Kholer k181 head studs

[1968Commando 55]

Hello all, in the process of rebuilding my motor I went to tighten down a head stud and the bolt on it just started to spin with very little torque applied so now I need to find a new head stud and I have come up with very little suppliers and the ones I have found they are very expensive what would you all suggest I do, if needed I can get pictures.

[siebenaler 114]

Are you saying the 3/8 inch nut that goes on the stud that sticks out of the head stripped out?

[ebinmaine 70,398]

One of the excellent things about wheel horse as a company is that they used a lot of what's called, standard parts. Nuts bolts bearings sleeves clips fasteners of any kind.

 

Look at McMaster-Carr after measuring what you have.

[1968Commando 55]

3 hours ago, Mark siebenaler said:

Are you saying the 3/8 inch nut that goes on the stud that sticks out of the head stripped out?

Yes and it messed up go the stud 

[squonk 42,364]

K181 studs are 5/16"  Measure how long you need. Buy a carriage bolt the right length. Cut the head of the bolt off. You now have a new stud.

.

[Achto 28,627]

If you do not need to use the top of the stud for any other mounting purpose, then just replace the stud with a grade 8 bolt. Most cylinder heads use a bolt instead of a stud and nut.

 

Note - No split lock washer should be used on head bolts. 

Edited February 7 by Achto

[1968Commando 55]

1 hour ago, squonk said:

K181 studs are 5/16"  Measure how long you need. Buy a carriage bolt the right length. Cut the head of the bolt off. You now have a new stud.

.

…..I can’t believe I overlooked this 🤦‍♂️I shoulda thought about this 

Edited February 7 by 1968Commando

[pfrederi 18,289]

Most carriage bolts are only GR2  you can get GR5 but my have to look.

[953 nut 57,586]

2 hours ago, squonk said:

Buy a carriage bolt the right length. Cut the head of the bolt off.

I agree with Paul @pfrederi, carriage bolts are too soft. You can buy studs of any length you desire from McMaster-Carr.

 https://www.mcmaster.com/products/studs/thread-size~5-16-18/material~steel-2/threading~fully-threaded/

[WHX?? 50,563]

4 hours ago, Achto said:

If you do not need to use the top of the stud for any other mounting purpose, then just replace the stud with a grade 8 bolt.

The only thing that comes  to mind is a stud for a starter gen  bracket. 

Edited February 7 by WHX??

[squonk 42,364]

Never had an issue with carriage bolts used as studs on a Kohler head.

 

As Taryl says;

 

"It's not the space shuttle, it's a lawn mower! " 

[oliver2-44 10,274]

Use a piece of 5/15 all thread rod if you can find it in grade 5 or higher.  The torque on the K181 is low enough that grade 5 is more than adequate.

@squonk is actually close to right (scare), with the torque on a K181 being 20 ft/lb even a grade 3 is in the upper ball park.