3.0 Mercruiser head blots

[cproc501]

Can anyone tell me if it is reccomended to replace the head bolts when re-installing a head on a 3.0 4cyl? Also what is the final torque ft lbs? Thanks!

 

[Bt Doctur]

Re: 3.0 Mercruiser head blots

to 90lbs in 3 steps, retorque after 20 hrs.
the head bolts that follow the straight portion of the valve cover gasket9,5,1,4,8,
the bolts with the curved portions 10,6,2,3,7


10 6 2 3 7

9 5 1 4 8

 

[atomb]

Re: 3.0 Mercruiser head blots

reccommended yes necessary ...I dont think so. I reused mine but they were in good shape not rusty. They are yield to to tighten bolts . So in reality you should use new ones which would be the right answer. I think they are like 5 dollars a bolt new

 

[Dsilvers112]

Re: 3.0 Mercruiser head blots

good possibility they are stretch bolts if so yes they need to be replaced

 

[achris]

Re: 3.0 Mercruiser head blots

Neither the service manual nor the parts listing say anything about replacing the head bolts. Reusing them is ok....

And as the man said, 90lb.ft.

 

[cproc501]

Re: 3.0 Mercruiser head blots

Thank you all for your input!