Gisys

How to tell the difference between cast iron and aluminum heads?

Here are some pictures. I FEEL 100% retared on this one thanks for any help you can give.

toomany

I'm going to say cast iron because of the rust on them.

Shadow Z

iTrader: (2)

Pull off the valve covers and get the cylinder head casting number. Well, only pulling one of is necessary. That will give you a lot more useful information than just the material type.

Although, they have to be iron. Aluminum does not rust like iron will. Aluminum is not a ferric material, so it will only oxidize. Basically get very dull.

Here's some SBC head casting numbers.

http://www.kendrick-auto.com/chevrol..._number_re.htm

Hope I helped you out.

cuisinartvette

Magnet wont stick to aluminum

///DAN///

iTrader: (1)

they would be cast my friend it's pretty hard to confuse, cast look like that and aluminum look like well aluminum .

Gisys

Thanks for the help guys. Not going to pull valve covers off today but will keep that in mind for when I do if ever. Just trying to get the right spark plug and felt like having another opinion.