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Tue Apr 06, 2010 6:58 am

I have searched through several posts and could not find an answer.
I removed all of the case oil gallery plugs, tapped for plugs and cleaned. What i need to know is what is recommended for sealant on these plugs when installing. In the posts i have read they say Loctite, but which number? Is there any other recommended sealer besides locktite?

Thanks,
Randy

Tue Apr 06, 2010 7:26 am

I have always used permatex thread sealant and never had a problem

Tue Apr 06, 2010 7:36 am

Loctite 545 thread sealant is what I used on my full flow oil line fittings.

Tue Apr 06, 2010 7:42 am

Great..thanks.

Randy

Tue Apr 06, 2010 8:13 am

I did extensive research on this in the shoptalkforums, type 4um specifically awhile ago. Loctite 518 was what was agreed to be the best thing as it's non aerobic, meaning it will cure without air.

Tue Apr 06, 2010 10:24 am

These are tapered thread plugs. I use no sealant with tapered threads.

Max

Tue Apr 06, 2010 11:45 am

Try telling a pipe fitter not to use any sealer/thread dope on the gas line being fitted up. Couple things to consider even though it is a tapered fitting, it reduces the chance of gauling and gaurantees a leak proof connection.

I use the NAPA teflon pipe sealant which is the same as the Permatex 545, just comes in a NAPA container, also used 518, results the same, easier to get the teflon pipe sealer.

Tue Apr 06, 2010 4:23 pm

If you do want it to come out--Teflon, they make a liquid kind even.
If you don't--red or green locktite.

Tue Apr 06, 2010 5:42 pm

If you talk to the race engine builders, most will say they use blue loctite. So that is what I use. Simple.... :0)

Tue Apr 06, 2010 5:50 pm

gonna get flamed i know..... :P ....had a plug i couldnt get to stop leaking, used pipe dope from lowes( recomended by steve at srp racing) ==no more leak.

Tue Apr 06, 2010 6:07 pm

Wow! 8 different sealants (so far) and they all work. Cool!

Tue Apr 06, 2010 6:15 pm

still waiting on chewing gum :wink:

Tue Apr 06, 2010 6:45 pm

Hey Modok do you think ketchup would work? :D

Tue Apr 06, 2010 7:47 pm

Chewing gum yes, ketchup only with mayo, I have also used RTV, Curil, Form-a-gasket and when the threads felt a little loosey-goosey due to an over zealost PO while threading JB Weld. Now has anybody tried mustard yet?

Tue Apr 06, 2010 9:30 pm

No, no, ketchup is more like for flanges.
Actually regular locktite is very effective for plugs. Like magic.
At work we do diesel heads with injector tubes, like International 466, and the Int/Ford pickups. These have locktite on the press-in tubes right from the factory. I also see Cummins uses locktite on a lot of the casting plugs and oil galley plugs.. Also good for insurance on tapered repair plugs/pins.
Green goop is good stuff. The "red" is the same as the green just thinner viscosity.

One main advantage of the teflon pipe sealant is it reduces friction a lot, it's a permanent lube as well as a sealer. Lets you tighten pipe tread without the whole mess galling up. Smoooth.

Regular brown aviation goop or condiments do not have these advantages.

Pam is good for making non-stick gaskets!

Tue Apr 06, 2010 10:03 pm

Quote: Pam is good for making non-stick gaskets!
She's also good for other...things! :)

Tue Apr 06, 2010 10:08 pm

Blue loctite is the preferred sealant, however if you have a troubled plug as 69 coppersunset did, a small dab of pipe thread sealant works wonders.

Tue Apr 06, 2010 10:33 pm

Green goop can fill a .030" gap.......................
They even make a thicker kind, I forget the color, it's like mortar!
Blue is just thinned out locktite. Like lite beer, less active ingredients.

I've used so much of the stuff I even know what it tastes like....friggin weird. I pop the plugs out of a Cummins and I can smell it!

Tue Apr 06, 2010 10:40 pm

modok wrote: Green goop can fill a .030" gap.......................
Blue is just thinned out locktite. Like lite beer.

Not sure how you tap your threads, but most of us don't need to fill a .030" gap when installing a galley plug.
One more thing, I find it diffcult to use anything called "goop" on a engine I build, I prefer the words sealant, or sealer........ I'm just sayin.......

Tue Apr 06, 2010 10:49 pm

modok wrote: Green goop can fill a .030" gap.......................
They even make a thicker kind, I forget the color, it's like mortar!
Blue is just thinned out locktite. Like lite beer, less active ingredients.

I've used so much of the stuff I even know what it tastes like....friggin weird. I pop the plugs out of a Cummins and I can smell it!

I believe the green is a retaining compound, and will fill gaps as well.....like you said. However, it is not a thread sealant.

I would use a liwuid teflon, or an anaerobic sealant (blue loctite) with the primer.....yes, you're supposed to use a primer with all of the anaerobic sealants. Basically, it's acetone.