[rpol78]

When I put the ATI damper on my engine I didn't install one, hopefully it won't impact the belt alignment. I had them add a second keyway in my Callies crank so I'm not sure I could have installed one anyway without modifying it. Also ATI mentions a groove in the hub for it which I didn't see in the ATI hub I have My hub was just tapered at the end, but if I'm seeing your hub in the background of the first pic it looks like it's made for one.

How thick is the washer?

From ATI

"Depending on the year of your engine / vehicle you may notice a thin “friction” washer behind the damper hub in front of the first oil pump gear. This washer should be left in place and will not hurt anything if you are or are not pinning or keying your crankshaft. If your year does not have this washer and you would like to add one, there must be a machined “lip” provision on the back of the hub to do so."

 

[rpol78]

The flat metal washer part is about .005. As the instructions call it a "friction" washer below.

Yep, there it is, #2 on "installing the hub on the crank"... I should have "read" the instructions I guess... sheesh! 🤦‍♂️

Thanks, I appreciate the replies!

Thanks for the response. I just looked at the single keyway hub that came with the ATI balancer and it does have the groove like yours. I had to buy the hub that had 2 keyways to match up to the crankshaft. I could swear that it was just tapered on the end but in the ATI pics it shows the groove in it also but I really don't want to pull the balancer just to check it. Since the replacement washer doesn't seem to have the rubber, it doesn't look like you'd need the groove to run it. Either way I would have had to cut the washer for the second keyway. I don't think .005 will impact the alignment enough to matter but time will tell.

Has anyone ran an ATI balancer without the washer and if so did you have any problems?

 

[rpol78]

Thanks Mike. I'm going to run the Kong 2650 so had the second keyway added.

Someone posted that the rubber was to seal the balancer so that oil wouldn't leak between it and the crankshaft. I wonder if there's any truth to that. I figured since it was so thin (i.e. .005) that it was to hold it in place on the balancer to prevent damage while installing it.

 

[rpol78]

I guess now you get to run through the jungle bare bottomed like me