Hi,

Quick question - I have just replaced the cylinder head on my 2.0 DTi Vectra (Y20DTH)

This is the first time I have ever attempted any work on an engine, so nothing like a baptism of dervvy fire!

The car starts and runs but is very rough - metallic sounding rattle and oil pressure warning light comes on. A friend suggested perhaps I'd forgotten to fit an 'oil pressure regulator valve' meaning either too much or not enough oil is making it to the head and flooding / starving the hydraulic tappets which would explain the low oil pressure warning and noisy top end.

Have searched Google and Haynes Manual and no mention of such a valve.

Anyone hazard a guess at what I've done wrong??? There was nothing wrong with oil pressure when I dismantled engine.
Cheers
Spike

PS I intend to make some notes on these forums about my experiences of changing a head when I get the car running properly and have some spare time