Stubborn head bolt?

[nikster]

Ordered a head gasket & gonna change it. On my #122-12hp.

Does it need a new head gasket= NO! But since i'm re-building the carb I figured I might as well clean-up the head.

In anticipation of this task I feel I am going to run into a stubborn bolt? Don't know?

My question?
If one run's into a stubborn bolt is it advisable to give it a shot with a mapp gas torch to heat it up a bit? Has anyone done something like this to a head bolt?
Don't want to cause myself any grief.

I've been soaking my head bolts with pb blaster daily.

Nik,

[Methos]

Nik the one's I've done I've never had a problems with them. I've only done a couple so not to many but they all came off real easy.

[cubs-n-bxrs]

Nik I have prolly done 20 or more kohler rebuilds and have only had ! head bolt snap off. If you have had this head off before it should come off without a problem. When reinstalling it is a good idea to use high temp anti seeze on the bolt threads and on the washers and under the bolt heads. An ounce of prevention is worth a pound of cure. And you will never have too worry about that scenario ever. One other thing clean out the head bolt holes with a 3/8 16 tap just to remove any crud in the holes. Then give the holes a shot of compressed air.

[Vince_o]

I broke one on a 140 at the shop once. If you break it off and there is enough of the stud left, weld a nut on it and get it out. The heat from the welding will break it loose, most times.

If not, get the center punch out, good drill bits, and an easy out. Ill drill them right up to the threads, then run a tap in and it starts to break out the old threads.

I have gooten so aggervated that I got heavly drunk and beat the snot out of the block and sent it to the scrap yard. I dont recomend that, bad hang over in the morning!

[nikster]

Thanks Guyzzz,

Anti- seize it will be!

But the way things go for me ?

Only hope it goes smoooooooth.

Nik,

[westofb]

I pulled 2 engines apart in the last 2 days, they came out just fine. I did use my 1/2" impact on them though (I was in a hurry to get them apart).

[darkminion_17]

maybe, run the motor get it hot,real hot and that stud will submit to your powerful ratcheting action.
Vinny you drunk now?

[Mlamar]

Sometimes I put another nut on top of the one all ready on the stuck bolt and give it a few taps with a hammer It may or may not help. Just remember that it you feel the bolt flex when wrenching on it there is a good chance it's about to break. I have found that one of the most important steps in repairing anything is to know when to walk away from it for a while. A short break can help to relieve some of the stress and gives me a little time to think about other possible solutions Most know this but this is a good place to add that when replacing the head gasket always make sure the head has a flat surface.

[hydrocub]

Good advice Mlamar . Learn WHEN to walk away . It will prevent alot of
this :

[1966cub102]

headbolt or any other bolt,If you can get it hot running the motor great, in My experience with stubborn bolts I have found if it doesn't come out easy a good shock with a hammer will help to break it free just dont screw up the head,and rather than an easy out I would drill a small hole through the center of the bolt this will releive some of the pressure on the threads,you can always open the hole up later to tap it.I have found nothing easy about an easyout if you break one then you really have problems in 30 plus years as a machinist I have seen many a broken easy out and taps be carefull and good luck