89 Iroc Z

I am assembling a set of 113 ZZ4 / Corvette Heads with LT4 spring components (springs, shims, retainers, and locks). I am using GM studs made for use with guide plates.

1st Question:
I bought the valve stem seal kit part number 12511890 and it comes with 2 sets of exhaust seals one set is black one set is natural color. Which ones do I use?

2nd Question:
Should I use locktite on the rocker studs? If so what type (red,blue,green?)

3rd Question:
I am using a .051 ZZ4 head gasket and stock GM head bolts. After I torque them down to spec do I need to retighten them after I run the engine for a short while?

Here is a picture of the valve seals and other stuff going on the heads.

ede

i use red loctite, no need to retorque unless it makes you feel better. no idea about 2 sets of exhaust seals, my guess is either would work if they're both for the exhaust.

Vader

Don't quote me, since I can't recall with any certainty, but as I remember the seals with the white stripe are for the exhausts, and those with no stripe are intakes. There should be a data sheet packed with the gasket set indicating the correct position.

89 Iroc Z

I found this on a piece of paper that came in the package....
It seems I need to use the natural colored ones since it is a car but the last sentence confuses me. Are corvette heads .030 over?