I'm looking at these bolts and have some questions:

WATERPUMP BOLTS
I see black RTV sealant on the bolts and at the edge of the holes in the bolck with the pump removed. Did GM put RTV sealant on the threads or just the bolt shaft? The bolts shafts also have some black on them and Im not sure if this is just possible electrolysis type effects or the remain of RTV.

INTAKE BOLTS
Do these bolts require some type of sealant? Im not sure where the bottom of these holes go into the block. Is it the water jacket or and oil passage or do they go nowhere?

Appreciate any replies.
Brent.

 

Neither need to be sealed. If the water pump bolts have sealer on them. Someone had it apart and didn't know better...The bolts do not go into any passages.

 

I use liquid teflon on the water pump bolt so the bolts (metal) don't get locked into the block if it is aluminum, even metal to metal is a good idea. Just a precaution for disassembly later. Right up there with anti-seize on the spark plug threads.

Intake bolts never seem to have an issue.

 

We don't use sealant on either one. You could use some anti-seize on the waterpump if ya wanted but it shouldn't have a problem.

Jon

 

Perfect. Thats for all the replies.