Injector seals and Holder O-rings

[PanzerSD]

I FINALLY got new CORRECT injector seals, as well as new green o-rings for the injector holders. Is this a dry fit seal? or should I be coating the seals and rings with....what? I heard motor oil, Vaseline, brake fluid...

[Tomguy]

Dry fit. Substances such as Vaseline, oil, grease etc will break the seal down much faster and prevent it from sealing!

[Graham]

Originally Posted by PanzerSD

I FINALLY got new CORRECT injector seals, as well as new green o-rings for the injector holders. Is this a dry fit seal? or should I be coating the seals and rings with....what? I heard motor oil, Vaseline, brake fluid...

Those seals are subject to all sorts of stuff - gasoline, oil from breather system etc. So hopefully they are made from a synthetic that will stand those products.

If you can get them in dry, that would seem best. But I seem to recall them being a tight fit and needing some lubrication.

I put the seals in first and made sure they were seated properly - I pushed them down with a "tool" I happened to have that kept them aligned - seem to recall them not wanting to go in straight. Then pushed in the injectors - the plastic injector tips slide in easier.

I forget, but think I may have used a little brake fluid to get the tight ones in!

[Tomguy]

A little moisture will help slide them in easier. Dab a drop of water around the seals with your fingertip. I've even heard of using dish soap. They should ideally NOT be exposed to gasoline, oil etc. I know, they will be and that's why they don't last forever - but coating them in Valvoline will simply wear them faster! Unless you're pouring the water in your intake, it won't do any harm.

[PanzerSD]

Originally Posted by Tomguy

A little moisture will help slide them in easier. Dab a drop of water around the seals with your fingertip. I've even heard of using dish soap. They should ideally NOT be exposed to gasoline, oil etc. I know, they will be and that's why they don't last forever - but coating them in Valvoline will simply wear them faster! Unless you're pouring the water in your intake, it won't do any harm.

I agree with the dishsoap at least, possibly the brake fluid, as it makes the rubber expand, enhancing the seal. but Dishsoap would be the least destructive.

[Tony H]

What about silicone grease? It is used on O-rings in faucets, packing, etc.