diesel smell when hot

tridentlee · Post by **tridentlee** » Sat Sep 08, 2007 12:29 pm

i have a strong smell of diesel when engine is hot, i also have a small amount of something dripping onto my driveway, i have just done a search using the words DIESEL AND SMELL & i came across a post saying about some rubber "o" rings on the pump that may need replacing, just wondering if this is definatley the right post on maybe sorting out my problem, any info would be greatfully recieved, cheers, lee.

pyroman · Post by **pyroman** » Sat Sep 08, 2007 1:47 pm

Hi,

I run mine on veg oil and I too could smell fuel when the engine was hot, although I could smell cooking oil

In my case it was an 'o' ring on the side of the injection pump that had perished.

I replaced it and the problem was sorted.

try 'fuel injection pump' or 'leaking pump' on the search engine, it might bring up relevant articles.

Hope this helps.

Kal

tridentlee · Post by **tridentlee** » Sat Sep 08, 2007 6:11 pm

hi kal, thanks for that, is it a very easy job to do? & can i get the o rings from any motor factor, cheers, lee

pippin · Post by **pippin** » Sat Sep 08, 2007 7:19 pm

fuel AND injection AND pump

or

leaking AND pump

are the correct methods of SEARCH

pyroman · Post by **pyroman** » Sat Sep 08, 2007 8:57 pm

Hi Lee,

Yes to both, might be a tight squeeze if you have big hands.
I did not do the work, a friend did it and said it was tight, but he did say it was just two bolts.

Kal

Thanks to Pippin for the search engine tips, no wonder I have struggled to find that elusive topic!

mikeonb4c · Post by **mikeonb4c** » Sun Sep 09, 2007 12:16 am

Very pleased to read this thread. Mango Bongo is showing the same symptons (has for some time but I thing it is worsening - hadnt noticed drips underneath until recently). I was going to post about about it but thought I'd wait until I had a look at the engine tomorrow. One of the problems is that the whole area seems to get a bit wet and it will be hard (I suspect) to identify the source of the leak. Is there any chance of a pic of the place where the dodgy O ring is situated, plus how your friend did the job pyroman? Mind you, reading previous threads, it sounds like something I might not have the skill and experience to try myself

tridentlee · Post by **tridentlee** » Sun Sep 09, 2007 11:08 am

this is the post that i found, lee
http://www.igmaynard.co.uk/bongo/forum/ ... highlight=

pyroman · Post by **pyroman** » Sun Sep 09, 2007 8:12 pm

Hi Lee,

Thats it, I remember cos I used the advice given on that very thread.

This site is soooo cool!

Kal

pyroman · Post by **pyroman** » Sun Sep 09, 2007 8:15 pm

Mike,

It did not look too hard actually, the one on the offside was under using an allen key and the other one (near the engine was the same key but very hard to get to due to small space. I think my mate had to remove the main fuel line that goes into the fuel injetcion pump to get to it. I had to hold a dentists mirror ( from Maplin ) for him to see where he was.

Kal

tridentlee · Post by **tridentlee** » Sun Sep 09, 2007 9:35 pm

thanks all , i will tackle the job this week sometime, cheers, lee

mikeonb4c · Post by **mikeonb4c** » Sun Sep 09, 2007 9:53 pm

Lee & Pyroman - brilliant and exactly what I needed. I was about to post a pic of the exact same thing as on the thread you found, Lee and that I had taken earlier. And I knew that although the diesel I found was on the 'dome shaped thing' that I couldnt assume it had orginated from there - but if not then where! This thread makes it pretty clear and I should now know what to do - lets just hope I can manage it on my own.

My leak doesnt seem serious or needing immediate attention. Interestingly, I think it seems to be more of an issue after a long motorway run though I cant think why. But I'd like to do it at some point.

Could I ask a really big favour Lee. If you are doing yours and you identify a source for the O rings, I'd be really pleased to have some too and would (obviously) send you cost + postage. Alternatively, any advice on what size they are (I dont know how it would go if I walked into my local motor factors and just said I wanted O rings like they use on caterpillar trucks!). Also interested in any tips on how you get on.

Good luck with the job & hope it sorts it.

Mike

BongoNess · Post by **BongoNess** » Mon Sep 10, 2007 4:55 am

Blimey - it must be the season for fuel leaks from the fuel injection pump... Moved the Bongo on Saturday morning and noticed the drips underneath - found the source and thought "I bet someone on BF knows how to fix this". Took a photo and came inside - did a quick search on "Fuel AND Leak" and lo and behold - the exact same photo as I'd just taken was there on the forum...

"Just remove the two bolts on the engine side and replace the O ring" it said...

Brilliant I thought, so back out I went with me 10mm spanner....

Four hours later, much swearing and contortionism, one broken spanner and it was fixed....

Tips for anyone else attempting this job at home...

The O ring is the same size as the one that comes with a replacement fuel filter - I had an old one in my tool box from the last service which went in and stopped the leak fine.

Get some really small hands!... Mine are pretty slim, but it was a b***tard of a job getting the bolts out, even with a ratchet 10mm spanner.
In the end I disconnected all the fuel pipes (including the metal ones to the injector) and loosened all the mounting bolts to give myself a bit more space - beware though - some of the mounting bolts are almost as inaccessible and if you don't align the pump properly when you tighten them back up the fuel injector timing will be out...

Be prepared to loose a bit of diesel onto your drive - some kind of drip tray would be wise...

A torch is useful for finding the O ring after you've dropped it into the bowels of the engine bay...

The workshop manual tells you to perform an air bleed proceedure after messing about with the fuel pump, but it doesn't say what this proceedure is. 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....

That's the hardest O ring I've ever had to replace - it definitely wasn't the 5 minute job I thought it would be, but then they never are are they...?

Best of luck...
Cheers,
Steve

mikeonb4c · Post by **mikeonb4c** » Mon Sep 10, 2007 8:32 am

Thanks Steve - a great addition to this thread / topic. Am I right in saying that you did BOTH O rings, and that it wasnt hard to do the one in the photo (the dome shaped thingie) but that the one around the back was the hard one.

The whole job sounds a little scary for a rookie like me - esp the bit about the injector needing tightening back in the same position or the timing will be out. Could be a recipe for problems for the inexperienced?

I wonder if my local garage might be a better bet, and I can print out the advice on here (not the bad bits

) so they know what wants doing.

Steve - I presume that having done the job, the leak has stopped ?

Anyway, well done mate. I'll bet Lee is really looking forward to doing the job now - I know I am......NOT.

Mike

pyroman · Post by **pyroman** » Mon Sep 10, 2007 12:19 pm

Wow Steve,

Sorry if I made it sound too simple, my mate said it was a b***er too!

He still moans about his hand now

Glad you got it sorted though.

I thought mine leaked because I use 100% veg oil as fuel, but it seems that it occurs with regular diesel too.

Kal

tridentlee · Post by **tridentlee** » Mon Sep 10, 2007 6:40 pm

found the leak, just under the dome, it only starts dripping when revved up, all the time it is on idle no drip, this is when engine is cold, i will attempt the fix later this week or have a chat with the truck fitters at work to see if they want to earn some beer money, watch this space, lee

diesel smell when hot

diesel smell when hot

Diesel smell

'O' Rings