Motor mounts...
Thread Starter
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
Motor mounts...
Gonna order the energy suspension polys from summit. What's the general overall view on these? Any mods necessary?
How hard is the job? Can I do it with a wrench set, jack stands, jack and a block of wood? Anything I should watch out for?
Thanks in advance..
-Steve
How hard is the job? Can I do it with a wrench set, jack stands, jack and a block of wood? Anything I should watch out for?
Thanks in advance..
-Steve
Melting Slicks
Joined: Feb 1999
Posts: 3,349
Likes: 1
From: Colorado
Re: Motor mounts... (Pacin'California)
I love my urethane motor mounts, but VERY tough to install.
The problem I saw was that despite the heavy big block engine, the stiff mounts seemed to cause the engine to sit high. A punch and a hammer or mallet as well as a case of your favorite beer will definitely help.
What I did was to push and pry until part of the hole lined up, and then stuck the skinny tip of the punch in the hole and tap it in. That pulled the mount down and seated it. Then I started the mount bolt, and had to screw it in, it was so tight. BUT that worked. And then I did the other side.
How does it do? Just as good as solid metal motor mounts but without the vibration. I mean, it does not allow one bit of engine rocking. The whole Corvette torques instead of just the engine. I went to those because I had tall valve covers with power brakes, and wanted my cake and eat it too.
And it worked.
So it's worth the effort.
The problem I saw was that despite the heavy big block engine, the stiff mounts seemed to cause the engine to sit high. A punch and a hammer or mallet as well as a case of your favorite beer will definitely help.
What I did was to push and pry until part of the hole lined up, and then stuck the skinny tip of the punch in the hole and tap it in. That pulled the mount down and seated it. Then I started the mount bolt, and had to screw it in, it was so tight. BUT that worked. And then I did the other side.
How does it do? Just as good as solid metal motor mounts but without the vibration. I mean, it does not allow one bit of engine rocking. The whole Corvette torques instead of just the engine. I went to those because I had tall valve covers with power brakes, and wanted my cake and eat it too.
And it worked.
So it's worth the effort.
Melting Slicks
Joined: Dec 2000
Posts: 3,407
Likes: 2
From: Carmichael CA
Re: Motor mounts... (Pacin'California)
In my opinion the poly mounts don't absorb any noticeable vibrations. I went with the Moroso solid mounts!
You won't break them, and they will save you like $40, and extremely easy to install; however, I strongly urge you to use an engine hoist for safety...there is no flat surface at the bottom of the engine where a jack can be placed...unless you intend to damage your oil pan.
[Modified by Rockn-Roll, 7:44 PM 4/24/2003]
You won't break them, and they will save you like $40, and extremely easy to install; however, I strongly urge you to use an engine hoist for safety...there is no flat surface at the bottom of the engine where a jack can be placed...unless you intend to damage your oil pan.
[Modified by Rockn-Roll, 7:44 PM 4/24/2003]
Safety Car
Joined: Jun 2002
Posts: 4,844
Likes: 0
From: Pearland TX
St. Jude Contributor
Re: Motor mounts... (Pacin'California)
Be sure you get a set that is supposed to go on a Vette. I bought mine from Ecklers(Pt# 35849) and they are a direct replacement from the stock motor mounts. Not cheap at $79.95/pair, but when I dropped the new engine in a bolt would slip right in to lock them to the frame. Your stock bolt will not work as it will be too long. Thinking I went with 7/16" x 3 1/2"lg and lock nuts.
Can't give you any advice about doing it while the block is still in the vette. I would think the passenger side would be easier though as the power steering pump on the driver's side gives alot of interference.
Can't give you any advice about doing it while the block is still in the vette. I would think the passenger side would be easier though as the power steering pump on the driver's side gives alot of interference.
Safety Car
Joined: Aug 2000
Posts: 3,909
Likes: 26
From: Clymer PA
Re: Motor mounts... (Rockn-Roll)
Rockn-roll:
I'm with you on this one. I also went with Moroso solid motor mounts and a Moroso solid tranny mount. You will never break the solid motor mounts, holds the motor as secure as possible, don't have to worry about them down the road and they are a good bit cheaper than Poly. I picked mine up off of a friend for $20 brand new. I think they are about $20-$25 brand new. The only disadvantage is a little more vibration...but honestly I don't even notice it. Installing my motor mounts was a breeze.
I'm with you on this one. I also went with Moroso solid motor mounts and a Moroso solid tranny mount. You will never break the solid motor mounts, holds the motor as secure as possible, don't have to worry about them down the road and they are a good bit cheaper than Poly. I picked mine up off of a friend for $20 brand new. I think they are about $20-$25 brand new. The only disadvantage is a little more vibration...but honestly I don't even notice it. Installing my motor mounts was a breeze.
Safety Car
Joined: Jun 2002
Posts: 4,844
Likes: 0
From: Pearland TX
St. Jude Contributor
Re: Motor mounts... (1bad69)
someone told me that with the solid mounts you get more torque to to the wheels.....true or false?
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Instructor
Joined: Apr 2003
Posts: 248
Likes: 1
From: Kansas City MO
Re: Motor mounts... (bgrice)
"Initial" torque I would agree as your engine is trying to twist itself when you nail it and anything that flexes just softens that torque curve and the load to the back.
I've heard of a lot of people recommending a solid mount on the driver side and a poly or rubber on the passenger side since the elastics have less stretch resistance than compression resistance. That way you get a lot less motor movement but still some shock absorbsion.
That's what I'm going to do with my T/A since I just pulled my driver side motor mount apart doing a neutral drop. :bb
[Modified by Black Snowman, 12:26 AM 4/25/2003]
Race Director
Joined: Mar 1999
Posts: 10,258
Likes: 1
From: Calif.
Re: Motor mounts... (Rockn-Roll)
I have the pair of the 1/4" mounts in the garage. If any of you have a Chevy other than a Corvette, I might part with them if you pay the shipping. Or, if you want to try them on your year Corvette, pay the shipping and they're yours. But I don't want 'em back because I can't use them...
Melting Slicks
Joined: Dec 2000
Posts: 3,407
Likes: 2
From: Carmichael CA
Re: Motor mounts... (The Dude)
The other side didn't--the mount-to-pedestal holes would not line up to get the bolt through. The 1/8" thick version is drilled differently and installed with no problems.
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
Re: Motor mounts... (Corey 68)
You guys may have had the good sets or they pulled the normal routine again and send the junk overseas cause I had to shim mine out A LOT (for motormounts) to make them fit and I still had to do a lot of hammering, prying cursing and beer drinking to get them in.
I have my engine on a bare frame and can't imagin having pulled it off on a complete car.
I vote for tthe title: WORST AFTERMARKET "PERFORMANCE" PART EVER and should've gone with the moroso solids
Marck
I have my engine on a bare frame and can't imagin having pulled it off on a complete car.
I vote for tthe title: WORST AFTERMARKET "PERFORMANCE" PART EVER and should've gone with the moroso solids
Marck
Safety Car
Joined: Aug 2000
Posts: 3,909
Likes: 26
From: Clymer PA
Re: Motor mounts... (1bad69)
1bad69:
Solid mounts are very popular amongst drag racers for consistancy sake. There is torque of the motor on the motor mounts so the torque of the motor stays as consistant as possible. Some might consider it trivial, but in drag racing anything counts.
Solid mounts are very popular amongst drag racers for consistancy sake. There is torque of the motor on the motor mounts so the torque of the motor stays as consistant as possible. Some might consider it trivial, but in drag racing anything counts.
