J200 - Damaged Crankshaft/Flywheel Nut Threads

[tentantoes]

I need to buy a large die to chase/repair threads on the crankshaft but can’t find the size and thread pitch anywhere online, would someone here happen to know it? This is on a 1996 J200TXEDR. I can buy a new nut, part# 0326042, but I don’t have a way to measure it outside of taking it to a machine shop and asking for help, which it may come to. Thanks for your time.

 

[racerone]

Post pictures of the damaged thread.

 

[tentantoes]

I think may be slightly mushroomed but I’m not sure.

 

[tphoyt]

I’d clean them up with a triangle file and call it good but that’s just me
Best

 

[flashback]

I’d clean them up with a triangle file and call it good but that’s just me
Best

My thoughts as well, it's just the lead thread an a careful dressing should work.

 

[airshot]

Looks like someone pounded on the end...any machine shop should have a thread pitch gage to measure it for you. Actually they are not expensive, you might buy your own to have one on hand.

 

[tentantoes]

Thanks for your input all. My concern is I can’t get the nut on. I’ll go ahead and order a new one in case that‘s the issue, and a thread gauge actually sounds like a tool I would use fairly regularly. Thanks so much.

 

[racerone]

Here is my approach.-----Buy a nut.----Split the nut.---Hold the 2 halves on the crank with a hose clamp.----Use some diamond compound and lap the threads/-----Clean threads and try a new nut.----Repeat as needed.

 

[airshot]

Sounds like to much work, once you get the correct thread size buy a threading die, not very expensive and just chase the existing threads.
A thread pitch gage and a threading die together will give you change from a 20 dollar bill.