Please tell me I put my Injector Seals in correct

[dauber]

99 606 injectors rebuilt about 5,000 ago. I pulled the cover of the the top of the injectors to inspect the plastic breather tubing that is leaking and I found this in the third injector well (full of diesel)



I swapped out some return line from another injector to see if it was the new return line that I replaced at the same time with the injectors. With engine running it looks like bubbles at the bottom of this injector so I pulled injector to see if I installed the seal wrong and it I think its correct (above pic) and I re-torqued but I still get bubbles at the bottom of the injector.

This is what I think is the wrong way to install the injector seal:

[vstech]

I've never worked on a 606, but on the older seals, there is a small ring around the center hole. that ring faces the injector.
and if you removed, then re-torqued, the seals are dead, and must be either reset, or preferably replaced. they are a 1 time use only part.

[vstech]

the puddle of fuel must either come from the return lines, or the injector body. VERY unlikely to get a puddle from the heat shield (what you are calling a seal)
the most likely source is a chipped or nicked return line nipple, followed by a cracked nipple, then an injector body leaking... a LOT more air than fuel goes into the PC, so a heat shield leak would mostly blow air through a leak...

[whunter]

Originally Posted by dauber

Attachment 99671

99 606 injectors rebuilt about 5,000 ago. I pulled the cover of the the top of the injectors to inspect the plastic breather tubing that is leaking and I found this in the third injector well (full of diesel)

Attachment 99672

I swapped out some return line from another injector to see if it was the new return line that I replaced at the same time with the injectors. With engine running it looks like bubbles at the bottom of this injector so I pulled injector to see if I installed the seal wrong and it I think its correct (above pic) and I re-torqued but I still get bubbles at the bottom of the injector.

This is what I think is the wrong way to install the injector seal:
Attachment 99673

This is the correct way.


The heat shields are single use.
Once you (make contact) begin tightening them, if you back-off they are junk.

Attempting to refresh-reuse "used heat shields" is begging for BURNT injector nozzles.


.

[Simpler=Better]

Off topic:

Would it be dangerous to fire up an engine on used seals for say, 5 minutes to check timing?

[whunter]

Originally Posted by Simpler=Better

Off topic:

Would it be dangerous to fire up an engine on used seals for say, 5 minutes to check timing?

IMO; you risk BURNT injector nozzles if they are less than perfect (NEW).

Combustion temperature is an unforgiving fact.

Better safe than sorry.

.

[Simpler=Better]

Roger! $10 is a small price compared to new injectors

Originally Posted by whunter

IMO; you risk BURNT injector nozzles if they are less than perfect (NEW).

Combustion temperature is an unforgiving fact.

Better safe than sorry.

.

[dauber]

Anyone know what size that braided fuel line is? 7mm? I have some larger braided stuff but I want to be sure.

Also, If the injector body is bad and I buy a replacement I am thinking I will have to have it balaced to match the other 5 I just had balanced recently, correct?

[whunter]

Originally Posted by dauber

Anyone know what size that braided fuel line is? 7mm? I have some larger braided stuff but I want to be sure.

Also, If the injector body is bad and I buy a replacement I am thinking I will have to have it balaced to match the other 5 I just had balanced recently, correct?

3.2 OD X 1.9 MM inner diameter.

Gasoline weed whacker pink fuel hose will work, any hardware or Home Depot - Lowes will carry it.

.

[dauber]

These new heat shields or seal as the parts catalog calls them were replaced when injectors rebuilt. I only removed this one last night to see if it is the right way, which I now see that it was correct but now is junk. I ran the car at idle for maybe one minutes after I re-tourqued.

I will pick up a couple of new ones today along with some more new return line and reinstall, then see if it still leaks. If it does it sounds like the injector itself

[compu_85]

If the body is leaking it probably wasn't wet-sanded properly.

-J

[benedict]

Originally Posted by dauber

Attachment 99671

99 606 injectors rebuilt about 5,000 ago. I pulled the cover of the the top of the injectors to inspect the plastic breather tubing that is leaking and I found this in the third injector well (full of diesel)

dauber: Just out of curiosity: besides the smell of diesel after a drive, did your engine shake at idle as a result?

[vstech]

... 7mm is HUGE!
I'd think it's more like 3mm or 2mm.
either way, the buy parts link at the top of the page, should list the size for ya!

[dauber]

Well I picked up some new heat shields from the dealer, they wanted $4.89/each and had 4, but I talked them down to $2.12 each.

I tired to get some return line but had no luck at two separate hardware stores so re-arranged the ones I bought 6 months ago and put it together. No leaking or bubbles like I saw last night after a long drive and idling. So, it was either not torqued right or the head shield not seated properly or a return line-I have no idea.
Or maybe its a slow leak from the injector body and it will return. I am going to keep the cover off for a few months so I can keep an eye on it and wish for the best.

Charlie- I had the same idea in mind as I have owned VW's and had luck getting braided line at local shop. Didn't know about the Rabbit as the same size, so good to know.

[charmalu]

Well Iam not real sure on the Rabbit either but there sure were a lot of them around here at one time. assumed it would fit one, wasn`t into the VW of that erra. had a 67 and 69 Bug.

The NAPA store across from the VW shop also sells the braded line.

Charlie