1997 Chevy Monte Carlo 6 cyl Two Wheel Drive Automatic 123000 miles
My timing belt broke & I'm trying to change it. I'm at the stage where the manual says to turn cranshaft to TDC for #1 on exhaust stroke. My question is - How do I know or tell the difference between the exhaust stroke and compression stroke - since the cams are not controlling the valves at this time the air coming out of the piston is the same.
I have a 3.4 DOHC engine. It has the Ingition Control Module which has 3 coils, each sends a spark simultainously to 2 spark plugs - one is called a waste spark which goes to the spark plug on the exhaust stroke and the other to the spark plug on the compession stroke (ie: spark plugs 1 & 4, or 2 & 5 or 3 & 6).
Your reply stated looking at the ignition rotor, which this car dosent' have. I did double check the Haynes repair manual and it does state " Exhaust stroke". The Chilton Rapair manual does not specify exhaust or compression - just says TDC on # 1 cylinder.
I wondering if the timing is somehow adjusted by the cam sensor working with the cranshaft sensor, then sending this info to the Ignition Control Module and the Powertrain Control Module - which than knows the position of the valves and therefore whether its the compression or exhaust stroke.
Thursday, January 17th, 2008 AT 4:27 PM