i was driving down the road today at 60kmh 2400rpm with 40psi of oil pressure

everytime i took my foot off the accelerator the oil pressure went up to 60psi, nothing had changed still in forth stil at 2400rpm just 20psi more.

then i put my foot back on the accelerator to keep me at 60km and the oil pressure goes back down to 40psi.

can anyone explain this??

cheerz matt.

Perhaps try topping it up. If the oil level gets low you will see the oil fluctuate around as revs go up and more oil is flung around the engine case and rocker cover. Anywhere except back in the sump.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

its full,

first thing i checked

naturally I suppose...

Is it an electric oil gauge by any chance??

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

no its not its a capilary gauge.

just throwing this out there, but is there a chance my oil pressure problem/having crap oil pressure could be somthing to do with my center oil pick up? maybe leaking air on the where to connects to the gearbox?

Last time I had that problem and symptoms (1968) the centre main bearing cap was broken...

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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.

oww dont tell me that, still runs fine tho..

My 2 cents worth. Worn mains bearing thrust washers. Have had the same thing happen, fortunately my son noticed the fluctuation and rang me and I got him to bring the car straight home and that is what it turned out to be.

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1964 998 Cooper , 1968 Morris 1100

what's the oil pressure at idle. check the pressure reading at different rpm with no load. Does the pressure fluctuate as you increase revs.
A couple of things you could check is the relief valve is not sticking and the condition of oil filter.
Also check fittings and line to guage from block.
Take rocker cover off and check clearances on rocker arms.
another thing to check is the guage try another just incase it is faulty. when you fit it leave the line fitting on the guage loose and bleed out all the air in the line.
If these are all Ok then time to dig inside and hope there are no nasty surprises.

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Research is the difference between speculation and investment. Anyone who copys some one else will always be second
www.minisprintgt.com

You say your oil pressure rises when you lift your foot off , what does it f\do when you push the clutch in or let it out (putting pressure on the crank and thrusts or taking it off) ?

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It is not worth not believing what people are suggesting that this problem might be. Oil pressure is very important for the running of the engine. Ignoring people's suggestions here might lead to the distruction of your motor. Investigate it a bit more before you drive it. Put a Master OIL pressure Gauge on it to check the real oil pressure. Gauge might be faulty too. Better safe than sorry. Oh ,,,.. And Good Luck.

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DID I MENTION THAT I AM THE BEST SUPPLIER FOR MINI ELECTRICAL PARTS AND REPAIRS?
"Let us remove your "SHORTS"

yes when i put my foot on the clutch at idle i loose about 5psi of oil pressure.

just then i tested it out down a back street

even with the ignition off and the engine turning at 2400 revs at 60km i flatned the accelerator and still i loose 20psi... ENGINE OFF...

what does it mean im confuzzled something to do with compression maybe???

p.s its not the gauge

I'll leave that one for someone else to work out , just a quick question though , this is the engine you describe in your sig isn't it , who did the auto to manual block conversion and how did they do it ?

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Has to be a bearing problem.

Last "Air Crash Investigation" I watched, rising engine oil pressure was caused by a fuel leak (confirmed by lowering eng. temp). They misread the signs & transferred more fuel to the faulty engine & the plane eventually ran out of fuel.

That's probably not much help to you. Your car won't fall out of the sky but some serious damage may be done to the crank.

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1967 Cooper S - new front bearings to do.
1965 Cooper S shell - Slow progress. No time or money!
1966 Deluxe- next rustoration!
Mk 2 & XJ6 Jags. Less said the better.