Thread: TD5 Fuel Pressure Regulator Leak

I've never heard of them stopping the engine,guess I was luky getting another year out of mine!!

Originally Posted by 3-Gees

Having done two regulators over the past 6yrs, I would say that a kit will not fix the leak 99% of the time.The leak is inside the pressure vessel itself ,not the external O rings,I have cut both reg's apart and inside is a shaft that wears and can no longer seal on the internal o-ring ,then drips out of the weep hole.

A repair kit would therefore fix the problem, provided you purchase a complete repair kit and not just new seals.
A complete kit includes all the seals and a new complete regulator component (the cylindrical shaped unit with the diaphragm in it).
The only reason to get a complete new unit is if your hoses are worn or there is damage to the housing and/or temperature sensor.

As far as I know ,you can't buy the genuine regulator by itself?.,there is a non -genuine unit around but it is not very good apparently. Also you have to remove the block to remove the regulator anyway,so I figure new hoses are a good idea as I blew one on my last trip away!.If you could get to the regulator easily,then a cheap replacement could be an answer...but being the job from hell that it is ,I don't want to do it more than necessary!
If you can buy a genuine regulator by itself,and your hoses are ok...show me the money
Chers Gregg

I'd say the genuine regulators are not very good either, just look at the failure rate! All round it's a pretty poorly designed low quality part both genuine or not.

But you can buy a genuine replacement (or as close to). It is a Bosch part (not actually made by Land Rover), and the exact same unit is also used on various Audi and VW vehicles - however it has a hose tail on for them which you just need to cut off if you want it to look original (alternatively, many put a hose onto it and run the hose away from the starter motor, this avoids the FPR from dumping diesel onto the starter motor in the even of a leaking diaphragm). It's widely available as a replacement for these vehicles. The Bosch part number is 0280160575:



Theres even a place in Gauteng in South Africa that makes adjustable regulators to suit. They can set them to any pressure you like (or you can after purchase by adjusting a nut) and rebuild them.

In saying all that though, there is some concern that the Land Rover actually runs at 4.2bar pressure, not 4bar, when the Bosch units available are only 4Bar so 0.2Bar lower pressure which would result in a bit of a loss of power as not quiet enough fuel would be going into the engine. I have yet to confirm this though.

On an early model D2 without the third hose it's changeable within an hour (I did one on Monday for a mate). On a late model with the hose under the inlet manifold it's a much larger job if your changing that hose - at least twice as long. I know plenty of mechanics don't bother changing the hose due to the additional PITA and the cost to the customer.

However, the third hose can also be rebuilt. I have had one rebuilt by Enzed before, they replaced all the rubber and I got new o-rings to suit.

I rebuilt my unit, it stopped the leak and it's holding up well without any issues.

Very interesting sir!,I would be keen to hear from anyone running the Bosch reg' to see if there is a loss of power from the lower pressure? be it a very small difference?,and yes ,the hose that blew on mine was the front hose that no-one replaces due to it's front connection, (thats what I get for having a D2-a), I've heard some owners blank off this hose,(my mechanic has done a few) ,since it's only an additional fuel bypass route, would consider that next time it goes??.

All things said,the engine is relatively simple and reliable with all major parts that stop it replaceable by Diy,(depending on your patience),and they seem to take a flogging,so I guess they had to put one part on it that keeps us busy??
Thanks for the info and I'll check out that Bosch part

Cheers Gregg

Interesting Indeed

The Bosch one is for petrol engined cars,
How would the diaphragm & plastic bits go with diesel ??

see the listing here Bosch 0280160575 Fuel Pressure Regulator | eBay

I dont think .2bar would make much diff as I didn't suffer lack of power even with fuel leaking out, as I found out when my NEW aftermarket regulator started leaking badly driving up the Hume towing my caravan & still needing to back off when EGT's were hitting 730 going uphill.

I love the barb idea, The stupid hole on the LR part is what causes the Starter motor & Crank Sensor to fail, I was happy at least that fuel was dripping out the hose onto the road, I could have put a bottle there & poured it back into the fuel tank.

Also of Interest, 3.5 bar Holden / Ford Territory regulator if your stuck could be a damn site easier to find than a LR Regulator,
http://www.ebay.com.au/itm/GENUINE-B...#ht_1580wt_810

when you look its suprising how many cars have these regulators.






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Originally Posted by goingbush

when you look its suprising how many cars have these regulators.

Because Bosch manufacturer most vehicles fuel pressure regulators so they have standardised there sizes and fitting somewhat.

Originally Posted by goingbush

The Bosch one is for petrol engined cars,
How would the diaphragm & plastic bits go with diesel ??

see the listing here Bosch 0280160575 Fuel Pressure Regulator | eBay

I dont think .2bar would make much diff as I didn't suffer lack of power even with fuel leaking out, as I found out when my NEW aftermarket regulator started leaking badly driving up the Hume towing my caravan & still needing to back off when EGT's were hitting 730 going uphill.

I am currently in discussion with the seller of eBay Australia: Buy new & used fashion, electronics & home d as to what pressure and type of regulator they are including in their rebuild kit.


Does anyone have an old FPR around that they can remove the regulator from and see if there are any part numbers or details on it?