Motor Mounts
Thread Starter
Instructor
Joined: Feb 2000
Posts: 232
Likes: 0
From: Snohomish, WA. USA
Motor Mounts
I have pulled the motor in my '69 and am wondering what if any new motor mounts I should get. The old mounts were fine, but I am wondering if I should replace them. If I should replace them, should I replace them with standard rubber mounts, urethane mounts or solid mounts? I use the car strictly for pleasure (duh), by that I mean I don't race it and I only put around 2000 miles on it a year. Would the urethane mounts be too stiff?
TIA
TIA
Melting Slicks
Joined: Jun 2001
Posts: 3,281
Likes: 6
From: NC USA
Re: Motor Mounts (Zane)
:iagree: w/what he said. I have the polys on mine and noticed no difference in vibration and yet, as compared to the rubber mounts, they are not affected by gas or oil. Besides, changing them is something you want to do only once and while the engine is out is the best time to do it.
[Modified by Marks69BB, 8:25 PM 12/12/2002]
[Modified by Marks69BB, 8:25 PM 12/12/2002]
Le Mans Master
Joined: Aug 2000
Posts: 9,662
Likes: 7
From: Semper ubi, sub ubi
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: Motor Mounts (vette69)
I put in urethane on my new engine and they feel great in the car. I like the thought that they will be there for many years without me having to mess with them.
But from the way you describe your car usage, rubber mounts will probably do you just find.
But from the way you describe your car usage, rubber mounts will probably do you just find.
Le Mans Master
Joined: Jul 2001
Posts: 9,622
Likes: 16
From: absecon nj
Re: Motor Mounts (vette69)
I run solid mounts in mine,and i had a solid trans. mount awhile ago in my other vette and i cracked the case,a friend of mine thats a trans guy said it was because of the solid tranny mount,whether it was or it wasnt i took it out.
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Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Re: Motor Mounts (vette69)
I used stock (interlocking) type mounts but tried an old trick - drilled a hole through mounts and and fastened a 1/4-20 bolt with self locking nut. I used two bolts but one should be enough. This allows the rubber to squeeze and absorb shocks but should never come apart. Snug tighten only - no torque used. No washers used as clearance can be tight near block - make hole a tight fit for bolt (everyone likes that feeling). Took some pry bar effort to align and install frame bolts, had to loosen block bolts first.
Hope I'm not too late to help,
cardo0 [IMG][/IMG] :)
Hope I'm not too late to help,
cardo0 [IMG][/IMG] :)
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: Motor Mounts (vette69)
Summit sells the poly energy suspension motor mounts for our Vettes for about $35 each.
I might be off on my thinking. :conehead But certian people on this forum install a front spreader bar. Then they claim greater cornering speed due to less frame flex.
IMO if you have near ridged motor mounts like my poly ones. Isn't the motor acting like a super ridged cross brace? :confused:
I might be off on my thinking. :conehead But certian people on this forum install a front spreader bar. Then they claim greater cornering speed due to less frame flex.
IMO if you have near ridged motor mounts like my poly ones. Isn't the motor acting like a super ridged cross brace? :confused:
Safety Car
Joined: Aug 2000
Posts: 3,909
Likes: 26
From: Clymer PA
Re: Motor Mounts (vette69)
I'm running Moroso solid motor mounts and a Moroso solid tranny mount and love them. It does have some vibration but nothing bad. I could get rid of a lot of the shifter vibration by using a rubber tranny mount but the solid works fine. When I rev the motor the engine torques very little....but the car rocks pretty good :)