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Author Topic: high pressure fuel pump reliability  (Read 969 times)

Offline ald1717

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high pressure fuel pump reliability
« on: February 16, 2022, 08:21:03 pm »
are the high pressure fuel pumps solid and reliable or do they fail eventually just like the lpfp?
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Offline colesey

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Re: high pressure fuel pump reliability
« Reply #1 on: February 17, 2022, 09:04:32 am »
The rubber shaft seals are prone to perishing, causing fuel to leak into the engine oil. No separate parts available to repair, so you need to buy a new pump.
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Offline ald1717

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Re: high pressure fuel pump reliability
« Reply #2 on: February 17, 2022, 09:07:49 am »
i think mine is okay then as i dont have petrol in my oil,
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Offline breeze

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Re: high pressure fuel pump reliability
« Reply #3 on: February 17, 2022, 01:59:52 pm »
A common failure is when the cam follower wears through. Then you can get the plunger for the HPFP touching the cam lobe. That is easy to check - either fuel actual vs specified values in VCDS or physically pulling it out and checking the pump plunger for wear.
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Offline ald1717

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Re: high pressure fuel pump reliability
« Reply #4 on: February 17, 2022, 06:10:47 pm »
changed mine 15000 miles ago, was just curious if they can fail and how
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