jamesmartin
Well-Known Member
on a defender i would try but disco i allways fit genuine new too hard to get at
The problem with the fuel pressure regulators is that they are all made badly made. The design is ok(ish), but the manufacturing is the problem.
When the units are assembled, the O-rings tend to get damaged when they are pushed into position, so you will find some may leak from new. Others may leak in a weeks time, or a months time. Depends on the luck of the draw.
To do the repair correctly, the internal metal needs chamfering where the small O-rings seat, otherwise they will be damaged again when the new O-rings are re-seated.
Also, the O-rings are not made from a suitable material. The standard compound will break up eventually. They need to be a specific fuel type, and I doubt the eBay ones are nothing more than a standard £2 set of O-rings.
I only know this because an engineer working close to me has taken one apart to see why his leaked so soon after renewal. He is going to re-manufacture them correctly, including the chamfering, but he can only do this in batches which will be a problem for most people.
When the units are assembled, the O-rings tend to get damaged when they are pushed into position, so you will find some may leak from new. Others may leak in a weeks time, or a months time. Depends on the luck of the draw.
To do the repair correctly, the internal metal needs chamfering where the small O-rings seat, otherwise they will be damaged again when the new O-rings are re-seated.
Also, the O-rings are not made from a suitable material. The standard compound will break up eventually. They need to be a specific fuel type, and I doubt the eBay ones are nothing more than a standard £2 set of O-rings.
I only know this because an engineer working close to me has taken one apart to see why his leaked so soon after renewal. He is going to re-manufacture them correctly, including the chamfering, but he can only do this in batches which will be a problem for most people.
Shifty1962
Well-Known Member
If he can cure the problem then he'll have a constant supply of people asking for their FPRs to be reworked. I've got at least three dud ones (not all mine) sitting in my shed so I may have a go at taking one apart myself.
He asked if we could fit one of the rebuilt first batch to his Discovery commercial, so I expect that to be done sometime this coming week. Then I need to check the fuel pressures on a run, just to make sure he hasn't 'overfixed' the issue for Land Rover...
Keep in contact and send me one of them to be rebuilt if it all works out.
Keep in contact and send me one of them to be rebuilt if it all works out.
Just to update, all the rebuilt units appear to be running well. On the gauge, they run at 4.1 bar right through the rev range. I've run out of units though... :doh:
Thanks for the info on the chamfering issue, I've updated my listings with advice on that
Have you tried a repair kit?
chrisnaide
New Member
got a new fPR for chris,s disco, when i took the bolts out of the old one the threads came out of the head.
this head is only 2 years old , now iv,e got to mess about rethreading it.
WE ARE NOT AMUSED:mad2:.
gunna be off the road for at least 2 weeks till i get time to do it.
CHRIS IS DEFINATLY NO AMUSED:mad2::flame2:
this head is only 2 years old , now iv,e got to mess about rethreading it.
WE ARE NOT AMUSED:mad2:.
gunna be off the road for at least 2 weeks till i get time to do it.
CHRIS IS DEFINATLY NO AMUSED:mad2::flame2:
