diesel smell when hot

mikeonb4c · Post by **mikeonb4c** » Wed Sep 19, 2007 2:21 pm

Just seen a diesel unit, with pics, on ebay and wondered if Lee or others who've doen this job could advise me if I am looking at the right parts for replacing o-rings. Here are the pics:

In the picture above, am I right in saying that the 'rounded diamond' shaped cover at the bottom of the pump has to be removed (by undoing what looks like 2 x hex bolts. Also, that this is the hidden side, where access is v tricky

In this pic, is it the cover with the domed top, situated at the bottom of the unit, that has to be removed. Again, is this the one that is visible and easy to get at and remove.

I'm still trying to work out what o-rings to walk in to my local motor factors and ask for (size and type). Are the o-rings the same type on both sides of the unit?

Any help appreciated - I'm not looking forward v much to this job

tridentlee · Post by **tridentlee** » Wed Sep 19, 2007 9:16 pm

hi mike, i still havent got around to doing mine yet as i have been busy pounding the streets of london and surrounding areas doing the taxi knowledge, the dome looking thing is where mine is leaking from, it may be leaking from elsewhere but untill i do the "o" ring behind the dome i cant tell, maybe this weekend if the weather stays good, ill keep you informed, lee

mikeonb4c · Post by **mikeonb4c** » Thu Sep 20, 2007 12:04 am

Good Man and Good Luck

Mike

pyroman · Post by **pyroman** » Thu Sep 20, 2007 8:24 am

Hi guys,

Spot on, they are the guilty ones!

It is tricky but can be done. Just be careful with the domed one, I think the component behind it is spring loaded, I am not sure, but take care in case. Last thing you want is to loose the springy thing down a hole.

Kal

mikeonb4c · Post by **mikeonb4c** » Thu Sep 20, 2007 2:24 pm

Excellent pyroman & thanks.

Mike

mikeonb4c · Post by **mikeonb4c** » Thu Sep 20, 2007 11:44 pm

Got sent some excellent photos by BF member Socket Set Sue, which BF member Antique had sent her a while back (well done that man & thanks to Sue). Thought I'd plonk them up on this thread.

With a ruler and a bit of detective work it should be possible to work out the size. I wonder why one of them is a green / silicon looking o-ring and the other is not. Any of you mechanical gurus able to comment?

Mike

smartmonkey · Post by **smartmonkey** » Fri Sep 21, 2007 12:11 pm

Either because they have different pressure ratings or one of them has been changed before.

mikeonb4c · Post by **mikeonb4c** » Fri Sep 21, 2007 1:49 pm

Thought so - hmmm, which?

tridentlee · Post by **tridentlee** » Fri Sep 21, 2007 1:51 pm

well done mike, that gives me more of a fighting chance to get the job done without losing all those springs, watch this space, lee

alphabetter · Post by **alphabetter** » Sat Oct 06, 2007 7:05 pm

I've just found that I have the same leak on mine while changing the coolant. I have a stupid question on this.

If you can get access without disconnecting the pipes is it OK to just remove the two O rings and replace them, or will fuel start spewing out once you release a certain critical bolt?

PS might also explain my rather poor fuel economy!

alphabetter · Post by **alphabetter** » Sun Oct 07, 2007 12:54 pm

...and PS - anyone got the part number of spec for the O ring?

BongoNess · Post by **BongoNess** » Tue Oct 09, 2007 8:43 pm

Hi guys,

Sorry I've not been on the forum for a while - hopefully this will answer some of your questions:

The dimensions of the O ring I took out are: Internal diameter 27mm; external diameter 32mm.

Only the inaccessible O-ring needed replacing on mine - I took the bell shaped cover off too, but this O-ring was fine. As others have noted - there were some springloaded components under the bell shaped cover so be sure to catch them and put them back in the right order.

Fuel will spill out as soon as you loosen the bolts - (more of a steady trickle than a "spew"), and continue to trickle out for some time after the covers are removed - don't worry it stops eventually. Definitely worth putting a tray under the van to catch the drips.

Both my O rings were black.

Cheers,
Steve

mikeonb4c · Post by **mikeonb4c** » Tue Oct 09, 2007 8:46 pm

I chickened out of doing mine last week after the horror stories of how inaccessible the 'back' one is. My dodgy back couldn't take 4hrs of bending over that hole. BongoNess - did you have to do any repriming of the fuel pipes or did you just reconnect and turn the key? And has it fixed te leak i.e. no other liekly sources of leak lurking down there somewhere. Thanks v much for the O ring sizes - that alone is a great help. Now, can I pluck up courage to try this one - gulp

tridentlee · Post by **tridentlee** » Tue Oct 09, 2007 8:56 pm

just got the phone call to say the the bongo is ready after its service, i also had the fitter at work do the "o" ring on the fuel pump & it seems that one of the previous owners had attempted this job before & had installed the wrong "O" ring ( the one behind the dome ) thus causing the leak, also had a new tail box fitted & fully checked over for the winter, the next job is for him to do the auto trans fluid, front and rear diff fluid, this is being done in a few weeks when he comes back from his well deserved holiday. lee.

BongoNess · Post by **BongoNess** » Tue Oct 09, 2007 9:09 pm

BongoNess - did you have to do any repriming of the fuel pipes or did you just reconnect and turn the key? And has it fixed te leak i.e. no other liekly sources of leak lurking down there somewhere.

Yes - the pump needs re-priming:

I managed to get mine started by attaching some clear tubing to the fuel return pipe, and sucking on it while I turned the engine over. Stop sucking when you see fuel in the pipe or when the engine fires, and turn the ignition off straight away before diesel starts pumping out the end of your tube....

It has fixed the leak - no more warm engine smell when I get out of the van.

Cheers,
Steve