex.
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#12 |
Senior Member
![]() Join Date: Jul 2004
Location: Estherville, Iowa
Posts: 3,371
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Re: Polyurethane or rubber motor mounts?
We bought the poly mounts when we put a 383 in the 1971. Didn't want anything breaking, BUT ........These mounts either stock of poly use a single 7/16 bolt to hold it to the frame. Dont remember on the stock mounts, but the poly mounts from Summit have threads in the 1/8 steel plate that is part of the mount. I'll bet there are only 3 or 4 threads in there to hold that bolt. The poly mounts will never break, but I'm not happy at all with the design of the "better" poly mounts. I am waiting for those threads to pull out and wreck something, won't buy any more unless they redo the design.
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1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0 |
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#13 |
Registered User
Join Date: Jun 2008
Location: South Florida
Posts: 11,375
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Re: Polyurethane or rubber motor mounts?
my truck has around 700 miles since completion and I just ran the motor for about ten minutes and it is solid no moving at all so I guess I will wait till I see them begin to tear.
__________________
Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild |
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#14 |
Registered User
![]() Join Date: Oct 2008
Location: Avondale, PA. South east corner of the state
Posts: 75
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Re: Polyurethane or rubber motor mounts?
I bought mine from Summit. A complete kit(motor mounts and trans mount). The poly motor and trans mounts are more durable and more resistant to oil, fuel and grease. They won't break down from chemicals and provide a stiffer mount as opposed to rubber. Will probably outlast your truck. The motor and trans mounts won't squeak because once everything is bolted down, they don't have a chance to move. Poly Cab mounts on the other hand also provide the same great benefits but also take away from the ride quality a bit. A little squeak here and there but not constant. Hope this helps.
Forgot to mention, you have to use a poly trans mount if you are going to use poly motor mounts, if not, too much flex in the tailshaft of trans and ...el cracko to the case.
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When I grow up, I want to be the man my wife married. I used to be schitzophrenic, but we're O.K. now ![]() Last edited by john02fxdl; 03-23-2009 at 09:41 PM. Reason: Forgot one last bit of info. |
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#15 |
White wall terror
Join Date: Feb 2009
Location: Croydon, Pa.
Posts: 152
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Re: Polyurethane or rubber motor mounts?
I have motor, tranny, and body poly mounts in my Nova and I have no squeaking at all. The energy suspension mounts in my opinion are far superior then the factory mounts, With no flex at all. Its a very solid mount but not as harsh as a true solid mount. There great for the performance application.
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#16 |
Registered User
![]() Join Date: Oct 2005
Location: Sacramento, CA
Posts: 1,970
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Re: Polyurethane or rubber motor mounts?
Best way to see if it's broke or not is put the truck in a forward gear and give it gas while holding the brake.......if you blip the throttle back and forth, you will feel the motor slam back down if the mount is broken......usually it's the driver's side that gives up.
__________________
72 Cheyenne SWB Fleet Nut & bolt frame off in progress...99.9999% - supercharged 383 - 4 wheel discs - relocated fuel tank - ![]() My Build Thread |
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