Main Cap Torque Spec
Thread Starter
Racer
Joined: Feb 2000
Posts: 488
Likes: 28
From: Peabody MA
Main Cap Torque Spec
I'm in the process of putting the stock windage tray back on my 383 after I finish slotting some holes for the rod bolts to poke through because of the extra stroke.
My question is, what do I torque the the main cap bolts to? Normally I'd use the spec from my service manual but that was for the stock 2 bolt block - I'm using a GM bolt bolt block currently.
Any ideas?
-Mike
My question is, what do I torque the the main cap bolts to? Normally I'd use the spec from my service manual but that was for the stock 2 bolt block - I'm using a GM bolt bolt block currently.
Any ideas?
-Mike
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: Main Cap Torque Spec (Mike in Boston)
You got a 4-bolt now? I went through the same thing. For some reason 75 inner and and 50 outter are sticking in my head, but don't quote me. Maybe I can find it in the archives.
Team Owner
Joined: Mar 2000
Posts: 83,383
Likes: 87
From: Boston, MA
Re: Main Cap Torque Spec (scorp508)
http://forums.corvetteforum.com/zerothread?id=383273
http://forums.corvetteforum.com/zerothread?id=383275
Going back and reading now I think I ended up with 60 outter and 75 inner. I'll have to see if I can find a better post with my results.
http://forums.corvetteforum.com/zerothread?id=383275
Going back and reading now I think I ended up with 60 outter and 75 inner. I'll have to see if I can find a better post with my results.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: Main Cap Torque Spec (Mike in Boston)
My "Chevrolet Power" book says, 70 ft.lbs, inner, and 65 ft.lbs, outer, with "Molykote" as the lubricant, for an iron block. Good luck, and...
RACE ON!!!
RACE ON!!!
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Re: Main Cap Torque Spec (Mike in Boston)
The stock tray should fit without the rod bolts interfering if you use the correct stand-off main cap bolts.
I'm using the stock tray and only had to slot the tray's mounting holes because the 400 has different bolt spacing than the 350.
Jake
I'm using the stock tray and only had to slot the tray's mounting holes because the 400 has different bolt spacing than the 350.
Jake
Thread Starter
Racer
Joined: Feb 2000
Posts: 488
Likes: 28
From: Peabody MA
Re: Main Cap Torque Spec (JAKE)
For some reason spacing it down didn't occur to me until I had already finishing putting a few extra holes in it. It won't control the oil quite as well that way but it should be better than nothing. I'll see if I can find an unmolested one and just space it down.
Blah, I made more work for myself yet again.
Blah, I made more work for myself yet again.
Thread Starter
Racer
Joined: Feb 2000
Posts: 488
Likes: 28
From: Peabody MA
Re: Main Cap Torque Spec (CFI-EFI)
CFI-EFI was right on. I just called my engine builder and he said 70 for the long bolts (the inside and the end caps) and 65 for the short bolts (outside).
So tomorrow it goes back together.... again. :steering:
So tomorrow it goes back together.... again. :steering:
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