?'s About Timing Chain
Record Breaker
Joined: Nov 2009
Posts: 1,044
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From: Leesburg, IN
100% TRUE. I manufactured plates until it was pointed out to me that the bolt length is too long to achieve proper clamping force. The 'dissimilar metals' theory is bunk. All you need is shorter bolts and clean metal surfaces. Apply a thin layer of black rtv to both sides of entire gasket.
Save your money and help stop the plenum propaganda.
Save your money and help stop the plenum propaganda.
Thanks
Dave
Professional
Joined: Jul 2013
Posts: 142
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From: North of Amarillo
1/4-20 x 3/4
If you have a vise and grinder you can grind off the unthreaded nipple on the tips of the bolts and get to the right length.
If you have a vise and grinder you can grind off the unthreaded nipple on the tips of the bolts and get to the right length.
Banned
Joined: Jul 2010
Posts: 123
Likes: 1
many years ago i put the shorter bolt theory to the test and it did not work.3/4 bolt is to long and will bottom out as the oem is only a 1/16 longer but not threaded all the way as a standard bolt would be.i used 1/2 bolt and it torqued down perfect but again it did not work cause the root cause of the plenum is the two diff metals expanding and contracting at a diff rate.in fact aluminum expands/contracts twice that or 2x the rate as iron.oem metal plate is sawing at the plenum gasket pushing said gasket out very similar to a head gasket being sqeezed out.thats the reason mopar and fel-pro designed a metal/metal core gasket.for the price of a aluminum plate its worth the peace of mind that this proven repair will not fail.
Administrator
Joined: Apr 2010
Posts: 87,467
Likes: 4,220
From: Clayton MI
many years ago i put the shorter bolt theory to the test and it did not work.3/4 bolt is to long and will bottom out as the oem is only a 1/16 longer but not threaded all the way as a standard bolt would be.i used 1/2 bolt and it torqued down perfect but again it did not work cause the root cause of the plenum is the two diff metals expanding and contracting at a diff rate.in fact aluminum expands/contracts twice that or 2x the rate as iron.oem metal plate is sawing at the plenum gasket pushing said gasket out very similar to a head gasket being sqeezed out.thats the reason mopar and fel-pro designed a metal/metal core gasket.for the price of a aluminum plate its worth the peace of mind that this proven repair will not fail.
Banned
Joined: Jul 2010
Posts: 123
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Wrong. The two metals theory has been disproved multiple times here. If you couldn't get a steel pan to seal with shorter bolts, and a good gasket, then it would be the workmanship I would question. I went and did the math on the 'dissimilar metals' theory, and the movement was measured in ten thousandths of an inch. Not enough to make any difference whatsoever.
Administrator
Joined: Apr 2010
Posts: 87,467
Likes: 4,220
From: Clayton MI
your math and advise has no experience actually working on 2nd gens only copy paste from what you have read.i actually wrench on my ram and have done alot of modifying/testing first hand so my math and advise workmanship come from experience working on my ram not from reading it.
Banned
Joined: Jul 2010
Posts: 123
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i apologize if the truth hurts so dont throw rocks and not expect them to be thrown back with experience