Prince Brainier of Meccano Posted September 9, 2020 Report Share Posted September 9, 2020 What are acceptable oil pressures when idling hot and cold and running hot and cold please? Link to comment Share on other sites More sharing options...
clive Posted September 9, 2020 Report Share Posted September 9, 2020 Pretty sure the only figures are for hot running (I assume 2000+rpm?) and are 40-60psi. But don't get too hung up on oil pressure. Gauges are often inaccurate (so to be reliable you need to check a few ) and as long as the oil quality is good, and the oil light isn't permanently on when idling, the pressure should be adequate. FWIW I have had well over 80psi indicated when cold, but really high oil pressure when hot is not helpful. Link to comment Share on other sites More sharing options...
Nigel Clark Posted September 9, 2020 Report Share Posted September 9, 2020 11 minutes ago, clive said: Pretty sure the only figures are for hot running (I assume 2000+rpm?) and are 40-60psi. Exactly. My Spitfire and GT6 fit this specification. My TR6 is always higher but in 15 years ownership, there have been no bad consequences. Inaccurate gauge perhaps? Nigel Link to comment Share on other sites More sharing options...
Pete Lewis Posted September 10, 2020 Report Share Posted September 10, 2020 there are no specification for idle pressures just what Clive posted one can assume the low pressure switch set at 6 -8lb" is the lower limit minimum. my 2000 runs at 80 cold 60 running hot gauges ..........are just a worry accessory most only look at them when something noisy alerts them i have a citroen cactus 130 and it has a digi speedo and fuel gauge only ...dosnt take long to find you dont miss all the others and just drive with a smile pete Link to comment Share on other sites More sharing options...
Guest Posted September 10, 2020 Report Share Posted September 10, 2020 For what is is worth, My Mk2 idles at hot at about 20psi using a mineral 20W/50 oil. Link to comment Share on other sites More sharing options...
dougbgt6 Posted September 10, 2020 Report Share Posted September 10, 2020 My GT6 runs at 80 cold and 50 hot, but as Pete says gauges aren't accurate, their purpose is to show you if it's the same as yesterday. In my view the more gauges whizzing about the better, my favourite is the vacuum gauge, hypnotic, difficult to keep eyes on the road. Doug Link to comment Share on other sites More sharing options...
Prince Brainier of Meccano Posted September 10, 2020 Author Report Share Posted September 10, 2020 Thanks. Classiclife. Re assured now. Link to comment Share on other sites More sharing options...
Prince Brainier of Meccano Posted September 10, 2020 Author Report Share Posted September 10, 2020 I have had the oil light come on a few times in the distant past, and having dipped the 710! there was oil. It has always been a tired pressure switch. Link to comment Share on other sites More sharing options...
NonMember Posted September 10, 2020 Report Share Posted September 10, 2020 4 minutes ago, Prince Brainier of Meccano said: It has always been a tired pressure switch. My first car, a Mk1 Vitesse, had a few incidents of the oil light coming on, so I went to the trouble of replacing the big end bearings... to no avail. Then somebody suggested I check the switch or fit a gauge. Guess what I found... Link to comment Share on other sites More sharing options...
Badwolf Posted September 10, 2020 Report Share Posted September 10, 2020 I replaced the oil pressure sensor and the pressure relief valve when I had this problem. I also put some decent oil in. It appears to be OK for the moment. Link to comment Share on other sites More sharing options...
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