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**Wotname** · 17-06-2018, 00:19

What is the best practice when it comes to refitting an injector into the head?

Especially in terms of preventing it from becoming stuck next time it is removed.

model 10 · 17-06-2018, 07:58

Aviation spark plug lube.

**a64pilot** · 17-06-2018, 11:05

Quote:

Originally Posted by Ecos

Aviation spark plug lube.

Which is either lead or graphite?
Used the lead based on Military turbine engines and the graphite on Civilian recip engines.
Never thought to use antiseize on injectors.

Olly75 · 17-06-2018, 11:24

Tef-gel. It's awesome.

**a64pilot** · 17-06-2018, 12:01

Quote:

Originally Posted by Olly75

Tef-gel. It's awesome.

Yes, but is it made for high temps?
Then of course there is the what does the engine manufacturers manual say?

Sailmonkey · 17-06-2018, 13:40

I’ve always used copper or graphite based anti seize.

**Wotname** · 17-06-2018, 15:33

Quote:

Originally Posted by a64pilot

Yes, but is it made for high temps?
Then of course there is the what does the engine manufacturers manual say?

In this instance the manual gives no guidance. I would be interested to hear what other manuals say about the issue.

Also some real life experiences of what works or doesn't.

Olly75 · 17-06-2018, 16:15

Tef gel is good to 350 degrees c if I recall correctly. my manual also gives no guidance.

model 10 · 17-06-2018, 17:29

In the case of a Perkins, nothing is needed. The copper gasket is the only seal. There are no threads to seal but, the space between the nose/body and the head can jamb up with gunk so some sort of sealant/compound is great for future removal. Not worth mentioning in the manual, perfume on a pig.

**Wotname** · 17-06-2018, 17:49

This is the kind of stuck I wish to avoid http://www.cruisersforum.com/forums/...-202441-2.html
.
Sure there are always methods of removing a stuck injector but IMO, preventative is better than cure - hence this thread.

**a64pilot** · 17-06-2018, 19:17

Maybe I should jinx myself, but as have never had a stuck injector. I assume those that are, have not been removed in decades?
I have mine out every couple of years. I didn’t on my truck as that was an entire weekend to replace injectors. Things were about eight inches long too.

**Wotname** · 17-06-2018, 20:10

Quote:

Originally Posted by Olly75

Tef gel is good to 350 degrees c if I recall correctly. my manual also gives no guidance.

I had a look at the copper Never Seize can, says it good for 980C or 1800F! Maybe I should try it; on the sides, not the seat / nozzle.

**Wotname** · 17-06-2018, 20:12

Quote:

Originally Posted by a64pilot

Maybe I should jinx myself, but as have never had a stuck injector. I assume those that are, have not been removed in decades?
I have mine out every couple of years. ..........

Maybe this is really the best practice!!!!!

billknny · 17-06-2018, 22:13

Quote:

Originally Posted by Olly75

Tef-gel. It's awesome.

It is awesome... and I use it all the time. But it is unsuited for the temperatures at a diesel injector might see.

Use Tef-gel in lots of places on your boat, but when it come time for nuts and bolts on the engine, use a proper metal copper or nickel based anti-sieze rated for high temperatures. They work, and they are made for THAT job.