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Old 01-10-2008, 07:29 AM
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Gear Drive to Timing Cover Clearance

So last night I was installing a summit timing gear drive set and I ran into a problem with clearance to the timing cover.

The timing cover is a polished aluminum piece that is designed to work with this gear set.

First I installed the timing gear and set the cam all the way back in the motor, then I installed the crank gear, made sure they were lined up and installed the idler gears as per instructions,

For those who don't know...the idler gears have a thrust button between the big idler and the block and you are supposed to adjust the clearance by machining the timing cover. It seems backwards but if you change the thrust button the gears won't line up with cam gear. Anyways...

Without the timing cover everything is perfect all lined up beautifully, but when I put the cover on I have -.185 clearance between the cover and the idler gear shafts. Normally I wouldn't think twice and machine clearances in the timing cover. However the cover is only .110 thick.

Can anyone recommend a reasonably priced timing cover that worked for your timing gear drive setup. I prefer polished aluminum but I am open for anything.
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Old 01-10-2008, 07:35 AM
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What are the chances of using a spacer to shim it out a bit ? you only need like .075 to clear , right ? Maybe a thick gasket ??
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Old 01-10-2008, 07:36 AM
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I thought about that, but then the oilpan wouldn't line up with the flange on the bottom.
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Old 01-10-2008, 07:48 AM
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No doubt .....
hmmmmmm....

I'll keep the gears workin' and shoot back if I come up wit summpin' ........
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Old 01-10-2008, 07:53 AM
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Thanks, See if you can come up with a cover that will work, I don't mind returning this one.
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Old 01-10-2008, 08:02 AM
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Quote:
Originally Posted by Double_v23
So last night I was installing a summit timing gear drive set and I ran into a problem with clearance to the timing cover.

The timing cover is a polished aluminum piece that is designed to work with this gear set.

First I installed the timing gear and set the cam all the way back in the motor, then I installed the crank gear, made sure they were lined up and installed the idler gears as per instructions,

For those who don't know...the idler gears have a thrust button between the big idler and the block and you are supposed to adjust the clearance by machining the timing cover. It seems backwards but if you change the thrust button the gears won't line up with cam gear. Anyways...

Without the timing cover everything is perfect all lined up beautifully, but when I put the cover on I have -.185 clearance between the cover and the idler gear shafts. Normally I wouldn't think twice and machine clearances in the timing cover. However the cover is only .110 thick.

Can anyone recommend a reasonably priced timing cover that worked for your timing gear drive setup. I prefer polished aluminum but I am open for anything.
is it the cam thrust button keeping the cover from seating or is the axle from the big gear on the idler holding the cover out. if the cam trust button is holding it out remove it so you can determine axle clearance. pull the idler out a little then install cover, remove cover and check clearance on axle for big gear to block, i run about .008 clearance, machine the axle to get proper clearance. now install cam thrust button and cover and adjust the button for proper clearance. some covers are a pain, i have had good luck with the cloyes 2 piece aluminum cover. sam-missle
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Old 01-10-2008, 08:09 AM
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I never got to check the cam button because the axle was sticking out so far. If I machine the axle so that the cover will seat properly then the idler gears would only be about half way on the cam and crank gears. Like I said they line up perfectly, the cam gear is all the way back it lines up with the crank gear, and the axle stud is the perfect distance from the block, if I machine it the gears are out of alignment.
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Old 01-10-2008, 08:12 AM
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Is this the cover you use?

http://www.competitionproducts.com/p...p?number=9-221
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