Jester Posted May 29, 2008 Report Posted May 29, 2008 Hi, I own a AE82 4AC powered Rolla that has just had a big problem, seized the distributor, shattered the cam gear and broke the timing belt all in one go. Now i've been doing the repairs and now i'm up to the timing belt and need to tune it properly, a local mech said if you just turn the crank so that cylinder one is at top dead center then set the cam so that cylinder one has the exhaust valve open that'd be spot on, one problem is i can't tell which lobe (from left to right) is the intake and which is the exhaust, can anyone help? Quote
dfunkt Posted May 29, 2008 Report Posted May 29, 2008 is the port on the end intake or exhaust??? check the manifolds and work it out. Quote
aecorolla Posted May 29, 2008 Report Posted May 29, 2008 From left to right, Intake Exhaust Exhaust Intake Intake Exhaust Exhaust Intake Make sure cylinder 4 is on overlap as cylinder one is at tdc on the compression stroke. Quote
Jester Posted May 30, 2008 Author Report Posted May 30, 2008 (edited) thanks, i thought that but it looks really weird to me so got kinda confused. but what do you mean make sure cylinder 4 is on overlap? i'm not sure what you mean. does that mean that it's exhaust valve is about to open? Edited May 30, 2008 by Jester Quote
irokin Posted May 30, 2008 Report Posted May 30, 2008 Overlap is when both valves are (partially) open. Quote
Jester Posted June 10, 2008 Author Report Posted June 10, 2008 ok excuse my stupidity but as the car still isn't going i have to be thorough, going by my picture above from left to right is cylinders 1-2-3-4 yes???? Quote
towe001 Posted June 10, 2008 Report Posted June 10, 2008 Yes, if your talking about the cam belt end of the motor. Firing order is 1 - 3 - 4 - 2 A worthwhile thing to do would to go into your local auto store and grab a service/repair manual for the car. Like a Haynes and/or a Gregory's manual Quote
madrolla68 Posted June 10, 2008 Report Posted June 10, 2008 (edited) From left to right,Intake Exhaust Exhaust Intake Intake Exhaust Exhaust Intake Make sure cylinder 4 is on overlap as cylinder one is at tdc on the compression stroke. Are you sure normally exhaust ports are at the ends and the inlets are siamesed in two pairs. Just asking MAtt Edited June 10, 2008 by madrolla68 Quote
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