Factory oil cooler t-stat
01-30-15, 04:29 AM
#4
Pit Crew
Thread Starter
This is the RC F oem sandwich thermostat adapter for an oil cooler. It retails for $192. The remainder of the oil cooler parts, if they would fit, are quite expensive. An after market cooler and lines will likely be better suited. The center hollow bolt to hold this all together is not available separately, so that will need to be sourced.
First pic, sandwich bolted to the stock bracket. Second, sandwich from behind. Third is the thermostat.
First pic, sandwich bolted to the stock bracket. Second, sandwich from behind. Third is the thermostat.
01-30-15, 09:58 AM
#6
Tech Info Resource
iTrader: (2)
So do we need PNC 15660 to attach to our existing unit, or do we need the whole ball of wax?
Would also want to fab some AN to o-ring adapters for the OEM hose mounts on the housing. Nice they integrated the thermovalve too.
Would also want to fab some AN to o-ring adapters for the OEM hose mounts on the housing. Nice they integrated the thermovalve too.
01-30-15, 02:45 PM
#7
Pit Crew
Thread Starter
You only need the 15660-38010, and a longer center hollow bolt. There's plenty of meat to tap into for fittings. I'll remove the valve and test it for opening temperature.
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02-01-15, 05:13 PM
#8
Pit Crew
Thread Starter
The thermostat did not even crack in boiling water, so I'll have to go further to find the opening temperature.
The bores where the factory lines insert measure 20.32 mm. Almost perfect to tap it for an M22x1.5 o-ring fitting, which is a very common hydraulic fitting size in the world of oil coolers.
The bores where the factory lines insert measure 20.32 mm. Almost perfect to tap it for an M22x1.5 o-ring fitting, which is a very common hydraulic fitting size in the world of oil coolers.
02-01-15, 05:34 PM
#9
Tech Info Resource
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So the Lexus adapter, 4 M22-RU ends, some fibre braided hose, and a ~150 square inches of Setrab cooler and were doing some real magic? Only question now is where to mount.
02-02-15, 01:51 PM
#11
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Sewell does not list this part, but I did find it at another online retailer for ~$139. Not a bad price at all for something OEM design, fit, and finish. Now the center bolt...I am wondering if the center bolt might be the same and they just made the oil/water cooler a few mm thinner to compensate...
The parts breakdown for the IS-F does not show the o-ring between the oil cooler and the factory oil filter mount where the RC-F definitely does show this. Now I am even more curious about this, and certainly after the oil temps I saw on the track, I want to pursue this.
That being said, my wear numbers from UOA don't show anything to indicate there has been a wear issue associated with the high oil temps at the track. My track events did not impact my OCI, and my wear numbers are very consistent over time, despite Mobil 1 changing their formula.
The parts breakdown for the IS-F does not show the o-ring between the oil cooler and the factory oil filter mount where the RC-F definitely does show this. Now I am even more curious about this, and certainly after the oil temps I saw on the track, I want to pursue this.
That being said, my wear numbers from UOA don't show anything to indicate there has been a wear issue associated with the high oil temps at the track. My track events did not impact my OCI, and my wear numbers are very consistent over time, despite Mobil 1 changing their formula.
Last edited by lobuxracer; 02-02-15 at 02:43 PM.
02-03-15, 03:23 AM
#13
Pit Crew
Thread Starter
How long were you running at the higher temperatures?
Yes, the fiche doesn't show either o-ring/seal for the liquid cooler on the IS F. A bit moot though, as Toyota charges close to four figures for either of the liquid coolers w/ the bolt.
The thermostat is a little weird. Oil pressure is used to "pop" the valve/spring open when temperatures are cooler, allowing bypass of the cooler. As temperature increases, the t-stat extends outward, compressing the spring, forcing the valve to remain closed, and thus no bypass of the liquid to air cooler. The t-stat does not force the valve closed until over 230 F.
Yes, the fiche doesn't show either o-ring/seal for the liquid cooler on the IS F. A bit moot though, as Toyota charges close to four figures for either of the liquid coolers w/ the bolt.
The thermostat is a little weird. Oil pressure is used to "pop" the valve/spring open when temperatures are cooler, allowing bypass of the cooler. As temperature increases, the t-stat extends outward, compressing the spring, forcing the valve to remain closed, and thus no bypass of the liquid to air cooler. The t-stat does not force the valve closed until over 230 F.
02-03-15, 08:41 AM
#14
Tech Info Resource
iTrader: (2)
14 sessions of 20 minutes each on one of the samples. Probably the last 15 minutes of each session at one bar from the top of the gauge. OAT was 102F at the peak of the day.
So the thermovalve element works something like the inverse of a coolant thermostat? Allows flow until the set temperature, then closes off? Does there appear to be any way to change the operating characteristics, or it is a melting wax setup like a coolant thermostat?
So the thermovalve element works something like the inverse of a coolant thermostat? Allows flow until the set temperature, then closes off? Does there appear to be any way to change the operating characteristics, or it is a melting wax setup like a coolant thermostat?