Injectors Rebuilt Twice....Still Leak...I'm stumped

[Quantum TD]

It that's the case, then it sounds like they didn't lap the surfaces properly.

[Doakster]

It that's the case, then it sounds like they didn't lap the surfaces properly.

The hard part is that they can't get them to leak on the test stand, but they do in the car. after about 3 mins of run time.

If they can't get these things to work then I might call Giles and see what he can do for me.

[Rabbit TD]

It that's the case, then it sounds like they didn't lap the surfaces properly.

The hard part is that they can't get them to leak on the test stand, but they do in the car. after about 3 mins of run time.

If they can't get these things to work then I might call Giles and see what he can do for me.

I just looked at your original post out of curiosity and yes I thought you said all 4 are leaking.  It kind of sounds like there might be some wrong parts in there or something made at the wrong spec., possibly not Bosch nozzles maby   I wouldn't think as many times as these things have been retorqued and such that all 4 would still leak.  One or two maby but still all 4 I think there is something wrong in there or their idea of lapping is to use a bench grinder or something close. 

[Doakster]

I'm actually not sure if they are bosch nozzles or not in there. I'll have to ask, I'm still waiting back for a phone call from them on what they find.

I'm not saying they are doing everything correctly but I have no reason to expect they are not assembling them correctly, they are a real stand up shop and so far have been willing to help out, this also isn't the first set of injectors they've done or the first set of 1.6 injectors they've done. I really can't say they are doing anything wrong because I'm not there to watch them lap the injectors. However with all that said I'm patient but am getting a little irritated.

Also the first time around only 2 of the injectors leaked at first, with run time all four stared to leak, the second go around all 4 leaked.

[blkboostedtruck]

if you cannot get them fixed right ! I can fix them if they are still fixable?
I've done quite a few for guys here on the board!
Gile's is an excellent choice but he accross the boarder witch i'm in wisconsin!
shipping will be cheaper!
thanks Duane

[Rabbit TD]

if you cannot get them fixed right ! I can fix them if they are still fixable?
I've done quite a few for guys here on the board!
Gile's is an excellent choice but he accross the boarder witch i'm in wisconsin!
shipping will be cheaper!
thanks Duane

I bought a set last Winter straight out from Giles with no cores sent up or back and from what I remember shipping was only around $20 or so, less than I thought it would be but you need it both ways I guess   I'm sure a lot of reputable places today also get some low quality parts from their suppliers that originaly was better stuff before even unentionaly.  It's happening almost everywhere in almost every type of product there is.  Even in aviation related things from what I've read unless you know what you are looking at or who you are dealing with but things are changing everywhere and not for the better.  I'm so depressed right now about this I think I'll go hang myself, if I can find some decent quality rope

[Vincent Waldon]

The hard part is that they can't get them to leak on the test stand, but they do in the car. after about 3 mins of run time.

I've seen this once before... lapped, tested completely leak-free on the stand... confidently shipped them to the customer, who reported that a couple of them started leaking after about 10 minutes of run time.

Very annoying... fixed by me re-lapping, after which I ran 'em in my own car for a week to convince myself that I had it fixed.

My theory at the time... test stand cold.. engine after running for a few minutes hot... so perhaps if they were on the edge when cold warming them up exposes the problem.

[derekp]

I had similar problems with a set of rebuild injectors.

Sadly the person that did them apparently knew they were leaking cause the bodies had been torqued together to 130 ft lbs. (Yes, you read it right) and they still leaked at the bodies.

upon disassembly, I saw that (apparently) sandpaper had been used to "lap" the surfaces leaving scratch marks in the internal parts so deep that it would have taken a long time to get them smooth again.

It cost me having to throw away those complete assemblies - further the overtorquing caused the bodies to warp as was evidenced by the tigtening pattern found on the internal parts.

From my past experience of dealing with 2 differrent "shops" I'd take what you have and go somewhere else for another set of eyes to look them over.
It sure sounds like they are scractched or the bodies are distorted.

[Doakster]

Talked to Giles last night, and I've made the decision that I'll be sending them to him. I should have done that in the first place because he is about $100 cheaper than i originally paid.

[Mark(The Miser)UK]

If you take an injector apart and 'blue' the mating surfaces and then reassemble, and torque up to 30lbft, then redismantle; the leak areas will show up as blue...

[Rabbit TD]

Talked to Giles last night, and I've made the decision that I'll be sending them to him. I should have done that in the first place because he is about $100 cheaper than i originally paid.

You're exactly right and most of all you know what you will be getting and they are pop tested.

[Doakster]

Talked to Giles last night, and I've made the decision that I'll be sending them to him. I should have done that in the first place because he is about $100 cheaper than i originally paid.

You're exactly right and most of all you know what you will be getting and they are pop tested.

Sent them out to him today, and he's even going to run them in a motor to ensure they don't leak. Good stuff.