hello all, just wandering when i start my car up to go for a drive its sits at about 50 psi but after a while of driving like if i go for an hours drive or something the pressure goes down until the needle sits on 0. i continue to drive my car and it hasnt seized the block so i figure i must have oil pressure? im not sure. it has plenty of oil in motor as well. what do you guys think?

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

when was the last time you gave it a Oil change and Filter

Does she blow and blue smoke out the exhaust

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Stop Licking the Dog...I Don't Care Who Started It

no smoke from what i can see i dont know when im driving if it blows smoke though doesnt seem to be so family have told me when i drive off. oil is fairly new but will change it in the next few weeks.

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

See if you can borrow another oil pressure guage and try it to confirm whether the problem is the oil pressure or the guage .

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ok ill see what i can do and let yas know.

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

check to see if the Oil is dirty or still clean but yes I would also check the Oil Pressure Gauge aslo.
Does the motor run hot

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Stop Licking the Dog...I Don't Care Who Started It

yes motor runs hot.......which i also cant seem to work out why. i have a fresh air heater a normal radiator and a radiator out of a heater mounted in engine bay also and she still runs warm

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

One of my engines i rebuilt had a stuck oil pressure releif valve. No good for pressure. If you take out the releif valve and put an inner cv ball in under the spring it will raise the pressure.

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Dean Hutton's first car was a Mini.

ok i dont know where that is or how to do would you be able to explain in detail in a pm or something??? if its not too much trouble?

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

Plenty of info on here if you search,

e.g. http://118.127.11.148/~ausmini/forums/viewtopic.php?t=46507&highlight=oil+pressure+relief+ball

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Too many cars, and too little time.

Remove the oil releif valve - big domed nut front left (drivers side) inside wille a spring and a bullet shaped cone - may need a 10mm dyna bolt to screw into it to pull it out.

get a 9/16" steel ball to replace the cone. cut 4mm off the spring put 40mm of 5/16" rod down the centre of the spring and put it all back and screw on the cap

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David L


My greatest fear in life is that when I die my wife will sell my Mini and tools for the price I told her I paid for them!

Whats the purpose of the rod?
I never put anything there when i did mine and its all good.
Is it just to keep the spring straight?

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Dean Hutton's first car was a Mini.

From memory it's to stop the spring or ball compressing too far and getting snagged on something . It's possible but not highly likely , more of an insurance thing .

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Thats it - the Doc says there is a the potental for the spring to jamb off centre so the rod keeps it centered and stops jambing

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David L


My greatest fear in life is that when I die my wife will sell my Mini and tools for the price I told her I paid for them!

you know something wierd... since I did that to my motor, my oil pressure at idle is higher than my oil pressure under load.

it idles at 75psi, and is at about 60psi the rest of the time - 100k's on the freeway, putting around at 60 4th, fanging away from the lights...

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did I tell you that I won a trophy?