GR Yaris Oil Cooler Pressure Drop

[MRA3]

I only went to the track with the GR Corolla heat exchanger so its difficult to compare, but I had over 135°C oil temperature even on a cold day.
On street driving I didn't notice any change.

Thank you, that´s good to know.

 

[MRA3]

Put an oil cooler in yesterday, and just like that, the oil cooler is back out... I've never had an issue with a 10-row Setrab oil cooler on 1.6 liter engines. Like a few psi pressure drop, at most. 11psi pressure drop between the thermostat being open and closed on this system. First thought is that the Toyota G16E is moving a lot of oil. Each piston has three cooling jets, and so on.


Sandwich block shows no restriction, as a pull under 92°C, with the thermostat closed and the oil bypassing shows the same pressure as stock. Then a pull at 96°C, with the thermostat open and oil switched to the external core shows a 78kPa/11psi drop. So in we go...


Some oil leakage from the banjo fittings got me interested (WTF?), and what I thought were Setrab Proline High-flow banjo fittings are some kind of Chinese garbage with 6mm holes. Four 6mm holes has the same flow area as a -10, but it's not the same flow when it has to go through four 6mm holes, and at a 90° angle...and it's squeezing through four of these fittings. I found the company that sells the fittings. Some company called Torques in the UK with a Facebook page and whose website address is just a redirect to an Ebay store. We know what that means...


And this is why I spend so much time testing shit, and don't just bolt stuff on assuming it'll be good to go. The modern go is for companies to think of a part they can sell, then make up some "problem" they "found," and blow up the problem with the car on the Internet to sell the "solution." Many times, the solution is actually a performance and reliability downgrade because they never even bother to...test...the part.


I'm a little angry, so sorry about the words. I don't even want my money back, and I'm not willing to buy the Setrab fittings to see if that fixes it because I don't want to do someone else's R&D. Does no one even test parts before selling anymore? I bought this kit because I don't want to cut the front of the car apart. Bolt-on.

So I'm going with the larger heat exchanger from the Corolla and a larger radiator.

Oil pressure log pics are self-explanatory. The fitting pics are the one I took apart from this kit vs. a real Setrab Proline version.

I wonder how many engine failures are due to the fact that they had an oil cooler installed, causing loss of oil pressure, on an engine that as stock form already runs on very low ones…

 

[Michael Knight]

I wonder how many engine failures are due to the fact that they had an oil cooler installed, causing loss of oil pressure, on an engine that as stock form already runs on very low ones…

With setrab and an10 connectors and ptfe hoses no pressure issues. Keep your oil fresh and parts quality good.

 

[Michael Knight]

did some man maths on this topic so that M22 banjo fitting with 2x10.4mm has cross sectional area of 170mm2 whereas an10 has 97mm2.
biggest limiter is the actual AN10 hose diameter, not the banjos itself. Best to use AN12 and pro banjo fittings, of course.
Estimated system flow (0w20 in 100'C, 3bar) 48ltr/min, and 60ltr/min with 120'C and 2.5bar.

An12 would have biggest difference in 100'C (+40% more flow) but in 120'C it yields little improvement as fluid viscocity is already lower.