Hey what's up guys!
Time to refresh the motor. Do you guys know of a website or place I can get information on the torque specs for the head bolts and intake bolts.
I only torqued the head bolts to 36 lbs and they have backed out. Does this sound about right as far as ft lbs?
Any info would be greatly appreciated so I can stop driving a pinging truck,
thanks.

 

There are four steps to torqueing the head bolts.


Step one- All 11mm bolts 22ft lbs

Step two- All 11mm bolts turn an additional 90 degrees


Step three- 11mm bolts (1 through 8) turn an additional 90 degrees
11mm bolts (9 and 10) turn an additional 50 degrees


Step four- All 8mm bolts 22ft lbs


did you do them in the right sequence? This info is right out of a tech manual. Also did you use new bolts because the head bolts are not reusable.

 

This website has most of the specs you'll ever need.

www.ls1howto.com.com

 

Thanks for the link, it will be very helpful.


KLUG'S SS - I reused the old bolt cause none of them were broken , My mechanic says to just put 5 extra lbs on each bolt. Thanks for letting me know about the sequence though!


Another question though! The spec sheet says 44lbs 1st pass and 89 lbs 2nd pass. Isn't that a bit too much for plastic intake manifold?

 

DO NOT RE-USE HEAD BOLTS!

As for the intake manifold, that's inch/pounds not foot pounds.

 

Why not?

So just divide the 44 and 89 by 12

 

Our head bolts are "torque to yield" bolts that have a certain amount of stretch to them. That "stretch" is reached when they are torqued down the first time they're used. The head bolts do not return to their original state after this. In re-using them you are risking uneven torque pressures across the head or you may even break off a head bolt in the block. Definitely not worth trying to save a few bucks. Now, head studs are re-useble and make the job much easier and cleaner.

 

You don't divide the 44 and 89 by 12, it is just 44in lbs and then 89in lbs. Also silent1 put it perfect perspective for the head bolts if you continue to reuse them they are going to keep backing out on ya.

 

ok, I'll get new head bolts when I get my new heads in then.

 

We have reused head bolts a few times and never had a problem yet.How often have you guys hear of someone breaking a head bolt?The only reason they backed out because he did not tq them enough the first time.