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post #1 of 4 (permalink) Old 03-18-05, 01:02 AM Thread Starter
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Engine Tech Question

Im in the process of changing my camshaft and removing the cylinder heads.

With the fan belt removed I noticed that when I turn the crankshaft via the crankshaft pulley bolt there is slack or what seems to be excessive clearance at the pulley. I can turn the crankshaft a couple of millmetres in either direction before tension is taken up and the engine begins to move the pushrods.

Not sure if this is normal, this problem is not noticeable when the rockers were removed. ( when theres no compression )
This makes me think the keyway is OK and that it could be related to the way the gear drive is operating.

Has anyone seen this before?

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post #2 of 4 (permalink) Old 03-18-05, 01:47 AM
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Re: Engine Tech Question

Quote:
Originally Posted by CRUISIN
Im in the process of changing my camshaft and removing the cylinder heads.

With the fan belt removed I noticed that when I turn the crankshaft via the crankshaft pulley bolt there is slack or what seems to be excessive clearance at the pulley. I can turn the crankshaft a couple of millmetres in either direction before tension is taken up and the engine begins to move the pushrods.

Not sure if this is normal, this problem is not noticeable when the rockers were removed. ( when theres no compression )
This makes me think the keyway is OK and that it could be related to the way the gear drive is operating.

Has anyone seen this before?
It is just timing chain slack. It is less noticable when the rockers are disengaged as there is less strain on the chain, due to no compression resistance pushing at the pistons.

10.70 @ 125.00 on the black fun top
408 Cube Cleveland.
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post #3 of 4 (permalink) Old 03-18-05, 02:23 AM Thread Starter
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Re: Engine Tech Question

Quote:
Originally Posted by xdclevo
It is just timing chain slack. It is less noticable when the rockers are disengaged as there is less strain on the chain, due to no compression resistance pushing at the pistons.
Ok, im running a milodon gear drive, should I be concerned?

Does this effect the cam timing?
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post #4 of 4 (permalink) Old 03-18-05, 02:42 AM
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Re: Engine Tech Question

Quote:
Originally Posted by CRUISIN
Ok, im running a milodon gear drive, should I be concerned?

Does this effect the cam timing?
Hi
The Milodon Gear drive is a great unit, its designed to run about 2" back lash. This is adjustable.

Brett
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