Cut & paste from the brick-yard. T:where can these be found/what are they?
cheers bud.T:Cut & paste from the brick-yard. T:
Direct Link To This Post Topic: Diesel Return (leak off) pipes
Posted: 30 Mar 09 at 13:16
Just having a break while trying to track down my diesel leak. Couldn't find anything obvious causing a pool of diesel sitting on the side of the block at the pump end. No drips visible when running engine and once soaked up doesn't make another pool of diesel while watching engine run.
After a very close look I could see the leak off pipes from 3-4 4-5 5-6 had very slight shiny spots on them like atomised water (calling no.6 the pump end). Engine not been started for a week so must be diesel leaching through the wall of the pipes. 5-6 was worse which is the area where the pool of diesel sat under.
When I got the pipes off some were soaked in diesel and if I squeezed the pipe in a a pair of pliers diesel oozed out like squeezing a sponge full of water. Obviously pipes perished. I've replaced these pipes and the one going from injector 6 back to the pump and also the end cap on no.1 as there was a very slight mark of wet diesel on it's bottom edge. I've replaced those caps many times. They don't seem to last more than 18 months. Need a good quality source of them as sure the one's in car shops are cheap chinese . Not replaced pipes between 1-2 or 2-3 as they are bone dry and I replaced them a couple of years ago. Might do them later, but now keen to get cleaned up and see if she starts easily. The original problem was difficult to start if left for more than a day. Post here Started fine within 24 hours and ran perfectly when going, except for the diesel pool and of course a slight whiff of diesel.
Fingers crossed this was the problem. Certainly couldn't have helped.
Those leak off pipes are such a problem. Either they are unreliable or I have been buying poor quality pipe and end cap. My advise to all is to always keep a leak off set on board. At least until we find VW quality pipe and end caps.
Half hour later:
Started fairly well. Just a few goes to get the air out. Only know for sure if it's cured the fault by leaving it a few days and trying again. Suppose I could take it for a drive and see if the pool of diesel returns, but got it covered up and too much hassle to move it.
Found the packet that the pipe and end stop plug came in. It's made by Mafco. www.mafcobell.co.uk
Seems a fairly reputable firm, but parts don't last on my van. I've had two now and they go within 2 years.
That's just rubbish. It's the same fuel. Comes from the same refinery.Also avoid supermarket diesel. Don't get anywhere near the mileage you get from decent stuff.