DBESTGTI1
Go Kart Champion
With all the talk of intake manifold replacements, removing the intake to clean valves, ect. I thought I'd quickly document injector seals on a car I put an intake manifold on yesterday.
If you get lucky the injectors stay in the head and pull out the rail, that simple, pop the o-rings off and plastic washer under it and replace them (make sure the washer is the facing the same way). Lube up the o-ring before sliding the manifold with the fuel rail back on. That's the simple part, I'm not going into any more detail than that about it.
This is for if the injectors pull out of the head. Being a direct injection engine there is a 1 time use tephlon seal that seals the injector directly into the combustion chamber. If it pulls out of the head replace it.
Here's the tool
Here's the injector taken out.
Carefully cut the seal off with a razor blade.
Use some gas on a rag and clean the injector tip, make sure you clean the end good to make sure none of the nozzles are blocked.
This is where the tools come into play, you need the little pointy piece and the 3 circular bushing looking things. The pointy cone lines up witht he tip of the injector.
You slide the tephlon seal onto the pointy part and it will stretch it out so it can slide over the end of the injector.
From here it'll sit into place but it's not usable yet because you stretched it out, it wont fit in the head without damaging something.
This is where the bushing looking pieces come in, the insides are tapered slightly. Start with the largest one and basically turn it back and forth while pushing it down. Once the big one goes on move onto the smaller one.
Your doing this to compresses the seal back down to the proper size so they fit correctly. You can't do this by hand, you will not get the fit right. After cleaning out the injector hole in the head slide it back into place, do not lube it.
If you get lucky the injectors stay in the head and pull out the rail, that simple, pop the o-rings off and plastic washer under it and replace them (make sure the washer is the facing the same way). Lube up the o-ring before sliding the manifold with the fuel rail back on. That's the simple part, I'm not going into any more detail than that about it.
This is for if the injectors pull out of the head. Being a direct injection engine there is a 1 time use tephlon seal that seals the injector directly into the combustion chamber. If it pulls out of the head replace it.
Here's the tool
Here's the injector taken out.
Carefully cut the seal off with a razor blade.
Use some gas on a rag and clean the injector tip, make sure you clean the end good to make sure none of the nozzles are blocked.
This is where the tools come into play, you need the little pointy piece and the 3 circular bushing looking things. The pointy cone lines up witht he tip of the injector.
You slide the tephlon seal onto the pointy part and it will stretch it out so it can slide over the end of the injector.
From here it'll sit into place but it's not usable yet because you stretched it out, it wont fit in the head without damaging something.
This is where the bushing looking pieces come in, the insides are tapered slightly. Start with the largest one and basically turn it back and forth while pushing it down. Once the big one goes on move onto the smaller one.
Your doing this to compresses the seal back down to the proper size so they fit correctly. You can't do this by hand, you will not get the fit right. After cleaning out the injector hole in the head slide it back into place, do not lube it.
. I'm measuring the old seals on the injectors and the final diameter looks to be about 5/16". It would be real nice if i could just drill 3 holes in a piece of aluminum to form these things.
