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Old 20th October 2020, 12:37   #11
Arctic
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Originally Posted by Mike Noc View Post
No that's the HP sensor. The regulator sits on the back of the engine driven HP fuel pump. The front shaft seal can also leak on the high pressure pump, but you won't find that leaking to ground, it just fills up the sump.
As Mike stated above its on the back of the high pressure fuel pump, photos below.

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that is if its the regulator it could be one of the main chamber seals?

Also check in and around the injectors but from the area you have stated the leak is from sounds more like the HPFP.

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Old 20th October 2020, 13:13   #12
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Great photos as ever Steve.
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Old 20th October 2020, 13:51   #13
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Slip a large piece of cardboard under the engine. When it drips it will give you an accurate guide to where the leak is. Also try to set fire to a small piece of the wet cardboard. If it burns then it's diesel.---

Just to point out that this may sometimes work. Usually not though, it just tells you which point on the subframe it runs down to before dripping.


I agree with Arctic, it's most likely source is the HP pump regulator or pump itself. The pump has three caps with multiple o rings to seal them. Is a pain to take off and replace (unless you've got 2 people doing it that have just done it 3 times in a row - you can get it down to 45minutes...)
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Old 20th October 2020, 17:08   #14
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Reeet thanks for that Arctic and rest, looks like the HPFP regulator can come off without disturbing entire pump so will grab a seal kit linked and get that bit done when i do the Aux belts and tensioners very shortly.


I cannot see any moist fuel pipes, lines or seals looking from above with bright torch and watched the HP pump a while with engine running, no bubbling from seals nothing to see so if it is failing must be underneath or engine side also keeping eye on engine oil level only changed it last week.


When i take engine mount off to do belts will have a good look then and if HPFP needs to come out guess it will come out, be a first for me but removal tool looks cheap enough (he says).



Changed gear box oil today seems to have made gear changes bit easier we'll see, nasty oil came out for sure at 164K now no idea when last it was changed.. Totally delighted to find MTF94 in our local "pound shop mega store" carlube style!


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Old 20th October 2020, 17:30   #15
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(unless you've got 2 people doing it that have just done it 3 times in a row - you can get it down to 45minutes...)
HAHA - i remember that!
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Old 20th October 2020, 20:26   #16
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Reeet thanks for that Arctic and rest, looks like the HPFP regulator can come off without disturbing entire pump so will grab a seal kit linked and get that bit done when i do the Aux belts and tensioners very shortly.


I cannot see any moist fuel pipes, lines or seals looking from above with bright torch and watched the HP pump a while with engine running, no bubbling from seals nothing to see so if it is failing must be underneath or engine side also keeping eye on engine oil level only changed it last week.


When i take engine mount off to do belts will have a good look then and if HPFP needs to come out guess it will come out, be a first for me but removal tool looks cheap enough (he says).



Changed gear box oil today seems to have made gear changes bit easier we'll see, nasty oil came out for sure at 164K now no idea when last it was changed.. Totally delighted to find MTF94 in our local "pound shop mega store" carlube style!


I think the engine mount stays on with belt renewal.---
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Old 20th October 2020, 20:50   #17
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Does it have a webasto ! .the leak looks to be in the right from the pattern on the cardboard .I would love to have a look bu I'm too far away
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Old 20th October 2020, 21:17   #18
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I think the engine mount stays on with belt renewal.---

Yep no need to touch the engine mount to change the belts. I just remove the undertray.
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Old 20th October 2020, 22:34   #19
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I think the engine mount stays on with belt renewal.---

This is my first go i fancied going in from top once have loosened the AC tensioner as there is squeeky idler or tensioner to resolve, take a look at photo below.



Im sure well practised members could do it in the dark with one hand tied behind back who knows i might take another look with fresh eyes soon.



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Old 20th October 2020, 22:51   #20
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Does it have a webasto ! .the leak looks to be in the right from the pattern on the cardboard .I would love to have a look bu I'm too far away

No webasto the leak drips off front left of centre on forward edge of sump pretty sure its HPFP related, optimistic for the pressure regulator seal a cheap fix to try.
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