mrmint69

I want to install the header with header bolts into the aluminum heads. Do i use antiseize, thread lock or what? I am not sure what the rule is on bolting something into aluminum. The kit didn't come with anything but the bolts. Do i need washer or lock washers for the install?

ACE1252

Generally, my understanding is that when two different metals make contact there is an electrolytic reaction between them. That can cause the two metals to "weld" together over time. A long time from now, when you go to move one of them, the weld breaks, and the rough edges can then cause galling.

So, I would suggest using the anti-seize.

As far as the lock washers...I'm not sure, but there are some type of special bolts for headers that are designed not to back out....I just can't remember the name.

Bud M

I used anti sieze with Stage 8s. Not sure how good of an idea it is with regular bolts.

OBE1 95Z28

Antiseize and regular bolts work fine. Just be sure to re-tighten the bolts after a few thermal cycles.

Z28SORR

Always, always use antiseize in aluminum. Even better would be high temp. antiseize for the exhaust.

Dave88LX

Antisieze!

chevytuned

All ways use antisieze if you are putting steal bolts into alum. How ever the bolt holes that you are putting the header bolts in should have helecoils in them so it wont mater if that is the case but it wont hurt if you do. Just go back after it heats up and cools down a few time and tighten them back up they should be fine. I also would stay away from paper gaskets use alum. or the copper gaskets I have ran both with no problems. Good luck.

dfa_crunch

previous owner did this to my car, when i went to remove the headers, bolt snapped inside the head, top half came out, other half was left inside the head.

not fun

Dtimekw

Galvanic corrosion is the term for dissimilar metals that have reactions to each other. The further the two metals are from each other on the galvanic scale, the more problems you'll have. Steel and Aluminum are not very close, plus, one is ferrous and the other is non-ferrous. That is where anti-seize comes in. Be mindful of which one you use. Anti-seize comes in several different flavor, copper, zinc, hi-temp etc... Read the labels and be sure they are compatible with aluminum and steel. Hope this helps.