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Sun Jan 09, 2011 2:10 pm

Well, I pulled the plugs on my '65 40Hp and #3 apparently had a thread repair insert that came out with the plug. I put a little spray lube on it, and it seems to thread back in just fine. This was put in by RIMCO in 2005 timeframe.

I eventually plan to change the heads - I located an NOS set of square boss '65 heads recently. What I am wondering is if I should try to get the saver off of the plug and install it by itself with some sort of locking compound, or just let it stay on the plug for now?

Engine was cold from sitting overnight, not hot.

Plugs looked good to me. ~240 miles on engine so far. Still breaking in and need to fine tune carb.

Sun Jan 09, 2011 2:42 pm

Get it welded up and retapped...which is the correct way. Have your valve seats replaced while you are at it. Ray

Sun Jan 09, 2011 4:02 pm

I'd clean it up, coat it in green goop and torque it back in.

Then the next time you take out the plug, the insert should stay put.
If it works great, if not no big deal.

Sun Jan 09, 2011 6:23 pm

By green stuff you mean Loctite Green?

I probably will Ray for another build, I don't have time to take it apart now before our move and I need ti running to move it.

I'll put the new heads on it and then repair these the right way later.

Thanks!

Sun Jan 09, 2011 6:55 pm

modok wrote: I'd clean it up, coat it in green goop and torque it back in.

Then the next time you take out the plug, the insert should stay put.
If it works great, if not no big deal.

X2
Green loctite aka sleeve retainer.
Torque it down and let it set over knight.

Sun Jan 09, 2011 7:33 pm

When it comes time to change plugs, if the insert doesn't come off the spark plug, just buy a new solid threaded insert, cheap. NAPA, CarQuest.

I've been running a solid threaded insert on my 1835 engine #2 cylinder for several years now (machine shop had installed four heli-coils when re-doing the heads ages ago, one threaded out).

Sun Jan 09, 2011 8:02 pm

Rimco just welded, tapped and new valve seat mine. $210.00
Typically when the threads let go, it's due to a cracked head.
Thought I could get away with a Timesert, until I found the crack.

Sun Jan 09, 2011 9:29 pm

Loctite products break down at 300F approximately.....use hi temp silicone to too run it in.

Sun Jan 09, 2011 10:41 pm

This is a solid threaded sleeve, though maybe hard to tell in the pic.

Are you serious about the silicone crusher? Wasn't sure if you were or being funny ;)

I remember now, this plug hole came back looking like crap after Rimco did the heads. I sent it back for repair and this is what they did :(

Sun Jan 09, 2011 10:53 pm

Yes Loctite is a thermoplastic and will break down.
The only thing I found that will hold a insert in is JB Weld.
Have not seen a that big of insert in years. Was common size until KD came out with the smaller insert.
Preferred method is Time-Sert. But the hole in your head is to big.

Sun Jan 09, 2011 11:11 pm

gerg wrote: Are you serious about the silicone crusher? Wasn't sure if you were or being funny ;) Yes.....I am serious.

Sun Jan 09, 2011 11:18 pm

expando....good shit....

Sun Jan 09, 2011 11:52 pm

bugninva wrote: expando....good shit.... What is it?

Mon Jan 10, 2011 12:17 am

sorry, I muffed up the spelling... I used to use x-pando back when I was a steamfitter/pressure vessel welder.... tried it on some inserts that kept backing out... they never came out again..
(not my image, didnt' want to head to the basement)

Mon Jan 10, 2011 1:02 am

Where would I look for that? Home Depot or other hardware type store?

Mon Jan 10, 2011 7:49 am

plumbing supply house... usually geared toward the professional plumbers and pipe fitters... you can pick it up on ebay, along with anything else you can imagine.... :wink:

here is mine:

now, I'm not saying this stuff is the bee's knees, just that it worked and worked well... I tried JB weld and it let the insert(KD brand available at FLAPS) back out with the plug the next time I pulled the plug... I figure it's likely that the threads were not cleaned well... okay I know they were not because i didn't clean them when I pulled the head to tap it, and it was a bit tougher to get to after I reinstalled the head... :lol:

Mon Jan 10, 2011 12:33 pm

X-Pando -- I used that stuff -!!!!!! I got it from a Porno site.

Kidding!!!!!

What I did was use some stuff like JB weld, it was called PC -7 , but I also took a small chisel and cut across a few of the threads on the insert just near the upper part of the insert. That made the insert go in easy but when it reached the end of the thread it jam locked in place. That with the Epoxy and my problem was solved.

There are some inserts that have some wedges. When you install the insert you then hit the wedges and they expand into the thread on the head and lock it in place. I think K&D made them.

Mon Jan 10, 2011 12:46 pm

Cow
D not find Xpando anywhere locally, went to the one pro plumbers supply I know of. What temp range should I look for presuming i can't find any of the named products here? 400*F good?

This insert has some serrated edges at the top I guess were intended to bite into the head.

Mon Jan 10, 2011 2:29 pm

This the place I got mine years ago, www.mcmastercarr.com

http://www.mcmaster.com/#self-locking-inserts/=aj80j9

There are more then those shown and in many more sizes.

Mon Jan 10, 2011 2:32 pm

Save you searching

http://www.mcmaster.com/#catalog/116/3260/=aj82am