Stripped cranksnout threads can i retap

[Angel210oo]

took off crank pulley for replacement and when trying to install the new one the installer wouldn't thread in and upon inspection the threads were f’d was wondering the bolt size and pitch and if I can retap??

 

[RAU03MACH]

depends on how bad it stripped it , if not to bad maybe a tap , if treads are missing a lot
me personally i dont like Heli coils
we sent one crank in that was bad to a machine shop it had to be welded in and drilled to tap
pretty expensive for a cobrajet 429 crank

 

[Angel210oo]

The beginning threads are only messed up maybe around 5 of em

 

[RAU03MACH]

If you have the original bolt
Take it to granger or a bolt place match it and get the tap that goes with it size wise
You can clean up the threads with it

 

[r3dn3ck]

You just need to use a tap to chase the threads. Not a big deal.

 

[Angel210oo]

Anyone know the thread size for the crankpulley ? (Stock crankshaft)

 

[96blak54]

I can find out sometime this weekend when i get into my shop. Im on vacation right now

 

[RAU03MACH]

M12-1.50
whanna say

 

[Marc97gt]

Try to measure how many good threads you have left in the crank. Ideally, with steel, you want at least one diameter's worth of threads to develop the full strength of the new bolt.

 

[Dubsport]

M12-1.50
whanna say

Correct... https://arp-bolts.com/kits/arpkit-detail.php?RecordID=641

 

[Angel210oo]

Thank you all ive bought a tap and die set and have retapped the cranks snout so when the pulley is off completely the bolt goes in no issue but now my new issue is the installer will not thread in so ive opted for a 12-1.5-60mm in hopes of it installing the new pulley

 

[Angel210oo]

Thank you all ive bought a tap and die set and have retapped the cranks snout so when the pulley is off completely the bolt goes in no issue but now my new issue is the installer will not thread in so ive opted for a 12-1.5-60mm in hopes of it installing the new pulley

A bolt and washer i mean btw