Oil temp out of control
well let me make the long story short, im having problems keeping oil temps under control, and not to say that I did not try working it out, except that im out of ideas!!
Well oil temps seems to be skyrocketing, which cause me another problem given the oil temp tends to PULL the water temps up with it no matter how good my radiator/fan/water cooling system is.
Scenario: Cold start, water temp rises to the 180degree range and stay there for the next 20minutes, until the oil temps start to come up to and past that point, when oil temps reach about 220 and coolant temps also rise a few degrees above that of oil which is crazy high if you ask me.
I had the stock oil cooler and the car did the same, so I didnt worry, switched to a big *** (no dimensions currently) HKS engine oil cooler, same problem, so I figured it was the fact that the cooler was getting no ambient airflow. Finally switched to using two oil coolers instead of the fog-lamps for best air-flow, well guess what, yes it takes the oil a little longer to heat, but nothing stops it from reaching where it does >.< Even high-way cruising showed that oil temps were increasing "slowly" - nothing seems to be able to lower the temps not even babying the car.
Turbos are oil lubricated AND cooled, however while the oil is passing through the turbos and being heated up, its worth mentioning that those turbo feed oil restrictors are 0.9mm, im wondering how much they could flow and how fast they could heat up the oil temp.
Oil used: regular (temp) non-synth 20w-50
Dual oil coolers in following arrangement: engine >> cooler1 >> cooler2 >> back
Oil coolers have dash 10 fittings each.
All suggestions are welcome.
well let me make the long story short, im having problems keeping oil temps under control, and not to say that I did not try working it out, except that im out of ideas!!
Well oil temps seems to be skyrocketing, which cause me another problem given the oil temp tends to PULL the water temps up with it no matter how good my radiator/fan/water cooling system is.
Scenario: Cold start, water temp rises to the 180degree range and stay there for the next 20minutes, until the oil temps start to come up to and past that point, when oil temps reach about 220 and coolant temps also rise a few degrees above that of oil which is crazy high if you ask me.
I had the stock oil cooler and the car did the same, so I didnt worry, switched to a big *** (no dimensions currently) HKS engine oil cooler, same problem, so I figured it was the fact that the cooler was getting no ambient airflow. Finally switched to using two oil coolers instead of the fog-lamps for best air-flow, well guess what, yes it takes the oil a little longer to heat, but nothing stops it from reaching where it does >.< Even high-way cruising showed that oil temps were increasing "slowly" - nothing seems to be able to lower the temps not even babying the car.
Turbos are oil lubricated AND cooled, however while the oil is passing through the turbos and being heated up, its worth mentioning that those turbo feed oil restrictors are 0.9mm, im wondering how much they could flow and how fast they could heat up the oil temp.
Oil used: regular (temp) non-synth 20w-50
Dual oil coolers in following arrangement: engine >> cooler1 >> cooler2 >> back
Oil coolers have dash 10 fittings each.
All suggestions are welcome.
thanks for the reply, I dont know how i forgot to mention this.
The ambient temps when i did this was exactly 95, not to mention the temps get up to and BEYOND 113 in the morning, not to mention humidity was kinda bad, but I was always under the impression that humidity works in favor of heat exchangers.
No fans on the coolers, and it does seem like the oil coolers vanes (whatever they are called) are spaced too close to each other, im assuming the air might be travelling "around" the cooler, but thats just a quick guess.
and as far as i know, there is no smoke once temps go up.
Now my oil temps are a different story. Just cruising around during the hottest part of the day(90F plus) they hover between 235F and 248F. I actually get intermittent exhaust smoke once the oil temps get over 225F. When time permits I plan to add a pretty good size oil cooler and going with SPAL fans on the radiator. As for your fix I have no clue. I have been to Dubai and as you know the ambient temps get up there and just standing on the street you feel like you are in an oven. Where I am in Florida we have horrible humidity along with high temps. Good luck on solving your issue. I wish I had a resolution for you.
Now my oil temps are a different story. Just cruising around during the hottest part of the day(90F plus) they hover between 235F and 248F. I actually get intermittent exhaust smoke once the oil temps get over 225F. When time permits I plan to add a pretty good size oil cooler and going with SPAL fans on the radiator. As for your fix I have no clue. I have been to Dubai and as you know the ambient temps get up there and just standing on the street you feel like you are in an oven. Where I am in Florida we have horrible humidity along with high temps. Good luck on solving your issue. I wish I had a resolution for you.
wow, your oil temps are skyrocketing man, but again this is with no oil cooler, so thats impressive. I wonder how dangerous it is to be running with that high of an oil temp, now even if i switch to a really high viscosity oil, something like Castrol 10w-60, problem is when oil temps go up they cant help but pull the water temps up as well, I got a dewitts rad + dual spal fans on the radiator and a 160degree thermostat. Water temps go up, timing goes down, I Guess ill have to tune the car on the dyno with high water temps and go from there, because the current calibration pulls from 2 to 6 degrees of timing and as a result drivability gets f'ed (2.5bar SD tune)
I dont know if having fans on the oil coolers would help though.
FYI, if your max oil temp is 220 you have nothing to worry about.You want it to reach a nominal temp of 210 - 215 to eliminate condensation in the system. I routinely see 280 degree oil temps during open track events and have confirmed through used oil analysis this is not an issue. This is using Pennzoil Platinum 10w-30 or RLI BioSyn 10w-30 SHP HD.
FYI, if your max oil temp is 220 you have nothing to worry about.You want it to reach a nominal temp of 210 - 215 to eliminate condensation in the system. I routinely see 280 degree oil temps during open track events and have confirmed through used oil analysis this is not an issue. This is using Pennzoil Platinum 10w-30 or RLI BioSyn 10w-30 SHP HD.
water temps stay fine as long as oil temps are down, when oil temps increase so does the coolant, coolant seems to be maintained at a few degrees above oil temp at all times.
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water temps stay fine as long as oil temps are down, when oil temps increase so does the coolant, coolant seems to be maintained at a few degrees above oil temp at all times.
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Thing is, the car is tuned on the dyno under 100 degrees Celcius (water temp) where it pulls no timing, since im driving above that, the car seems to be pulling lots of timing throughout the rpm range not just at WOT, and messes with the AFR not to mention the jerkiness.
Seems ill have to tune the car at and above 100degrees celcius (water temp)
Thing is, the car is tuned on the dyno under 100 degrees Celcius (water temp) where it pulls no timing, since im driving above that, the car seems to be pulling lots of timing throughout the rpm range not just at WOT, and messes with the AFR not to mention the jerkiness.
Seems ill have to tune the car at and above 100degrees celcius (water temp)
The new oils can be run at 290 temp if need be. but the bearing will start to have issues around 300 i think.
I will try it however, does this sound good?
Mobil1 0w-40 super synth oil. I also got some oil additive thats supposed to drop oil temps, ill get the name when i pass by the garage tomorow.
Keep the suggestions coming =)
im also gonna add some sheetmetal on all sides of the coolers just to make sure the air flows through the coolers not around them
Yesterday I switched from 20w-50 to Amsoil 5w-30 and my oil temps dropped 15 degree's. I got on it some and it recovered back down faster. I might try 0w-30 or 40 and see if the temps drop further.



