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Motor mount clamshells

Old Dec 9, 2017 | 06:48 PM
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Default Motor mount clamshells

Ok so I'm good on getting to the motor mounts. I'm just wondering how much of pain is it to open up the stock clamshells and put polys in. I'm going to have the engine out completely and I don't want a big hang up to be drilling out and putting the poly mounts in the shells. Is it really just 4 rivets open POOF bolt closed
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Old Dec 9, 2017 | 07:34 PM
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Yes it really is. When you bolt them back together, make sure you know which way is inboard and outboard or the bolts will interfere with the block
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Old Dec 10, 2017 | 03:10 AM
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my advice....the big rivets ( 2 of em )....drill a small hole thru each rivet....then drill a bigger hole....then use a step bit ...on the non riveted holes go straight to the step bit and take it out to 3/8 on all 3 holes.....you need to get all the holes enlarged to 3/8 for the bolts....I use 5 3/8 grade 8 bolts....3/4 long with washer and crimp locknut .....3 on the rivet side...2 on the other side ..use waterproof grease on the poly mounts to help when squeezing the metal clams together ..I am using prothane mounts ( pic not of final product )





Last edited by sjsingle1; Dec 10, 2017 at 03:19 AM.
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Old Dec 10, 2017 | 08:10 AM
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It is pretty straight forward. There will be 5 areas on each shell to drill out. Things I would recommend having handy:

1) torch to heat up the shells after you have gotten the rivets out. The stock rubber will stick to the shells halves so you may need a pry bar as well.
2) drill with wire wheel attachment. There likely will be rubber left stuck to the inner of the shells even after using heat.
3) rubber mallet to beat the new polys into the humped side of the shell.

Good luck, it can be a bit time consuming but it's easy.
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Old Dec 12, 2017 | 09:22 AM
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Originally Posted by Chevyy1212
Ok so I'm good on getting to the motor mounts. I'm just wondering how much of pain is it to open up the stock clamshells and put polys in. I'm going to have the engine out completely and I don't want a big hang up to be drilling out and putting the poly mounts in the shells. Is it really just 4 rivets open POOF bolt closed
if you haven't already bought the mounts dont get the energy suspension mounts. They come with zip ties to hold the clamshell together. Get prothane. Prothane comes with nice nuts and bolts to replace the rivets
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Old Dec 12, 2017 | 09:51 AM
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I grind the heads off and knock them out
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Old Dec 14, 2017 | 12:57 AM
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Originally Posted by 01ssreda4
I grind the heads off and knock them out
I grinded one....drilled the other.......drilling was faster




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Old Dec 16, 2017 | 07:22 AM
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Originally Posted by sjsingle1
I grinded one....drilled the other.......drilling was faster

But I like grinders more then drills so......
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Old Dec 16, 2017 | 07:53 AM
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So much more simple than it seemed looking through threads. Thanks alot just ordered them shouldnt add hardly any time to my engine swap looks like
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Old Dec 16, 2017 | 09:30 AM
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Originally Posted by Chevyy1212
shouldnt add hardly any time to my engine swap looks like
Just wait to you go align them up with the pedestal and engine.
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