hi folks, my regulator was leaking fuel everywhere so i came on here for advise, seal kit from ebay was the answer, so it arrives and i fit it. its still dam leaking!!!!!!!!! its coming out the end where i put the new rubbers, its all fitted correctly, so has anybody got any sugestions? has anyone had the same problem when fitting these rubbers??:doh::doh::doh::doh::doh:

You are not the first, happened to others too.... i've refurbished one once with other kind of o-rings and it worked for a while ... it seems that the only total fix is to get a new genuine one.

Rebuilt mine last week with the kit, huess what its still leaking, although not as bad!!! gggrrrr!!

Chaps...

The fuel pressure regulator (actual insert) can fail in a number of different ways. Below is a schematic of a generic Bosch fuel pressure regulator insert:




Possible failure mechanisms:

1- Leaky outer o-ring (diesel leaks out, effect on engine running depends on extent of leak)
2- Leaky inner o-ring (diesel bypasses regulator valve, fuel rail pressure drops, engine performance suffers)
3- Leaky diaphragm (diesel leaks through the back of the regulator)
4- 'Tired' spring or washed out valve seat (pressure not maintained, injectors under fueled, engine performance suffers)

As you can see replacing the o-rings will only fix 1) and 2), the other scenarios call for replacing the complete insert or even the whole fuel pressure regulator block.

If the inner workings on the fuel pressure regulator are stuffed, the part can be replaced with a Bosch p/n 0.280.160.575 FPR (used in several Audi & VW models over the last 12 yrs).



None currently sold on eBlag UK but at least one across the Atlantic:
http://www.ebay.co.uk/itm/Bosch-Fuel-Pressure-Regulator-Audi-A4-A6-A8-90-100-VW-/290572937146?pt=Motors_Car_Truck_Parts_Accessories&hash=item43a77f27ba

Bottom line is replacing the o-rings is likely to solve your problems but may well not.

Rgds
Matt

The latest regulator for the early TD5 (dont know about the later ones) has a modified block and gasket. LR must have recognised a problem.

Do not buy a sh"" part one my mate did fitted it and a week later it leaked. paid £7.50 more from landrover for a new one & its been fine.
And believe it or not got his money back off britpart !!!