603 head #
 

Just pulled a 603 head at junk yard, where is the #(17,22,etc) stamped?

Driver's side of the head, just above the #2 injector.

You'll see a set of casting numbers. Your looking for the second to last group of two. 603 XXX 14 01

This should help:



http://img.photobucket.com/albums/v4...nz/SDLNo17.jpg

thanks for the info

No prob, it's one of my extra heads. :D

what #'s have the piston ovaling difficulties again?

14's can develop cracks if overheated. Higher numbers stand up to overheating better. There's also a redesign of the oil galleries between the timing chain area and #1 cylinder but IMO it's not worth replacing the head just for that.

Sixto
93 300SD 3.0

ovaling problems are with the 3.5 liter 603. not sure what the 606 problems are but they're seemingly all external until you break a glow plug in the head.

Sixto
93 300SD 3.0

Did you get the one at the Pull-a-Part on North Tryon? It is a 14.

Carl

Nothing wrong with a No 14 head. More 14s are still running than updated 17+ on the 3.0Ls.

That's good to know about #14 cylinder heads. A false concern if the engine has not been overheated. It's always luck anyway, who knows what's happened before? :kid:

Well anything severely overheated is going to cause issues. Warping, cracking, head gasket failure, etc.

You're correct, we're second owners (many third and fourth) of these cars and you never know what has happened before.

The cylinder ovaling affects the short block (cylinder walls, pistons) but the heads are unaffected. Any #17+ head is likely to be good, unless severely overheated.

:kid:

It does not make any difference whether it is a Honda, Benz, Toyota or Ford either.