non return fuel valve

[jade]

Hi
non return fuel valve can anyone please tell me where it is or show me with a pic
Cheers Jade

[jade]

Hi
Please can anyone help , as i understand there is a check valve to hold fuel pressure
in fuel line , where is it ??? is it in the tank , does anyone have a pic of it .
my car is not holding fuel pressure & starts bad which i think this could be the problem
THANKS Jade

[jade]

Anyone

[twoqu]

Usually the check valve is a hexagonal fitting incorporated in the fuel pump just before the union for the pipe. I say usually as having looked at the diagram it is not listed as a spare part on the RS2 unlike other Audi models. So possibly it is intregral with the pump. Unless a Bosch dealer can supply one!

[jade]

Cheers
I couldnt find it listed will go to bosch & see what they say
Thanks

[jade]

Well i went to bosch & audi this morning & neither can tell me where the check valve is . Is it in the pump do i need to change pump or can i just buy check valve, someone must know where it is???
Cheers Jade

[twoqu]

As I said before, the check valve is located in the outlet from the pump. If you can see a copper sealing washer between the pump body and the outlet then that where it is usually. It is possible that it is not a replacement part, that's why neither Audi Or Bosch seem to list it. Assuming its the original pump, then a upgrade to the 044 pump would be worthwhile. Search the forum as this has been covered comprehensively.
In this pic you can see the checkvalve sandwiched between the pump and the union. This is an 044 pump that has an external valve. Perhaps the later pumps have an internal one that is not replaceable. Another good reason to upgrade!

[twoqu]

Check the pics out here:

http://www.s2forum.com/forum/showthread.php?t=14698

I guess the only other place it might be is in that bulky union. It looks suspiciously large!

[jade]

Thanks Its all clear now
Cheers Jade