06-11-2017, 05:10 PM
(06-11-2017, 04:17 PM)Nick Salmon Wrote:(06-11-2017, 03:57 PM)Chris KC Wrote: Sticking my neck out a bit here as I haven't driven a splash fed engine in years - but in my memory that pressure's about right for a standard A7...
The water episode will have done no lasting damage IF it was thoroughly drained at the time. If water was still in there somewhere you'd see 'mayonnaise' floating inside the rad cap.
Thanks Chris. 5-7lbs is fine for a warmed up engine but not at start up from cold. This lack of higher pressure when cold made me think maybe the pump is at fault. There's no mayo in the rad and there's no obvious grey emulsion in the oil. Only the frothing, which subsides after the engine is turned off and left for a while.
I see. Yes I note the oil looks clean. I can't comment on the froth I'm afraid, but I guess a worn pump is the obvious culprit if pressure is low. (What happens if you let it warm up?) A cautionary note about oil pressure loss - I trailered my car ignominiously back from Southampton docks once when oil pressure suddenly dropped to zero; it turned out to be a bit of red hermetite which had somehow found its way up to block the oil pressure gauge pipe. The engine was running fine!