mikey4410 Posted October 24, 2013 Posted October 24, 2013 i have a starlet turbo sportif just fitted a oil pressure gauge and would like to get an idea of what its meant to be out of interest ? cant find anywere what the pressure should be which i am puzzled about what should it be cold idle,warm idle,warm at say 3k revs etc ?? is this a big secret or have i missed something Quote
mikey4410 Posted October 24, 2013 Author Posted October 24, 2013 after ages of searching i have found the answer TOYOTA MANUAL recommends no lower than 7 psi at warm idle but a few people have idle pressures of around 15-20 psi upwards and in most cases 25-30 at idle is thought of as very good as for revs TOYOTA MANUAL says 3000 rpm should show 38-52 psi. somebody said theres is 56 psi at 5000 rpm so there u go guys............. Quote
jayc-glanza17 Posted October 24, 2013 Posted October 24, 2013 5bar cold idle2bar warm idle. is pretty much bang on for a healthy engine and pump Quote
DevonGT Posted October 24, 2013 Posted October 24, 2013 5bar cold idle 2bar warm idle. is pretty much bang on for a healthy engine and pump Pretty much what mine reads. Quote
redz11 Posted October 24, 2013 Posted October 24, 2013 5bar cold idle 2bar warm idle. is pretty much bang on for a healthy engine and pump same here mine reads exactly 2bar on warm idle at 900rpm, i've seen some running 1.8 bar on warm, not sure if its early signs of problems? Quote
AdamB Posted October 24, 2013 Posted October 24, 2013 As above, its roughly 1 bar for every 1000rpm. Toyota manual is living life on the edge. Quote
JayJ Posted October 25, 2013 Posted October 25, 2013 I have replaced a stock pressure switch with Depo oil pressure gauge and it shows following values:cold idle 5.5-5.9barhot idle(900rpm) 1.3-1.6bar1000rpm(hot) 1.8-2bar3000rpm(hot) 4.3bar Using Mobil1 super3000 5w-30/5w-40 fully synthetic mix Quote
craigyboi Posted July 18, 2017 Posted July 18, 2017 Think I may have a problem. So it started with the oil light flickering I changed the oil pressure switch and that stopped the light from coming on but a freind suggested installing an oil pressure gauge so I've done that. Now I'm not seeing any change from cold to warm it's just sitting at just above 1 bar unless I rev the engine it goes up as the rpm goes up. So it seem right with what Adam has said 1 bar for every 1000 rpm but I'm not getting 5 bar on a cold idle Any input on this would be much appreciated as I'm at a lost end googling it Quote
craigyboi Posted July 26, 2017 Posted July 26, 2017 Anyone ? Had an oil leak coming from the sandwich plate so fixed it and topped back up with oil still only reaching 1.4bar dropping down to 1 bar. Is this safe to run or is there still a problem somwhere ? Quote
TimD Posted July 27, 2017 Posted July 27, 2017 Have you tried another pressure sensor or gauge? Can you trust the gauge reading? If so, you have a problem, and I'd be worried about running the car for any length of time as is. Quote
craigyboi Posted July 27, 2017 Posted July 27, 2017 I could buy another gauge but its brand new how wrong could it be ? Ive took the car off the road for now as I don't want to damage it but I can't find the problem. Is there something inside the sump ? I've heard people talk about it but I don't know what's its called. It something the could possibly stick open or shut Quote
patman Posted July 27, 2017 Posted July 27, 2017 It's called the oil pressure relief valve, people tend to put a 1mm washer in and it gives a higher reading, what gauge have you got in at the moment? 1 bar is 14 psi, believe this or not toyota recommend no lower then 7 psi, which is abit low if you ask me, on first start up when cold is it only going to 1.4 bar? If you got one of them dodgy eBay cheap gauges in, that would be a good start to change that. Quote
craigyboi Posted July 28, 2017 Posted July 28, 2017 Yeah it's just a shitty ebay one. Yeah first start up it's only reaching 1.4bar. Think I'll order a new gauge to start with then if that doesn't change I'll go for the pressure relief valve. So really it's not sitting too low going on what they recommend? Just don't want to drive it till I'm sure Cheers that's been a big help Quote
Ollieh17 Posted July 28, 2017 Posted July 28, 2017 There must be a reasoning for the low oil pressure if not the gauge,pressure relief valve mod is really just masking the issue Quote
craigyboi Posted July 28, 2017 Posted July 28, 2017 Possibly just needing a new pressure relief valve? Not the mod. I'll start with a new gauge. Quote
Ollieh17 Posted July 28, 2017 Posted July 28, 2017 Probably more likely to be bottom end bearings on way out. Quote
AdamB Posted July 28, 2017 Posted July 28, 2017 What grade of oil is in the car? Try a different gauge and see what happens. Quote
craigyboi Posted July 29, 2017 Posted July 29, 2017 I'm sure it's 5-40 fully synthetic Just ordered an oil pressure testing kit that should give a more accurate reading. Could it be something as bad as that ? It's had a full rebuild and is fully forged.Don't know exactly how long ago mind you Quote
AdamB Posted July 29, 2017 Posted July 29, 2017 Always get reputable branded gear mate, saves you in the long run. Who built the motor do you know? I guess you got it 2nd hand. Quote
Ollieh17 Posted July 29, 2017 Posted July 29, 2017 Being fully forged doesn't make the engine invincible.especially not the bearings Quote
craigyboi Posted July 30, 2017 Posted July 30, 2017 Yeah got it from a guy on here. Car was running spot on when I got it . Most the work was done buy tuning developments Quote
craigyboi Posted August 2, 2017 Posted August 2, 2017 So just put the oil pressure testing kit on to see if it was the gauge that's knackerd. It's went from bad to worse. Started the car and it shot up to 1.5 bar I let the car sit until it was warm and the gauge just dropped slowly to 0 Almost time to take it into a garage Quote
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