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4th February 2023, 18:19 | #1 |
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High pressure fuel pump refurb - diesel
Hi,
So the clutch in the 75 diesel went and I am having it sorted next weekend. Started the car a few weeks ago to keep it ticking over and noticed a diesel leak - high pressure fuel pump is leaking! Ordered the o ring repair kit and special tool to remove it, got it out today and one of the screws holding the shaft in won't come out, going to get the impact driver on it to get it out but wanted to know if anyone knew where I could get a replacement screw as I'm not sure it will go back in and need to get it sorted this week if possible. Regards Jon
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4th February 2023, 18:37 | #2 | ||
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Personally from my own venture s into replacing the seals etc in the HPFP, i found out that the larger O-ring never needed changing, so if the bolt is really stubborn i would leave well alone. 1 2 However i changed them over seeing as i had already took the shaft out. 3 Changed the main seal as that was damaged. 4 Usually it's the ones in each chamber that need doing. 5 6
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Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise " |
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4th February 2023, 22:13 | #3 |
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Turns out the pump was missing an O Ring, see photos attached which may have had something to do with the leak, although I have been driving it for several years so not sure why it only started now. I'll get a spare screw from somewhere as I want to make sure all the o rings are where they should be.
Pump must have been off before? Regards Jon
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Previously owned. MG ZS 120+ 2004, MG ZT 260 SE 2005, MG ZR TD 2003, 2002 MG ZT CDTi Currently driving MG ZT-T CDTi Mk 2 2004 in Lagoon and Rover 75 2003. |
4th February 2023, 23:26 | #4 | ||
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I think i sent you a couple of photos regarding that larger O-ring on the regulator, i have a theory that they over time perish to nothing and that is why sometime you find black goo on the tip of the metal filter. 1 2 3 4 From your photos it looks like your has been leaking for a while.
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Arctic Givology Learn to Give Everything is Achievable ad altiora tendo. Check out our Nano meet dates http://www.midlandsnanomeets.co.uk/ http://www.the75andztclub.co.uk/index.php?thepage=howto " You do the work , we supply the expertise " |
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5th February 2023, 18:27 | #5 |
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Hi Arctic,
Thank you for the photos / info and yes quite possibly been leaking a while. I have managed to get a spare HPFP as I was not able to get that last bolt out, its completely rounded, and I wanted to replace everything just in case as it is quite tricky to get the pump out. That way I can get the bolt out when I have time, rebuild it and it can be ready for when the next one goes. Regards Jon
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Previously owned. MG ZS 120+ 2004, MG ZT 260 SE 2005, MG ZR TD 2003, 2002 MG ZT CDTi Currently driving MG ZT-T CDTi Mk 2 2004 in Lagoon and Rover 75 2003. |
10th February 2023, 07:58 | #6 |
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Leak is not from the main shaft. If the pump leaks from the main shaft the diesel will contaminate engine oil hence You will see an increase in oil level. If pump leaks, then the culprit is one (or more than one) of the heads of the HP pump (3 heads, see the good pictures provided by Artic.) For this jobs I would suggest a professional set of torx, better if "T" ones. Rounding torx usually means low quality spanners. It's an easy job lots of videos but takes time.
Hope this helps.
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