PDA

View Full Version : Diesel leak


Robbiepha
11-18-2014, 11:08 AM
I have a diesel leak in some kind of an overflow hose behind the engine near the trans... Can't figure out where the leak could be coming from. The sprinter runs well with no issues... Any ideas??

johnshmit
11-18-2014, 01:32 PM
Picture?

Aqua Puttana
11-18-2014, 02:03 PM
Picture?
Or at least model year?

MillionMileSprinter
11-18-2014, 03:17 PM
If it's an '02-'06, the tube comes from the injector wells. Looks like you have a leaky injector, injector line or injector fuel return hose. If you take the black cover off of the head, you will probably see where the leak is coming from.

Robbiepha
11-18-2014, 05:55 PM
Or at least model year?

It's an 06 dodge sprinter...I don't have pictures.

Robbiepha
11-18-2014, 08:26 PM
If it's an '02-'06, the tube comes from the injector wells. Looks like you have a leaky injector, injector line or injector fuel return hose. If you take the black cover off of the head, you will probably see where the leak is coming from.

I removed the cover, couldn't really tell where the leak was coming from but one of the wells was full of diesel...I will test and see if I have a bad injector... Thank you!!

Aqua Puttana
11-18-2014, 09:12 PM
I removed the cover, couldn't really tell where the leak was coming from but one of the wells was full of diesel...I will test and see if I have a bad injector... Thank you!!
It is not likely to be an injector proper. That is a fairly unusual failure.

Closely inspect the black tubing and fittings of the return system. If you mess with any of the black plastic fittings on the top of the injectors be very careful. Those fittings are often a bit fragile. They are sold as an assembly. Another place to inspect is the steel fittings. If you tighten any of those use two wrenches for backup so you don't loosen the threaded fitting.

If the leak seems illusive some people have used paper towel or cloth strips wrapped around the various fittings. The leak should wet the material.

Good hunting. vic

Robbiepha
11-18-2014, 09:38 PM
It looks more like the leak is from the steel fittings..I removed them and then tightened them back...one of them still look wet..why would they be leaking...

Aqua Puttana
11-18-2014, 10:27 PM
..why would they be leaking...

:idunno:

Failed component?

A marginally tightened fitting which eventually loosens up?

The injector gets a high frequency trigger signal that can cause vibrations, not to mention general vibrations of an operating engine.

vic

MillionMileSprinter
11-18-2014, 11:48 PM
It is most likely a cracked T fitting. I had one just randomly crack on me a few weeks ago. Here's a photo of what a cracked/brokn one looks like next to a good one. I had to dig the o ring and broken tip out of the top of the injector with a dental pic.

MillionMileSprinter
11-19-2014, 12:24 AM
...or it could be a loose connection at the fuel line. Just read your response.