equandt

iTrader: (2)

I just got my GTP S2 heads. They are 853 castings.

I found something in the intake port that I found unusual. The threaded hole for the intake rocker is open into the intake port, creating a hole in the side of the port. Is this correct. This hole is present on all eight intake ports so I assume it is correct.

Does the rocker arm bolt seal this hole when the rocker arm is installed?

Can this hole cause a vacuum leak or cause oil consumption problems by allowing oil to get into the intake port or will the rocker arm bolt seal the hole?

Thanks.

Viper

iTrader: (6)

Use locktite on the rocker arm bolts. There's another post asking the same question on this page.

equandt

iTrader: (2)

Doh! Now I feel like a dumb ***.

Thanks.

1fastWS6

iTrader: (3)

I used teflon thread sealer. Didn't want the bolt to get seized up in there using loctite. They're hard enough to get loose sometimes as it is.