Head gaskets and bolts

[Los_Control]

18 hours ago, Frank Gooz said:

With all talk above about thread sealers on bolts that going to the water jackets. what about head bolt torque with any of these tape or liquid on the threads.

Is there an add to the torque needed to be 65 to 70 LBS. ?

 

Thank you

IMHO neither one will change the torque specs. I like to clean the bolt threads with a wire wheel, run them into the block a few times to clean the block threads.

I feel the sealer, thread or pipe dope would interfere at maybe 20 pounds, by the time you get to 50 pounds it no longer matters.  Get to final torque and redo it 3 times after running the engine,  it wont matter.

 

 

 

[Sniper]

According to Antiseize,

 

https://www.antiseize.com/PDFs/torque_specifications.pdf

 

Reduce the torque values 25% for lubricated fasteners

Definitions: Lubricated means coated with a lubricant such as engine oil, thread sealant or threadlocker.

 

Now that is for dry torque values, if the FSM specifies them for wet torque values then no change.  My FSM specifies that all the threads, except the three that go into the intake ports, be coated with a sealer.  It does NOT specify a different torque value for the coated vs uncoated bolts, though it's been my experience that the newer FSM's expects you to use SAE 30 oil to lubricate the threads unless otherwise specified.  If this is so for the older manuals then there is no need for a different torque value as all the bolts with be wet.