Making me sad and angry, oil is good at start 60psi hot, 30-35psi idle after the engine is well warm hot is 40psi, idle drops to 10-15psi...

Going to change to valvoline classic this arvo, any other suggestions to keep oil pressure up?

_________________
Here am I sitting in my tin can far above the Moon
Planet Earth is blue and there's nothing I can do...



“A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.” - Jeremy Clarkson

Is it suddenly like this.

If u still have the original oil press relief valve check it is not jammed part open.

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68 Morris Cooper S Mk1 (*ex 78 1275 LS 4th last built, 70 Morris 1500 OHC & 70 MiniMatic)

Dropped oil, diesel flushed, refilled with Valvoline classic.

Went for a 20min drive, idle is 45psi hot is 75psi... see how long it lasts...

Definitely won't be using gw oil again

_________________
Here am I sitting in my tin can far above the Moon
Planet Earth is blue and there's nothing I can do...



“A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.” - Jeremy Clarkson

GW oil is recycled sump oilz mate. Ask Morris 1100...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Shhhhhhh. That was under their previous identity (same owners though)

Is the diesel flush causing the issues, are you getting it all out? I cannot say I have ever done this?

One of my Mini's had low oil pressure and when changing the oil it would come out very thin.

Turns out the seal in the mechanical fuel pump had failed and fuel was getting in the oil and contaminating it. New seals in pump, new oil and good oil pressure was back.

Unlikely this is your problem but thought I would throw it out here just in case.

Pete

ever seen what main bearings look like after they've been run in petrol contaminated oil? nasty...

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did I tell you that I won a trophy?

Ok,

its been a week, the valvoline is a great oil, pressure is up at start around the 60pounds at idle, drove around yesterday for a while, stop start traffic etc and the pressure began to drop again... had to keep feathering the accelerator to stop it from going below 15-20pounds...

Doc, i think it may still have the original relief valve... do you mind if i come around this week or next and you can show me how to do your modification?

_________________
Here am I sitting in my tin can far above the Moon
Planet Earth is blue and there's nothing I can do...



“A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.” - Jeremy Clarkson

Sure, drop in and I'll help you sort it out..
I have a new 9/16" steel ball you can have.

It could also be that a ball has been fitted with no steel rod inside the spring, the spring can then bend around a bit and flick the ball partly off the seat.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

cool, ill drive out tomorrow if that suits?

_________________
Here am I sitting in my tin can far above the Moon
Planet Earth is blue and there's nothing I can do...



“A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.” - Jeremy Clarkson

PM sent.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.