Gen I Cylinder Head Torque

[Jerry Dobson]

I was looking at my Gen I motor manual for Torque Specifications, it says:

Torque to 30ft pounds on the first round and then add 1/4 turn on the second. This does not sound correct. I was expecting 60 to 90 pounds total. Do all the manuals state this procedure?

 

[XLR8]

That is called a torque to yeild spec. It is used on heavy equipment among other things. You should torque the head bolts to 110 ft lbs as the final torque. The manual I have says 90 ft lbs but that is not enough for a good seal. Do not lube the threads, install the bolts dry.

 

[Steve-Indy]

Remember what the Viper Wizard said in this thread for NEW STYLE GEN I GASKETS and bolts:

http://vca2.viperclub.org/forums/showthreaded.php?Cat=&Board=UBB14&Number=332699&page=&view=&sb=5&o=&vc=1

"Yes that is what the book says, you end up at 95 ft lbs. Are your replacing your head gaskets with the new multi-layered steel gaskets? If so "Torque Sequence" as follows: 40 then 80 and final torque is 120 ft lbs!
1/4 turn is for the old gaskets! "

 

[Jerry Dobson]

Steve-Indy,

Thanks for the link. This is more like it. Yes I am using the Multi-Layer gasket.

Jack B talks about replacing the head bolts. Any problems with re-using the head bolts?

 

[Steve-Indy]

I would pop for new head bolts.

 

[ROCKET62]

Jerry,

Quick reminder - do not rotate the crank or yutn over the engine with the heads off as you risk breaking the seal on the Gen 1 wet cylinder liners.

Good luck with the change out of the gaskets.

 

[Jerry Dobson]

Rocket, Thanks for the reminder. I hope to have this project wrapped up soon.

Jerry