Thanks @roadtripper and @DXX I don't have carista but did order one yesterday funnily enough. I'm no mechanic but figured it would be maybe useful. So I don't know if it was doing a regen. But have read similar on other threads so makes sense. It's booked in now with VW at end of the month. Hopefully they'll be of the same mind around the EGR @DXX. I'll certainly mention that.
Coolant leak - Investigation ideas
- Thread starter Crippso
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- coolant leak
It’ll be much cheaper at an independent VW specialist.
Hi all,
So the van went into a VW commercial van centre today. They called at lunchtime to say they found the problem. Confirmed coolant leak in the EGR. Whilst not ideal, I'm just happy to now know what the issue is. Hopefully that will solve it.
I know a few people on here suggested it would be that. So you were dead right!
Thanks
Stuart
When you say pressurised - do you mean any pressure at all? Or a really obvious amount with bubbles etc? Sometimes Im getting a very light hiss as I open the cap, but not anything dramatic
I think a little hiss is normal, mine was quite obvious it was under a lot of pressure when you took the cap if when cold. Also colour of the coolant went from bright pink to a muddy brown.
If you suspect head gasket, would recommend getting the combustion test. Mine was quite clear the liquid change from blue to green. See picture
Mines been leaking -Short wheel base T28- for ages- nearly a year, constantly losing coolant- no signs anywhere of leaks, been to about 3 garages and finaly after verifying yes leak is present after over night pressure test down to 1.5 from 15 overnight, bottle cap changed, bottle tested independently= ok, hydrocarbon test was OK no contamination. So opted for the EGR Cooler change with VW original part ( 1 year earlier had the EGR changed) , hoses bends, gaskets the lot at £1k+ hoping this would be it.
Nope, thought it was sorted until1 week later- full top up required and same next week. Back to garage who are getting a VW warranty change as they reckon the new VW Original part that was just fitted is leaking internally. So fingers crossed for next week when it goes in to VW Commercial. Will keep you posted on how it goes.
Nope, thought it was sorted until1 week later- full top up required and same next week. Back to garage who are getting a VW warranty change as they reckon the new VW Original part that was just fitted is leaking internally. So fingers crossed for next week when it goes in to VW Commercial. Will keep you posted on how it goes.
Interesting- When did you last change the water pump? Some coolant leaks are hard to trace as the coolant evaporates as it’s leaking. I like to hear when you get the cause of the loss. Good Luck.
Posted on another T6 Forum thread but trying to spread the word.
So been getting coolant loss 200ml per day of long distance driving. VW Commercials did a diagnosis and said needed an EGR replacement. This done but coolant leak still there. No visible sign of a leak and no mayonnaise in the engine oil. Think I can smell coolant in the exhaust. Not seen any bubbles in the header tank when running the engine with the tank cap removed. 150 ps engine. 48k miles.
Any thoughts?
So been getting coolant loss 200ml per day of long distance driving. VW Commercials did a diagnosis and said needed an EGR replacement. This done but coolant leak still there. No visible sign of a leak and no mayonnaise in the engine oil. Think I can smell coolant in the exhaust. Not seen any bubbles in the header tank when running the engine with the tank cap removed. 150 ps engine. 48k miles.
Any thoughts?
Hey, sorry to hear you’re having issues. I feel your pain as it can be a nightmare to pin point.
Did VW actually pressure test the Egr to confirm it was that before replacing? Otherwise I would say you have a case for misdiagnosis.
When you say you see no bubbles in the header tank, have you actually put a combustion test kit on it and checked to see if the liquid changes colour? If not I that might be a good test to do first. As mine had no visible bubbles.
Did VW actually pressure test the Egr to confirm it was that before replacing? Otherwise I would say you have a case for misdiagnosis.
When you say you see no bubbles in the header tank, have you actually put a combustion test kit on it and checked to see if the liquid changes colour? If not I that might be a good test to do first. As mine had no visible bubbles.
VW did a diagnosis and said after a pressure test that the EGR needed replacing.
Will look into the Combustion Test kit. Thank you
Will look into the Combustion Test kit. Thank you
So update- VW Commercial found no issues with the replacement unit fitted so garage checked it out and found no signs of leaks. So I got van back with FULL topped up coolant- and some 4 weeks later back to coolant loss- booked back in again to garage. The SAGA continues.
Have you looked around the water pump area for tell tale signs. If your van has an under tray and you remove it, there can be indications of a leak causing staining and dampness . Have you carried out an overnight pressure test?
Post in thread 'T6 150 - Coolant leak & Block test.'
T6 150 - Coolant leak & Block test.
T6 150 - Coolant leak & Block test.
yes various garages checked for obvious issues. There is no stains or signs of leakage so I think it's leaking under pressure and evaporating or it's something similar inside the workings.
Update - van back to original garage and they can't see anything causing the loss..I await the next step in the Coolant SAGA.
Similar experience. VW Commercials diagnosed and EGR failure. Fitted new EGR +£1900!!! but still losing coolant. Van going back next week. Does not look like head gasket or cracked cylinder head. As you say the saga continues.
Would be grateful if you keep me updated on your outcome. I had got my EGR done the year before.
Will do. Local garage says it is not the water pump, also no visible leaks. Suggestions include the Charge Cooler and the Intercooler - not that I know what these are. Turbo has been suggested but that might also the the same as one of the other suggestions.
it seems to me that it could be any one of 8 or 9 things and to find out which you need to go through them one at a time- no sure thing way of identifying the culprit.
De careful where you get your information, the intercooler IF you have one is air cooled. The Charge Air Cooler is liquid cooled.
Both do the same job, but named differently on Transporters. You won’t have both, depends on enging type.
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