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Discussion Starter · #1 ·
so the thing finally shows up, and I'm staring at a solid collar with no holes and two set screws. I don't get it - am I supposed to drill holes for the set screws to hold the collar in place? Anyone who has installed one...can ya fill me in on the "light machining" required?
 

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You need to grind the nose of the crank down and remove the original drive.
Once you have the correct interference calculated and the nose ground to suit, you need to cool the nose of the crank and press on the drive collar.
Its not critical but we always phase the drive flats to tdc.
Once its on and back to room temperature you can drill and tap for the grub screws.
Not really the sort of thing you can do at home, it needs specialised machining and tools.
 

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Discussion Starter · #3 ·
are the grub screws going into/tapping into the crankshaft itself, or do they just put pressure on the crankshaft?

definitely not DIY, just need instructions to give my mechanic when I go to his shop where my engine is.
 

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I turned my crank down to 0.001" bigger than the bore dia of the collar, heated up the collar and slid it on. Then I drilled and tapped the 2 holes and screwed in the grub screws.
 

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i remember someone having one of these fitted the machineshop pinned it on the crank. the pins went through into the thread which ment he struggled to get the pully bolt back out after installing the rods & pistons
 
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