Leak off test results..

[chriz1]

Have i done this correct, leak off test on my combo van 1.7 cdti run engine from cold for 2 mins rev'd at 2k for 30 secs.

The results in the picture ..

Can't find a decent guide some say you run test for 5 mins doing various revs

Sorry it's sideways!

[Disco_Biscuit]

I used to work at a diesel specialist, we used to run them at idle for 3 minutes, anything over 30ml is excessive back leakage.

[chriz1]

Ok Thanks for that

[tapkaJohnD]

I'm aware of a "leak down" test, pressurising a cylonder to check for ring or valve leaks.
What's a "Leak off" test?

John

[Novexx]

Leak off test measures the volume of fuel being returned from the injectors via the return lines - all cylinders should be within a certain limit & any injector showing excessive (or limited) return in comparison to the others indicates a potential issue.