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-   -   sbc torque list (http://www.hotrodders.com/forum/sbc-torque-list-172843.html)

sooper 02-11-2010 08:45 AM

sbc torque list
 
Anyone got a complete or near complete list of SBC torque values? I mean the whole wazzoo. . engine mounts,head bolts,ring gear etc etc all in kind of list. Sick of scrounging for a number here and one there and all over like that

cobalt327 02-11-2010 09:20 AM

Quote:

Originally Posted by sooper
Anyone got a complete or near complete list of SBC torque values? I mean the whole wazzoo. . engine mounts,head bolts,ring gear etc etc all in kind of list. Sick of scrounging for a number here and one there and all over like that

You need to pick up a factory manual.

Here's my contribution:

Small Chevy

Fastener Type Torque Spec

7/16 in. outer main cap bolt 65 ft.-lbs.
7/16 in. inner main cap bolt 70 ft.-lbs.
3/8 in. outer main cap bolt 40 ft.-lbs.
11/32 in. connecting rod bolt 38-44 ft.-lbs.
3/8 in. connecting rod bolt 40-45 ft.-lbs.
Cylinder head bolts 65 ft.-lbs.
Screw-in rocker arm studs 50 ft.-lbs.
Intake manifold bolts (cast iron heads) 30 ft.-lbs.
Oil filter adaptor -20 x 1-1/4 long 8 ft/lb
Oil pump bolt 60-70 ft.-lbs.
Cam sprocket bolts 18-20 ft.-lbs.
Harmonic damper bolt 60 ft.-lbs.
Flywheel/Flexplate bolts 65 ft.-lbs.
Pressure plate bolts 35 ft.-lbs.
Bell housing bolts 25 ft.-lbs.
Exhaust manifold bolts 25 ft.-lbs.

1BAD80 02-11-2010 09:25 AM

It's in the Knowlegde Base.

sooper 02-11-2010 12:14 PM

Quote:

Originally Posted by 1BAD80
It's in the Knowlegde Base.

for the 3 bolts that hold motor mounts on each side?

ap72 02-11-2010 12:28 PM

Quote:

Originally Posted by sooper
for the 3 bolts that hold motor mounts on each side?


For those I always go with "really friggan tight." Seems to have worked so far...

sooper 02-11-2010 12:39 PM

Quote:

Originally Posted by ap72
For those I always go with "really friggan tight." Seems to have worked so far...

Geez ya. Standing there with a pile of shavings of cast from a stripped out block thread on an 8G motor would certainly be a highlight, or did I just mean to say HE!! NO FRIKIN WAY. Ya it mighta been the latter. I'll get some torque values but thanks the same

cobalt327 02-11-2010 01:16 PM

Quote:

Originally Posted by sooper
Geez ya. Standing there with a pile of shavings of cast from a stripped out block thread on an 8G motor would certainly be a highlight, or did I just mean to say HE!! NO FRIKIN WAY. Ya it mighta been the latter. I'll get some torque values but thanks the same

EZ!

In cases like that, you go by the bolt grade and thread pitch.

But I'm w/Ap on this- I've NEVER torqued the motor mount or clamshell to the block. And I've never stripped a hole or bolt, or had one loosen up on me either.

Ever tried to get a torque wrench on ALL the intake bolts on a Gen I SBC- w/o a crows foot, etc.?

1BAD80 02-11-2010 01:39 PM

Why is it no one wants to help themselves and wants the answer without looking or reading.

If you cant find what you want use the chart for the size of the bolt,
That is why there is a Knowledge Base on the site.

Like my Father used to tell me
"If You Ever Need A Helping Hand, There is One At The End Of Your Arm"

site with torque values,
http://www.portlandbolt.com/technica...FRDxDAodqhzHYA

artsvettes 02-11-2010 02:33 PM

Here is one for ya

http://boxwrench.net/specs/chevy_sb.htm

1BAD80 02-11-2010 03:38 PM

Thank's, That one has been in the Knowledge Base over a year. :thumbup:

PRHeloPilot 01-12-2013 08:47 PM

I love the search function of this site. After reading about different 12 threads I found this one and found what I was looking for and both on the same page: Torque values for simple things on my SBC (header bolts, oil pan, valve cover) and spark plug firing order, awesome! Thanks guys !

cobalt327 01-13-2013 08:07 AM

Here's another one for the list (work in progress).

PRHeloPilot 01-13-2013 08:17 AM

Nice ! What I haven't found yet is for the carburetor. I'm going to remove it to paint the intake manifold and still haven't found how much torque to tighten the nuts when I replace it.

After reading your page I noticed the thread sealant. Do I need to use High Temp (Permatex High-Temperature Thread Sealant) or Regular sealant (Permatex Thread Sealant with PTFE) for the 4 bolts that hold the water pump to the engine?

cobalt327 01-13-2013 09:04 AM

Quote:

Originally Posted by PRHeloPilot (Post 1634228)
Nice ! What I haven't found yet is for the carburetor. I'm going to remove it to paint the intake manifold and still haven't found how much torque to tighten the nuts when I replace it.

After reading your page I noticed the thread sealant. Do I need to use High Temp (Permatex High-Temperature Thread Sealant) or Regular sealant (Permatex Thread Sealant with PTFE) for the 4 bolts that hold the water pump to the engine?

Yes- on the bolts that go into the water jacket.

Carb to intake torque is about 15-20 ft/lb for a 5/16 fastener. Use no more than 12-15 ft/lbs (spec is 144 in/lb) on the long through-bolts if bolting on a Q-jet or the casting can warp.

If you're using a thick insulator gasket, retorque until it takes a set, don't overtorque it hoping to make it stay tight.

I always recheck the carb to intake bolts on a new build along w/the intake to head and header fasteners after every heat cycle until everything settles in.

Truth be told, you can just tighten the fasteners by feel- snug them down plus "a little bit".

cobalt327 01-13-2013 09:08 AM

I'd use a sealant (either will do of the two you mentioned, just not RTV). That area of the block doesn't get much hotter than the coolant temp, so unless the "low temp" sealer is below 350 degrees or so it should be fine.


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