Accessory Belt Misalignment
Thread Starter
Instructor
Joined: Mar 2017
Posts: 131
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From: Beaverton OR
Accessory Belt Misalignment
I installed a double roller cam on my '69 L36 427 so now the crank dampener is pushed out a little more towards the radiator resulting in a misalignment with the water pump and accessory pulleys. I could shim things up with a few washers (doesn't need to be much) but wondering what other people do in this situation. Thank you for your ideas.
Safety Car
Joined: Apr 2006
Posts: 4,057
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From: BC
The timing chain used has no effect on the crank damper. It probably isn't installed all the way on. When installing the damper on my L36 I use an ice pack wrapped around the crank snout for awhile and submerge the damper in sink full of hot water. I makes installation very easy. Make sure you use a removal/install tool for the job and not just a bolt but you are going to have to do it again.
Last edited by CanadaGrant; Dec 13, 2017 at 07:34 PM.
Race Director
Joined: Jul 2015
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From: SW Florida.
it more likely is just the balancer isn't on all the way. you would have seen the misalignment on the timing chain big-time, or you never would have noticed the belts misaligned. get the installer and crank the balancer down harder and see if it moves more. worst case, pull the balancer and get a set of digital calipers and measure the distance from front of sprocket to seal lip and compare to the same distance on balancer. back of balancer to seal mark. if balancer measurement is longer, you might have to get a piece of pipe, maybe conduit or exhaust pipe and bang the sprocket in til it seats. if measurement is the same, the balancer didn't go on all the way. I don't think heat will help because of the time involved cranking the balancer on. maybe spend a few minutes with sandpaper cleaning up the inside of the balancer and the crank snout.
Thread Starter
Instructor
Joined: Mar 2017
Posts: 131
Likes: 3
From: Beaverton OR
Thanks guys for you suggestions. My original thought was that the double roller sprocket was thicker overall but sounds like it's more likely due to the balancer not being on all the way. I'll check it out.
Racer
Joined: Nov 2017
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I sure hope you're using a damper installation tool. It threads into the snout of the crankshaft then you turn a big nut which exerts pressure against a thrust bearing which exerts pressure against the hub of the damper.
Thread Starter
Instructor
Joined: Mar 2017
Posts: 131
Likes: 3
From: Beaverton OR
I finally had the time to address the alignment issue. Sure enough, the damper wasn't on all of the way. AutoZone to the rescue! They had an installation tool for loan. Removed the dampler, applied a little heat, and voila! Thanks for the helpful comments guys.
