ATI Damper - Non-Press fit?
Thread Starter
Teching In
Joined: Apr 2007
Posts: 48
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ATI Damper - Non-Press fit? Putting an ATI Damper on a forged 4.00" Eagle crank. ATI part number 917264. For a stock diameter with AC.
No key way in the crank but I'm not running a supercharger anyway.
Factory damper does require a push (press fit) onto the Eagle crank.
The new (brand new out of box) ATI will slide right on with a little force by hand. Not even a hammer needed.
Did I order the wrong part number? I would think there would need to be some interference fit here even just running stock accessories...?
Wondering if this is normal and I should just tighten up the bolt or if I need a new damper.
ATI is closed right now and I'm impatient.
Figured one of you has installed the same part number...
No key way in the crank but I'm not running a supercharger anyway.
Factory damper does require a push (press fit) onto the Eagle crank.
The new (brand new out of box) ATI will slide right on with a little force by hand. Not even a hammer needed.
Did I order the wrong part number? I would think there would need to be some interference fit here even just running stock accessories...?
Wondering if this is normal and I should just tighten up the bolt or if I need a new damper.
ATI is closed right now and I'm impatient.
Figured one of you has installed the same part number...
Thread Starter
Teching In
Joined: Apr 2007
Posts: 48
Likes: 0
The sheet that comes with the damper has a specific interference range. You are supposed to measure the ID of the damper and the OD of the crank. Interference range is very small, something on the order of several 10,000's of an inch. If it is loose it can't be used. I would first measure the OD of the crank snout, and when compared to the instructions, I think you will find it out of range.
Also, just because the stock unit will not slide on by hand does not mean that the fit is correct. You need to measure the crank. ATI may be able to provide a different hub and hone it to your requirements, especially if the crank OD is out of range. You need to get this right to prevent issues down the road, the first of which might be a broken timing chain.
Also, just because the stock unit will not slide on by hand does not mean that the fit is correct. You need to measure the crank. ATI may be able to provide a different hub and hone it to your requirements, especially if the crank OD is out of range. You need to get this right to prevent issues down the road, the first of which might be a broken timing chain.
