Mg haggerston Posted August 23, 2016 Report Share Posted August 23, 2016 Sorry but this is the old tr topic oil pressure,mine is steadily dropping down 30-40 when hot 5-10 tickover. My question is do oil coolers clog up,do they last indefinitely. This is my first post so be gentle! Quote Link to post Share on other sites
Guest ntc Posted August 23, 2016 Report Share Posted August 23, 2016 Yes they do clog up , is it hot when the engine is very hot? is the oil light on at tickover? and welcome. Quote Link to post Share on other sites
Mg haggerston Posted August 23, 2016 Author Report Share Posted August 23, 2016 Yes the engine seems to run hot,not sure about cooler. Oil pressure light has come on once when stuck in traffic. Oil pump was replaced with a toleranced pump from enginuity in 2007,engine rebuilt in 1990 but only done 26,000 miles since. Quote Link to post Share on other sites
Guest ntc Posted August 23, 2016 Report Share Posted August 23, 2016 Yes the engine seems to run hot,not sure about cooler. Oil pressure light has come on once when stuck in traffic. Oil pump was replaced with a toleranced pump from enginuity in 2007,engine rebuilt in 1990 but only done 26,000 miles since. Thermostat fitted on the cooler pipes? Quote Link to post Share on other sites
Mg haggerston Posted August 24, 2016 Author Report Share Posted August 24, 2016 Took car for run this morning,oil cooler hot! There is no thermo fitted. Quote Link to post Share on other sites
Guest ntc Posted August 24, 2016 Report Share Posted August 24, 2016 Check the pressure relief valve . Quote Link to post Share on other sites
john.r.davies Posted August 24, 2016 Report Share Posted August 24, 2016 Recommend thermostat! Unless you live in a hot country, go pass storming or tow a caravan, or race, a cooler is non-essntial. Fit one, and your oil will spend most of the time too cold, when it is as poor a lubricant as too hot. Test the state of your cooler by taking it out of circuit. If oil pressure fine then cooler needs cleaning out. If not, then as above. Cleaning is like radiator flushing, except you fill it with engine cleaner fist and let I soak, then hot water from both directions until it comes out clean. Blow through with an air line at end,or hang it up to drain. John Quote Link to post Share on other sites
Mg haggerston Posted August 24, 2016 Author Report Share Posted August 24, 2016 Oil cooler seems really hot, hot as engine,will attempt to flush it. Thanks everyone for tips and help. Regards Michael. Quote Link to post Share on other sites
john.r.davies Posted August 25, 2016 Report Share Posted August 25, 2016 IT IS SUPPOSED TO BE HOT!!!!!!!!!!! How do you think it loses heat to coll the oil¿???????? John Quote Link to post Share on other sites
Andy Moltu Posted August 25, 2016 Report Share Posted August 25, 2016 At what temps does modern 20/50 oil become less effective as a lubricant (both high and low) and whether or not your engine heats the oil above that or the cooler chills it below that in normal use? Any oil experts able to answer that one? Quote Link to post Share on other sites
astontr6 Posted August 25, 2016 Report Share Posted August 25, 2016 HI Mg! Engine re-built in 1990? Have you the invoice? If yes! Invoice value? What was done etc.? Regards, Bruce. Quote Link to post Share on other sites
Mg haggerston Posted August 25, 2016 Author Report Share Posted August 25, 2016 Engine was rebuilt by Rees bros at a cost of £3500,which i think is a bit steep for 26 years ago? It also has a stage 3 head,but i don't know which cam is fitted possibly just the original 150? what does 20/50 mean is it temp or viscosity Quote Link to post Share on other sites
astontr6 Posted August 25, 2016 Report Share Posted August 25, 2016 20/50 shows its a multi-grade oil that covers the viscosity range of 20/50 to the SAE Standard for engine oil. The test is, a certain volume of oil has to pass through a hole of a given size at a given temperature. Is your invoice itemised? If so what did they do for a £3500 engine rebuild? Bruce. Quote Link to post Share on other sites
Mg haggerston Posted August 26, 2016 Author Report Share Posted August 26, 2016 some of the writing is hard to read. Michael Quote Link to post Share on other sites
Mg haggerston Posted August 26, 2016 Author Report Share Posted August 26, 2016 some of the writing is hard to read. Michael Quote Link to post Share on other sites
Guest ntc Posted August 26, 2016 Report Share Posted August 26, 2016 Is there any engine noise when the light is on or off? Quote Link to post Share on other sites
BlueTR3A-5EKT Posted August 26, 2016 Report Share Posted August 26, 2016 +1 oil PRV plus an oil and filter change. Loop out the cooler and see what happens. Peter W Quote Link to post Share on other sites
astontr6 Posted August 26, 2016 Report Share Posted August 26, 2016 Mg, What I was looking for on that invoice was: Re-bore + Pistons + Re- regrind Crank + Bearings! If there are no other invoices referring to a full engine rebuild including engine removal + new clutch etc. This may well be the cause of your problems? As it would look to me that this work was not done. How much history have you got? Is the correct mileage known? Bruce. Quote Link to post Share on other sites
peejay4A Posted August 27, 2016 Report Share Posted August 27, 2016 (edited) I had a quick read and all those items are there but no crank regrind. 20 thou rebore. No mention of a stage 3 head that I could see though. Edited August 27, 2016 by peejay4A Quote Link to post Share on other sites
Steves_TR6 Posted August 27, 2016 Report Share Posted August 27, 2016 Rees Bros are a nice bunch, you might give them a ring as although this was a long time ago they may still have records or even remember! Steve Quote Link to post Share on other sites
stuart Posted August 27, 2016 Report Share Posted August 27, 2016 I had a quick read and all those items are there but no crank regrind. 20 thou rebore. No mention of a stage 3 head that I could see though. Read it carefully and it says crack test and regrind crank £49.13. Interesting to note that a so called uprated oil pressure relief spring fitted and that the hours changed between the job sheet total and the bill total. Stuart. Quote Link to post Share on other sites
astontr6 Posted August 27, 2016 Report Share Posted August 27, 2016 Stuart, You are right I missed that! Bruce. Quote Link to post Share on other sites
peejay4A Posted August 27, 2016 Report Share Posted August 27, 2016 I should have read slower. Still no head details other than it was "machined", presumably skimmed. Quote Link to post Share on other sites
Mg haggerston Posted August 27, 2016 Author Report Share Posted August 27, 2016 Crank crack test and regrind is on the far right column,along with thrust washers and bearings. Stage 3 head was fitted in 2000 , when converted To run on unleaded,along with extractor exhaust. car runs fine with no clonks or black exhaust, will try to clean out the oil cooler and prv. will keep informed of future progress! Michael Quote Link to post Share on other sites
astontr6 Posted August 27, 2016 Report Share Posted August 27, 2016 Mg, When the car is left over-night, from the first turn of the ignition key! How long before oil light goes out? Bruce. Quote Link to post Share on other sites
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