Another Yanmar Fault Found

[delmarrey]

The problem with locktite is:

One needs to loosen this bolt occasionally if replacing the alternator belt, or maybe even an adjustment. I just needed to remove the alt. to get the power wire off for a modification.

[Blue Stocking]

Del, can you replace the bolt with a piece of all-thread rod, lock-tited into the block. Nut and washer to hold the bracket in place.
This is what I did in a similar circumstance when fitting a 2nd alt. to my W/beke W46

[sartorst]

Try using the blue medium strength thread lock ! I have rounded shoulders of bolts and almost pulled threads using the RED hate the stuff!!!!and one of the small tubes will go a log way

[Jim Cate]

Originally Posted by sartorst

Try using the blue medium strength thread lock ! I have rounded shoulders of bolts and almost pulled threads using the RED hate the stuff!!!!and one of the small tubes will go a log way

Agreed. If the bolt must be adjusted/removed regularly, then blue loctite is appropriate.

But it seems that the leakage isn't around the threads as I had thought, but from a gasketed joint that the bolt helps hold tight, so that the loctite won't do the job anyway.

Drat, and I guess I'm glad to have a Kubota based engine!

Jim

[delmarrey]

Originally Posted by Jim Cate

Agreed. If the bolt must be adjusted/removed regularly, then blue loctite is appropriate.

But it seems that the leakage isn't around the threads as I had thought, but from a gasketed joint that the bolt helps hold tight, so that the loctite won't do the job anyway.

Drat, and I guess I'm glad to have a Kubota based engine!

Jim

Actually the leak I have is where the bolt passes thru the outside of the casting, after passing thru the water jacket. I have no problem with the threads or gasket. It's just that the head of the bolt pushing against the adjust arm is what keeps the water from leaking.

This is why I recommend a stud and nut. The stud can be sealed (with sealant) to the casting, where it passes thru the casting, once it's tight (even with or w/o locktite on the threads) and the nut can either be loose or tight w/o any water leaking out...... Just that simple. No fuss, no muss just need a stud that will not rust.