Post war 270's differances.

pfarber · Post by **pfarber** » Wed Jun 21, 2006 12:24 pm

It seems that we as a group really don't have much info for the care and repair of a WWII GMC 270's engine.

Not concerned with external differences.. just the most common repair parts for an overhaul, repair.

So far the differences I have been able to find are:

WWII 270
Used domes cylinders and pistons
Used 'small' intake ports

Directly after the war the 270 used domes pistons but the heads were 'large port'

Late 50's the 270 went to flat pistons with 'large ports'.

Seems like the half ton and up GMC trucks/vans were the recipients for the 270s.

dr deuce · Post by **dr deuce** » Fri Jun 23, 2006 5:36 am

The head tightening swequence is quite different too.

Rockers went to sheetmetak from castings

Front mouning foot removed on later 270 and 302 engines

Chappers · Post by **Chappers** » Fri Jun 23, 2006 7:09 am

Nice bit of usefull information there , Need to see more of this sort of stuff.
Thanks Guy's