Broken Motor Mounts
Drifting
Joined: Jul 1999
Posts: 1,542
Likes: 43
From: Plano TX
I've had numerous types of non solid motor mounts break over the years. Always made sure I put the cross bolt from the side that allows me to remove it easily.
I now run nothing but solid mounts. While they add a bit of vibration and noise it's not bad at all so one of the cheapest performance improvements. It tighten up the chassis so another big plus.
I now run nothing but solid mounts. While they add a bit of vibration and noise it's not bad at all so one of the cheapest performance improvements. It tighten up the chassis so another big plus.
Melting Slicks
Joined: Jun 2002
Posts: 2,844
Likes: 99
From: Orrtanna Pa.
So,....is it out yet? I just love to see the engine hanging on the picker!
Last edited by The Money Pit; Nov 22, 2011 at 11:09 AM.
Thread Starter
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Burning Brakes
Joined: May 2009
Posts: 1,232
Likes: 6
From: Tucson AZ
St. Jude Donor '12
62500 thickness = .25"
62530 thickness = .188"
I think it looks like I have 62500's
Last edited by RobbSalzmann; Nov 22, 2011 at 01:40 PM.
Burning Brakes
Joined: May 2009
Posts: 1,232
Likes: 6
From: Tucson AZ
St. Jude Donor '12
Safety Car
Joined: May 2004
Posts: 4,351
Likes: 1,578
From: los altos hills california
gkull: I would like to verify that you actually broke the energy suspension motor mounts. I called them before I installed a new motor and they claimed that they had a "patented interlocking mechanism" that would prevent the motor from over rotating so I went ahead with that assurance. Now ... I am not so sure that was good enough.
I had previously broken the stock mounts and the only clue was a little nick in the upper radiator hose. Now how did that get there I wondered? Holy Sh.., that's pretty scary, once I figured out the fan was hitting the hose.
Right now the body is off and it is relatively easy to do the right thing
I had previously broken the stock mounts and the only clue was a little nick in the upper radiator hose. Now how did that get there I wondered? Holy Sh.., that's pretty scary, once I figured out the fan was hitting the hose.
Right now the body is off and it is relatively easy to do the right thing
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Burning Brakes
Joined: Sep 2009
Posts: 1,124
Likes: 140
From: Western New York
As far as the old chain rig goes for limiting engine movement, that wasn't really a "Bubba" trick. GM used it back in 1967. I had a '67 Camaro SS350 that got a recall for bad mounts. Took it to the dealer and they attached a kit that had a mount that went over the engine mount and was then secured with a short cable with an eyelet crimped on each end. When I changed the mounts, myself, I saved the kit and still have it on the shelf somewhere. It was a weird contraption. Would have been easier for Chevy to just change the mount.
Duane
Duane
Safety Car
Joined: May 2004
Posts: 4,351
Likes: 1,578
From: los altos hills california
I did a little more exploring on the energy suspension website and found this picture of their mounts showing the internals
I have what they call here the early style. It looks like one U shaped bracket is locked around another at right angles. This would seem to be pretty safe so I remain curious as to how they broke and whether I should be concerned.
I have what they call here the early style. It looks like one U shaped bracket is locked around another at right angles. This would seem to be pretty safe so I remain curious as to how they broke and whether I should be concerned.
Thread Starter
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
It is enough engine movement to lift my headers into the steering rag joint
Last edited by gkull; Feb 29, 2012 at 07:27 PM.
Safety Car
Joined: May 2004
Posts: 4,351
Likes: 1,578
From: los altos hills california
That alleviates my concern that there's a serious safety issue. I was going to pull them out and insert a bolt but I don't think that improves anything. I would mail the mount in to their tech guys and if they are at all responsible they will figure out why this happened.
thanks for the update!
thanks for the update!
Burning Brakes
Joined: Feb 2001
Posts: 929
Likes: 5
From: Marietta GA
I have a big block with headers and run ES poly motor mounts. After my drivers side melted I bought the motor mount shield intended for vehicles with air conditioning. I installed the shield on the driver side along with a fresh motor mount, a few years later I noticed the passenger side was melting too, so I bought another shield and installed it and a fresh mount on the passenger side too. This has totally solved the melting/softening issue.
Last edited by BB68Vett; Feb 29, 2012 at 07:04 PM.
Safety Car
Joined: May 2004
Posts: 4,351
Likes: 1,578
From: los altos hills california
Thanks BB68, I think you just saved me some future grief. I didn't know such a part existed but I found one at CorvetteAmerica. If the factory created such a part I have to assume they did it to fix an ongoing problem. To use that part I'd have to lift the motor a bit to install the mount.
But .. take a look at my situation
This is an LS3 iron exhaust manifold and it really is pretty close to the mount. Conveniently there is a threaded tab as part of the manifold that already holds an outer shield. Looks like all I have to do is put a shield on the inside similar to what GM provided. I can probably use that machined boss on the block for additional support. The passenger side is pretty similar.
Alternatively, the MM through bolt has the nut on the backside and I can fashion a shield to mount there. I'll play with it and see what looks best.
Cool (literally) and thanks
But .. take a look at my situation
This is an LS3 iron exhaust manifold and it really is pretty close to the mount. Conveniently there is a threaded tab as part of the manifold that already holds an outer shield. Looks like all I have to do is put a shield on the inside similar to what GM provided. I can probably use that machined boss on the block for additional support. The passenger side is pretty similar.
Alternatively, the MM through bolt has the nut on the backside and I can fashion a shield to mount there. I'll play with it and see what looks best.
Cool (literally) and thanks
