torquing head down

[hankthetank]

doing a turbo install and getting different answers on how to torque down the head with 3 gaskets. Whats the best way to do it?

htt

 

[Skydog]

Cross from center out. 38FT
I have heard from a few people that did 50lbs and pulled the stud out of the block!

This is how i did mine and the gaskets where dry.

Skydog

 

[TurboTony]

I did mine as per yamaha, something like 12 ft lbs plus 120 degrees? I can't remeber the specs off hand.

I'm using a headshim though, so that may make a difference

Tony

 

[Master of Faster]

I did it per the Yamaha specs as well, 14lbs + 121,105, and 140* depending on which bolt. Its page 5-20 in the service manual.

Haven't got to test yet, still waiting on...



...parts

 

[hankthetank]

skydog

20 nm=14.75 foot pounds
35 nm=25.81 foot pounds
50 nm=36.87 foot pounds

are these conversions correct if so i will use this method.

htt

 

[Master of Faster]

20 nm ~ 14ft lb

Here's the service manual page if it helps...

 

[Skydog]

They look good to me!