I have a 1980 Triumph TR8 that uses the same
Rover 3.5 engine. My engine idles (850-900 rpm) at about 18 -20 psi hot,
and runs at 35 to 45 psi hot, depending on rpm. The shop manual engine specs
state oil pressure as 28 psi at 2000 rpm hot.
It is easy to alter the oil pressure on these
engines by shimming the bypass spring pressure on the oil pump,
provided the journal clearances are within spec. This is done by
adding a small washer on top[ of the spring. I shimmed my bypass
spring to overcome centrifugal forces because I use a higher
redline.
This engine is based on the '61 to '63 Buick, and
as such, runs reletively low factory oil pressure.
-Donny
----- Original Message -----From: Dave PennySent: Friday, April 22, 2011 10:09 AMSubject: [MarcosManiacs] Oil pressure;
Can anybody let me know the oil pressure for an 86 mantula, 3;5 liter rover engine.Idle pressure and running pressurethanks