Injector Cleaning

[silentdub]

I'm tearing down my 1.6 and was wondering if you can just clean the injectors?


I am not used to these types of injectors, most gassers either work or don't work and you usually just toss them. These injectors are not electrical, so I am betting that they are open by pressure?


I'm not sure what to do here.

I searched and didn't find anything specific on cleaning them.

[nathan_b]

test, if worn out, rebuild

[silentdub]

test, if worn out, rebuild

The injectors can be rebuilt? Parts? DIY? Kit?

[southernman]

Priior to determining if the injector can be cleaned, you need to take them to an injector shop, which has the tooling to test the injectors spray patterns - and to check for leaks (dripping post closure). Any shop that rebuilds injector pumps will have the equipment to test and rebuild injectors.

I had mine recently checked and only one had a good pattern and two dripped after they were closed. The latter might not seem like a bid deal at first, but if they drip when cold, they drip right on to the glow plug and will make your engine hard to start.

Any competent injector shop can test and rebuild your injectors. The key here is being able to test (visually verify) the injector spray patterns once rebuilt. My local shop charged me $150 to rebuild and test my injectors - plus, I've got a warranty in the event there's a problem. Also, don't forget to use new washers with your rebuilt injectors. The end result will have it purring like new and returning the fuel mileage we all value so highly.

Southernman

[Mark(The Miser)UK]

Look up Hartridge. They sell diesel refurbishing tools. Easy to dismantleinjector and clean using Mr Muscle ovon cleaner, swill with diesel and reasemble. Buy a pressure tester...

[silentdub]

Gotcha, Thanks!

The ones on the engine have 150K+ on them. I didn't know if there was a method to the madness or not.

I don't have any special tools for Injector pumps or injectors, so I may need to have someone do it.

[rabbitman]

Gotcha, Thanks!

The ones on the engine have 150K+ on them. I didn't know if there was a method to the madness or not.

I don't have any special tools for Injector pumps or injectors, so I may need to have someone do it.

It's time for new or rebuilt ones.

Making a pop tester is lots of messing around and popping them is even more messing around so if you have more money than time and don't plan on ever doing a set again then you should have someone else do it.

[mystery3]

If your schedule allows I'd send them to Giles at Performance Diesel Injection for rebuild. I've bought rebuilt sets from reputable vendors and they've been less than perfect straight from the box.

[Mark(The Miser)UK]

Gotcha, Thanks!

The ones on the engine have 150K+ on them. I didn't know if there was a method to the madness or not.

I don't have any special tools for Injector pumps or injectors, so I may need to have someone do it.

One thing you can do is check the injectors spray pattern by taking them out and reinstalling them on the fuel lines with the fuel lines 180 deg out ie upsidedown.

Put an old blanket under and get someone to turn engine over. Any poor nozzles will be easily seen. Bad ones can be cleaned with oven cleaner and bicycle spokes with end hammered and filed to a 60 deg point. Flush and reassemble and retest.

[silentdub]

Not to sound like an ***, but why not just buy the rebuild parts and rebuild them regardless of testing?


Does anyone sell a rebuild kit?

[92EcoDiesel Jetta]

Rebuilding injectors is replacing the worn nozzle with a new nozzle, cleaning setting opening pressure via shims and checking spray pattern and making sure no drips. Parts needed are new nozzles, various shims, new heat shields. The injector bodies are re-used. You can buy or make your onn tools to rebuild the injectors yourself. As far as nozzle goes, it will be very difficult to find German or French made Bosch nozzles (mayne NOS if you can find them), otherwise they will be from India, Brazil or wherever Bosch have them made these days. AFAIK, Monark nozzles are German made with an excellent reputation. I just bought a set and they're in the mail but my head gasket just blew while the nozzles are in transit.

Take a look at this link since you're new to diesels

http://www.vwdiesel.net/forum/index.php?topic=16687.0

[Luckypabst]

You need one of these, or some variant, to rebuild injectors:



 If you're only doing one set of four, you'll be ahead of the game to buy a rebuilt set. My experience is that Bosch rebuilts need to be rebuilt out of the box. Best to send your used injectors to a legit diesel shop and have them done by someone who cares.

Chris

[silentdub]

Thanks guys, this may be my first Diesel of many, I'll send the pump and injectors out this time, if I get further in to it, then I will invest.


Thanks again for the quick responses!

[wdkingery]

Gotcha, Thanks!

The ones on the engine have 150K+ on them. I didn't know if there was a method to the madness or not.

I don't have any special tools for Injector pumps or injectors, so I may need to have someone do it.

One thing you can do is check the injectors spray pattern by taking them out and reinstalling them on the fuel lines with the fuel lines 180 deg out ie upsidedown.

Put an old blanket under and get someone to turn engine over. Any poor nozzles will be easily seen. Bad ones can be cleaned with oven cleaner and bicycle spokes with end hammered and filed to a 60 deg point. Flush and reassemble and retest.

this is the kind of info you need!

[rabbitman]

One thing you can do is check the injectors spray pattern by taking them out and reinstalling them on the fuel lines with the fuel lines 180 deg out ie upsidedown.color]

The upper coolant hose gets in the way.