R&R heads on 1984 500 sel V8 - W126
 

Anybody remember if headbolts are different sizes?... manual says all are 10mm -with different lengths- but mine appears to have some [4 each head] larger headed [head of bolt is size of nickel maybe?] with size of 12mm hex. Two manuals and parts lists make 10mm only claim. anybody have experience with this difference?

Thank you!

bump and see photo.

the two red arrows are head bolts and the blue arrow points to one hidden by exh. manifold.

But is the brown arrow one also? It is different size hex.

The bolt pointed to by the brown arrow is not a head bolt. I believe it is some sort of plug. All the head bolts on my 84 500 SEL are 10mm except for 3 smaller bolts close to the cam chain.

thanks Paul. Means a lot!