23-04-2013, 05:13 PM
(23-04-2013, 04:13 PM)ginge191 Wrote: I understand how the 4 stroke works. But, if this was the case, surely the timing points would stay the same as it was lined up with the flywheels (cranks) position?
What worries/confuses myself and mark is why the timing is no longer lining up to its corresponding locking points? There's not one locking point on the fly surely?
I continues to myth me with the engine struggling to keep itself on a decent idle, let alone revving.
Tomorrow, I'll get back and draw where the locking points are.
To add some clarification, Darren I didn't check the timing 3 times today; in total, I've had to retime it 3 times over a few weeks. Only twice today. Once obviously when the 'new' pump was out on, and again after we had ran it for about 10 minutes or so.
Sorry mate but it would appear that you DON'T understand it..
Just because it locks up on the fly, doesn't mean that the cam and the pump will lock up, the fly locks the crank up at TDC pistons 1&4, and as it's a 4 stroke engine, that means that the cam and pump are either "180 out" as you put it, or they should be in time. If they aren't, then you've cocked up somewhere. Go back to step 1, and retime it fully.
Also, If you're getting a lot of "belt slap", then you need to check you're getting the tension right. You should be able to twist the belt 90* at the mid point of it's longest run, conveniently this is right on the top on these engines, between the cam pulley and the pump.
Hope that helps.
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