motorad from rockauto is doing me good so far
Hard to say if it’s directly OE to Subaru, but I use Aisin thermostats and water pumps on every Subaru engine I do, they function the exact same and are equally as reliable as the original equipment, not to mention these thermostats are $15 on amazon compared to $40 from Subaru.
MOTORAD 7416203 with 203 temp is good.
The SNN-2000-195 model is good and I have zero complaints about it. I've used them for awhile now.
All I could get on short notice was a motorad...been in there over a year now and haven't had an issue. It's an OE 195 temp and seems to open around 205-210.
New thermostat (Aisin brand), fresh oil, fresh coolant, replaced at that time. Coolant system bled well. No leaks. Heat worked flawlessly. AC worked after the swap. Overheated the drive home after that swap, turns out the radiator fan module got fried on the final drive (it was above 250 on coolant temps before replacing the engine, on a 30 minute, fast, highway drive). Ordered a new one. Everything working perfect now at the right temperature points. Engine times reading perfect too (watching live data). On a 30 minute highway drive tonight, returning home after the same drive 2 days ago with zero issues, it overheats again. Radiator fans are working. The one thing I changed during the drive was turning down the heat from HIGH to 75. No more than 10 minutes later I hear the bubbling in the heater core area. Take my exit from the highway, and the red temp light starts flashing, temps read 239, and the bubbling worsened. Temps stayed above 228 until I made it home from my exit. Worse at red lights. Turned off for 10 minutes, turned back on, temps went up to 232 at idle, holding steady. Lower radiator hose read 102 degrees, upper hose reads 190.
If your thermostat is from Nappa and says Motorad on it. Then replace it immediately. They are junk and stick closed.
I noticed mine is a "motorad" and it's the cheapest shittiest one and it's been giving me problems.
I had the same issues, less than 4 moths, this brand doesn't work.
I did notice before I recently got safety/emission test for plate renewal, i wanted to confirm the I/M readiness had ran, that at idle, the full trims were extremely rich. I'm leaning towards the lower tstat having something to do with that. I have a 195 motorad(blah) that i had just installed before the plenum work. ECT didn't break 178 degrees on a highway cruise at 95+ degrees. That seems to be right at the threshold for the current dtc.
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