Alum or iron heads.. which do i have?

[SpaceGoat]

I did the magnet thing and it didnt stick, but the cover suggests its cast iron (two bolts at opposite corners).. I doubt i have aftermarket heads. Anyone have pics so i can verify before i buy the parts i need. Thanks

 

[militant_x]

I think any of the following say aluminum heads.

1. Angled spark plugs.
2. Pull the oil cap, if they are the 86/87 aluminum heads the last three numbers (vissible) will be 128.
3. If you have centerbolt valve covers. (this one Im really not sure on this, I know the f-bodys have centerbolt and iron heads. But i think the centerbolt vettes were all aluminum)

Best bet is with the numbers.

Later,

-Chris

 

[bossvette]

If the magnet doesn't stick it is most likely Aluminum, pull the valve cover, cast iron will be dull grey while Aluminum will be silver to be sure.

 

[Tuna]

One of my books says that only the early production 86's got the iron heads before all production engines used the aluminum head.

 

[c4cruiser]

In 86, aluminum heads first went on convertibles only. The coupes got them late in the model year.

 

[geekinavette]

If a magnet don't stick to it, it ain't iron...period.

Bill