Intake runner confusion?

[LeakProof]

Hey guys,
Am I missing something here that still needs to be disassembled or is this the extent of it. Really not sure how a hex wrench and loctite 620 play in to this?
I removed one injector, two o-rings and a guide. The rest looks like part of the aluminum casting.
Do I just jam the new guide back in?
Do you think it's a good idea to check all the injectors for proper spray and change out all the brittle guides and o-rings?

Thanks,

Leakproof.

[psalt]

Hey guys,
Am I missing something here

Yes, the injector sleeves are staked in and you need to grind down to stakes before you pull the sleeves or you may ruin them. Unlike other CIS OEM's, Porsche chose this method to insulate the injectors and the outer O rings usual bake and leak well before the injector seals. I would grind the stakes, replace the sleeves and O rings and stake the sleeves with a square punch. Then replace the injector seals and pass the wiggle test.

[LeakProof]

Ah man, isn't anything ever easy!
Thanks for the response psalt, But I have no idea how to do what you just said.
Perhaps this is best left to the professionals? Machinist that is.
Maybe I'm just intimidated by my lack of understanding.
Can you or anybody else explain in further detail?

Much appreciated,

Leakproof.

[LeakProof]

After studying the sleeve further I think it's starting to make more sense to me.
I'm hoping the sleeve can be saved and re-used once removed?
I'm thinking of doing all of them on this rebuild. Why not, The guide O-rings are disintegrating, the guides seem to be brittle and the injectors probably should be cleaned,tested,and/or replaced?
I'm starting to think machinist.

Leakproof.

[Walt Fricke]

Leakproof

Paul said all you really need to know. But:

You can see the "stakes" in your photo. They are just deformations in the aluminum after the insulators have been installed, and serve to keep the insulator in place when you are pulling an injector out. You can find something - some kind of punch - that will restake new/replaced ones. But you should grind the old stakes off before replacing either old or new ones, lest they be damaged during installation.

My take is that any of the plastic insulators which came out in one piece can be reused. But if you are pulling them in order to replace their outer O rings, it is best to have a few spares on hand, because there is a decent chance of breaking one.

I kind of favor leaving these alone, as long as they stay put when you pull an injector. When they come out with the injector, you have to do something, of course.

Walt Fricke

[euro911sc]

Circled in red you see some dimples. File those down so it is smooth. There is a 3rd one somewhere in the blue circle. Treat it the same and file it down. Then, when your new sleeve is in place, you will recreate these with a punch. I use an automatic center punch like this one from Harbor Freight:

- Harbor Freight Tools - Quality Tools at the Lowest Prices

$2.99 is hard to beat No need to really make a huge dent here. Just a little one in 3 spots is enough to keep it in place for the next 20+ years

Enjoy!

-Michael

[dtw]

Injector blocks, seals, and o-rings should all be replaced. No machinist required. Just reread the thread and grind off those little nubs.

The blocks tap out with the right sized drift (or screwdriver handle) after that.

[LeakProof]

Sometimes I can be a little slow at understanding simple things, dense perhaps.
But thanks to you guys, You certainly helped to clear this up.
As usual, much appreciated.

Leakproof.