Club 80-90 Forums

I have a petrol webasto engine coolant heater in my Doka. After it working great for ages it let me down at dubfreeze and i had no heat all weekend. Fannyed around with it for a while and thought the ecu was bust as no electric pulse was going to the pump. Then i realised if something was wrong with the unit the pulse may not be activated if a fault was detected stopping petrol being sprayed everywhere. Now i am no expert at this but when i took out this bit (what is it some sort of glow plug?) it looked like the problem to me,



I wire brushed it off and now it fires up a good un. What do you think caused it, just old age? And secondly do you think i should get a new one even though the other is clean and works fine?

jed

Jed ,I'd get a new one ,and put it in the glove box just in case

First question is what is it all over the plug ?
Second how'd it get there

I'd take the air intake pipe off (the one next to the exhaust) and look at what it is made of , could be that the linner is breaking down

Ahhhh yeh good thinking, its a carbony build up but to be honest its positioned behind the rear light outside of the van and it could have sucked some carp up when off roading maybe. I will have a good look at the intake hose though. Thanks

jed

ooerr! looks like you need to run your intake through a filter box.

I'd change it. You dont want to be let down buy that again. Or rather change it before next winter.

These things need servicing every year so it could be completely normal - if it was serviced you would notice.

Obviously i dont do anything with mine till it goes wrong....

Ringo

Interesting how the one in my petrol heater seems to be the same as the deisel one

http://cgi.ebay.co.uk/WEBASTO-DIESEL-HE ... 240%3A1318

jed

i can answer half the question Jed, the brain saw a fault with the glowplug, so stopped the rest from working.
what normally happens is the glow plug corrodes like that in your pic, then the coil breaks, making no circuit and the brain says "NO", but in your case, it went high resistance, and caused the shutdown.

that looks like water in the fuel to me, is the heater running through the engines fuel filter, has it got its own, or none other than the one in the pump??

Mocki wrote:i can answer half the question Jed, the brain saw a fault with the glowplug, so stopped the rest from working.
what normally happens is the glow plug corrodes like that in your pic, then the coil breaks, making no circuit and the brain says "NO", but in your case, it went high resistance, and caused the shutdown.

that looks like water in the fuel to me, is the heater running through the engines fuel filter, has it got its own, or none other than the one in the pump??

I think its before the fuel filter of the van (its that weird syncro filter that's hidden behind the rear arch that you spend days looking for when you first try and change it) but i think due to its position outside the van and the fact that the tray it sits on has a layer of silt on it, and the plug has only furred up were it sits against the air inlet pipe its sucked some carp up through their. I will pop a fuel filter on it just to make sure though as you have pointed out a good point and it will help stop any future problems if they should occur because of fuel anyway. While greenlaneing a while ago the wake in one really wet bit came just above the windscreen so it could have happened then i recon.

jed

its a stickleback