Strange O/P

[Paul T.]

On cold start on idle I have 4bar...great

When the throttle is blipped (

When Oil is warm the pressure steadies 3-4bar on normal load, but drops to 1bar or a tad less on idle. Even when warm the OP is very responsive to revs ie jumps to 4 bar when blipped.

 

I have checked the earthing and just changed the sender as the usual suspect, but similar readings.

Q.The engine has just had a rebuild and I done an initial fill with 5w/30 Semi to help bed the big-end and main bearings, would this be the cause for the high variation in OP readings.

Q.Should I switch back to fully synthetic...will it make the difference 🤔

 

Q.Should I be that alarmed with the high readings 🤔

 

Edited by - Paul T. on 1 Jun 2006 17:17:37

[Shaun_E]

SAE30 sounds a bit thin for a K series engine. I ran mine in on 10W-40 mineral oil (might even have been 10W-50) which was recommended by Dave Andrews and then changed to Mobil 1 0W-40 after 500 miles. Caterham recommend their 5W-50 motorsport oil.

With the 0W-40, my oil pressure can drop quite low at hot idle - with your 10W30 it could get even lower.

 

Yellow SL #32