Mk1A Interceptor Cam Timing
Posted: Sat Feb 22, 2014 8:42 am
I am doing a rebuild of a Mk1A Interceptor engine and think I may have the cam timing wrong??
I have set the crankshaft pointer so it is pointing downwards and have the marks on the cam sprockets facing each other as best as they can, they are both slightly pointing upwards when they face the centre of the engine.
The problem is that when I turn the engine over there is a point at which both valves are open, one valve hasn't finished closing before the other opens and therefore they are both open at the same time, this results in you being able to look down the inlet and see through the engine and out of the exhaust port. This doesn't look right to me as I thought one valve had to be closed before another would open??
Anyone got any suggestions on what is wrong here or is this correct?
Thanks
I have set the crankshaft pointer so it is pointing downwards and have the marks on the cam sprockets facing each other as best as they can, they are both slightly pointing upwards when they face the centre of the engine.
The problem is that when I turn the engine over there is a point at which both valves are open, one valve hasn't finished closing before the other opens and therefore they are both open at the same time, this results in you being able to look down the inlet and see through the engine and out of the exhaust port. This doesn't look right to me as I thought one valve had to be closed before another would open??
Anyone got any suggestions on what is wrong here or is this correct?
Thanks