Fuel check valve question

[ufool]

I have a hot starting 'issue' with my '77 Carrera 3.0. I've already swapped out the accumulator and unfortunately it still gets a vapour lock when I stop for say 10mins or more. I'm suspecting the 'fuel check valve'. Unfortunately everyone I've tried so far doesn't seem to be able to find this part on their PET system for my year model. The Bently manual clearly shows this part as a thing that threads into the top of the fuel pump but on the PET system my year car doesn't appear to have this. Cars from '84 onwards do however, so my question is where exactly is it? Inside the pump? (My pumps brand new) Perhaps I should just order a later year part and screw that in? What do you think? Anyone else manage to get find this part? Cheers
M

[Gilbert '71 T]

Not sure where the check valve is, but it could also be down to the Warm up Regulator (WUR) as this is in the control pressure circuit not just for warming up.

You could try cooling the WUR by way of a cool bag/cold damp cloth or something when the engine is hot, if the engine starts when the WUR is cool and the engine is hot then suspect the WUR, if not and from what you've already checked/replaced then the mysterious check valve must be the culprit, but i thought they were part of the fuel pump

Another good thing to do is check the fuel pressure, I got a pressure tester made up by Pirtek to check my system, hot & cold pressures

http://www.ddk-online.com/phpBB2/viewtopic.php?t=9674

Hope this helps & good luck