Head gasket question

[Steve885]

I put a new head on Saturday. But realizing I didn't do the oil port mod for a 1g 7 bolt head on a 6 bolt block.
It been torked. My question is can I take the head back off and reuse the gasket safely. Any advice is mucho apparition thanks.
And to clarify there is a small oil galley around 1 stud the head came not fitting 12mm studs I drilled them out to 12.10 but I guess 1 of them is supposed to a full 1 mm bigger. /ubbthreads/images/graemlins/dunno.gif

 

[prove_it]

What kind of gasket is it?

If it's a MLS you should/might be ok as long as it hasn't ran. Really depends on how nervous you feel about it.

 

[maxash0775]

I personally would replace it because I would obsess over it being ok.

 

[iceman69510]

If it is stock style gasket, it gets crushed by torquing. It might be ok if it has not run, but is it worth is for $30 as one poster suggests (do you want to worry about it?)?

 

[EHmotorsports]

Replace the gasket

 

[CutlassJim]

Yes replace the gasket. But on the other hand you don't HAVE to do the oil port mod. It's more for really decked heads. People didn't start doing it till a few years ago and have been doing head swaps for 20 years.

 

[Steve885]

The oil port mod on a 7 bolt 1g head seems to make a lot of sense. The head came with what I think are 11 mm bores for the studs used on a 7 bolt block.. the head studs for ( at least least ARP were 11.99) for the 6 bolt block they wouldn't work at all so I bored all holes to 12.10mm. I'm my reading I saw a thread that explained there was a oil galley in the left closest to the front stud that feeds the turbo and the lifters. So I started stressing about it and pulled the head back off to drill that passage to a full 13mm required for flow.. now I fill better..and I've ordered a new gasket

 

[prove_it]

If you feel better, then you did it right.

 

[CutlassJim]

Quoting Steve001:
The oil port mod on a 7 bolt 1g head seems to make a lot of sense. The head came with what I think are 11 mm bores for the studs used on a 7 bolt block.. the head studs for ( at least least ARP were 11.99) for the 6 bolt block they wouldn't work at all so I bored all holes to 12.10mm. I'm my reading I saw a thread that explained there was a oil galley in the left closest to the front stud that feeds the turbo and the lifters. So I started stressing about it and pulled the head back off to drill that passage to a full 13mm required for flow.. now I fill better..and I've ordered a new gasket



The oil port mod is radiusing the turn into that hole. Which I was saying was not %100 necessary. More for shaved heads. Having the stud hole large enough is another issue. I always just use a 1/2" drill bit.

 

[Jason G.]

FTR, I've reused a MLS HG before on a couple different occasions.