3100/3400 heads interchange

[bigalwalker08]

I bought a 99 Grand Am GT with the 3400 that was said to have a cracked head... I have a 97 3100 from a Monte Carlo that has a broken camshaft... Theoretically, I can put the 3100 heads on the GA 3400 right? I am not looking for any performance as its going to be my roomates first car...

[SappySE107]

Yup, just swap them over. You will have to use the small port intake gasket set so the lower fits, and then get large port upper gaskets. I have that kit on my store, as a hybrid set. I need to rename it because that confuses the 3400/3500 owners.

[bigalwalker08]

Link to your store?

[bszopi]

^ Click me!

[bigalwalker08]

So if I understand your post correctly Sappy, I need both these:

http://wot-tech.com/shop/all/large-port-intake-manifold-gasket-set/prod_118.html

And these:

http://wot-tech.com/shop/all/small-port-intake-manifold-gasket-set/prod_175.html

[SappySE107]

http://wot-tech.com/shop/all/small-port-intake-manifold-gasket-set/prod_175.html

I added the option of the large port upper gaskets and the 00+ EGR gaskets (you won't need the gaskets for a 99 upper since that is a direct swap to the 96-99 3100.

[bigalwalker08]

Ok Sappy, I am ready to check out in your store... However I need headgaskets and head bolts also... Since they are 3100 heads, I should get the 3100 head bolts and 3100 head gasket set also right? Or do I need to go 3400 on those? I havent done anything this custom before so I need all the help I can get... If this needs to be takin to PM it can...

[SappySE107]

You will want 3400 head gaskets for a 3400 block. The 3100 head gasket uses a smaller bore size. Head bolts are all the same minus 1 thing. most sets are all the same style bolt, and the monte carlo and some others use a set that has all the same style minus 1 bolt that has a nut on top for something else to bolt into.

If you need exhaust gaskets and such, the head gasket set might be the way to go to get the other parts needed.