I'm looking to get some stainless arp bolts for the thermostat housing, is the Pontiac bolts the same size as olds? or anybody have a lead on some nice stainless bolts I can use thanks.

Here is the Pontiac set:

https://www.summitracing.com/parts/arp-490-7402

 

I don't know what might be available north of the border, but here in the US my local Tractor Supply sells stainless fasteners by the pound. This is not exactly a highly-stressed structural joint. I doubt you need to pay ARP prices. On some manifolds, these holes are open to the coolant passage on the bottom, so use anti-seize. The gasket will prevent leakage, so you don't need teflon paste on the threads.

 

Its dosent have to be ARP but they make good stuff, do you happen to no the size of bolt to track down at tsc? and this will be going on my rpm intake thanks.

 

I believe they are 5/16-18.

 

Thanks alot Joe I had a pack of ARP bolts for something I bought, they didnt work out, think it was going to be for my perfect launch diff cover, but they are the size you mentioned, I guess I will use those.

 

Good idea. I reinstalled a thermostat and a new thermostat housing gasket yesterday. The bolts were pretty nasty looking even though I had cleaned them recently.👍

 

why not use studs in place of the bolts. i do

 

that's a good idea, but I have the bolts on hand

 

cut the heads off

 

Those ARP bolts are bad@$$. Make sure you show us an after pic.

 

Make sure you have enough length into manifold as to not pull threads out.Those bolts look short.

 

Your sir are correct, so I guess I will have to get longer bolts or studs.