General question: Head bolts on Monteros torque to yield?

[Longhawl]

General question: Head bolts on Monteros torque to yield?

 

[lev]

Gen 2 gasoline is standard bolts, diesel is torque to yield I think.

 

[nwoods]

On the 3.5L gas engine, it’s torque to 80ft lbs, back off, then retorque back to 80 ft lbs (page 11B-56 in the service manual)

Be sure to follow a standard cross-cross pattern for tightening. The manual shows this on page 11B-31

 

[PaydayGabe]

I have the torque pattern and values. The ultimate question is, ,
Can these head bolts be reused?
Or are they a "one time" use only?
I will be doing a valve job in the near future and don't want to go back into the engine, unnecessarily. Cheers,, G.

 

[evomaki]

That simple of a question deserves an answer. I have a hard copy FSM for the 2000 Montero, which has the 3.5 engine. And after looking closely in the manual, I can't answer your question. Says nothing about whether they are torque to yield. Maybe the omission is the answer (doesn't say they are torque to yield), but I just don't like making that assumption. I have not had the heads off. I would have suspected torque to yield, but that means nothing.

 

[PaydayGabe]

Thanks for your reply Maki
Will contact Mitsubishi dealer/service for an answer and report back. ?G.

 

[PacS14]

I personally wouldn't re-use head bolts. Why risk it when they are not super expensive.

 

[PaydayGabe]

I personally wouldn't re-use head bolts. Why risk it when they are not super expensive.

I've seen several Full Gasket sets w/ supplied head bolts.
Seems logical to replace.
Just needed confirmation.
Replacing ?.

 

[PacS14]

Keep the old bolts they always come in handy for other projects or to hold engines on an engine stand, etc.