Replaced head gasket, do pistons have to be at tdc for car to start?
06LS2GTO
MEMBER
2006 PONTIAC GTO
76,000 MILES
Some of the pistons are halfway down and some are all the way up
Wednesday, December 21st, 2011 AT 5:39 AM
1 Reply
CARADIODOC
MECHANIC
33,916 POSTS
How do you want them to be, all up at the same time? Only the number one piston must be at top dead center, and the camshaft(s) sprockets must be lined up with the timing marks when the timing chain is installed.