Just got hold of and fitted a 90 spec rst motor into my S1 after melting a piston on the old one.

The engine has done about 4-5000 miles since a full rebuild (stage 3 head, low comp forged pistions etc etc) but has been sat out of a car for a while.

Just got the swap finished this evening but after cranking it over oil pressure light stays on. Taken the oil feed hose off of the turbo to see if anything is coming out, but nothing.
Just done and oil and filter change and the oil is Mobil1 15W50 Fully synthetic.

Have checked there are no leaks anywhere, all hoses connected in the right places etc. The only thing i can think of is the oil pickup or oil pump out working.

Does this sound right? Or any other ideas?

 

did u use the same oil pump wen u rebuilt it? not sure if it wud melt a piston as this might b the reason if its faulty, not sure tho

 

Nah sorry, just to clarify its a different engine then one with the melted piston.

 

I dont' know but... could pop onto www.seriesoneturbo.co.uk really good site for all MK3 escorts and a helpful bunch so will most likely get your answer pretty quick mate.

 

Ok thanks, i'll give it a go!

 

my zvh engine took an age to get the oil pressure up after i built it, i had to do several runs cranking over on the starter before the pressure got up.
no problems since then though.

 

could be the pressure release valve in the pump is sticking

 

As I told you on the other thread: Oil cooler is always worth a check (that sandwich plate between oil filter and block).

 

Problem solved, manually primed the oil pump and hey presto! Silly me!