1963 Panhead Camshaft
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1963 Panhead Camshaft
Hi -
still having probs with my Pan.
It appears that the inlet valve is still open half way up the compression stroke.
My thoughts were that the pinion gear key had sheared but checked today and all ok.
Is it possible for the cam shaft gear to slip on the shaft meaning that when you line up the timing marks the cam lobes are in the wrong position ?
Has anyone got a photo of a cam shaft showing the position of the lobes in relation to the timing marks.
Any help gratefully received.
Bit of an update-- have today pressed off the gear. The camshaft has a slot where a key would fit but no slot in the gear. So is simply a press fit , no idea how it lines up on the cam.
Could anyone give me a simple idiots guide to the cycle of the engine ie the position of valves and pistons etc at any given time. This is really doing my head in now - i'm convinced that the timing is wrong but ???
still having probs with my Pan.
It appears that the inlet valve is still open half way up the compression stroke.
My thoughts were that the pinion gear key had sheared but checked today and all ok.
Is it possible for the cam shaft gear to slip on the shaft meaning that when you line up the timing marks the cam lobes are in the wrong position ?
Has anyone got a photo of a cam shaft showing the position of the lobes in relation to the timing marks.
Any help gratefully received.
Bit of an update-- have today pressed off the gear. The camshaft has a slot where a key would fit but no slot in the gear. So is simply a press fit , no idea how it lines up on the cam.
Could anyone give me a simple idiots guide to the cycle of the engine ie the position of valves and pistons etc at any given time. This is really doing my head in now - i'm convinced that the timing is wrong but ???
Last edited by albionphill; Oct 26, 2009 at 06:40 AM. Reason: Update
Road Warrior
Joined: Dec 2007
Posts: 1,854
Likes: 20
From: Eagle River WI
OK is the valve stuck in the guide ? I'm assuming ( scary ) that all the timing marks are aligned Pictures are in service manuals I use Clymers /HD Did this bike run previous ? You say no key in slot If it sheared could be smooth ( in there but you can't see it ) If the valve is free flowing in the guide I'd get a new cam
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Hi - many thanks for your reply.
Yep all the timing marks line up. The gear is just a press fit onto the shaft so it would appear that the shaft has moved . Well - that is my line of thinking anyway.
Your probably right and i will end up buying a new camshaft. But an expensive assumption if it turns out that the problem is elsewhere.
Yep all the timing marks line up. The gear is just a press fit onto the shaft so it would appear that the shaft has moved . Well - that is my line of thinking anyway.
Your probably right and i will end up buying a new camshaft. But an expensive assumption if it turns out that the problem is elsewhere.
Road Warrior
Joined: Dec 2007
Posts: 1,854
Likes: 20
From: Eagle River WI
All the cam gears of recent years are keyed Can't imagine using just a press fit to secure the gear on the shaft But stranger sh#t has happened of the years Give Andrews cams a call they probably know the history of early cams
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