by "BJohnson11" (brettjohnson01)
Published 06/12/2017 at 18:52
by "BJohnson11" (brettjohnson01)
Published 06/12/2017 at 18:52
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STARS: 5
So I had been having some cooling issues (outlined previously here , and here ). Last week I was able to track down an OEM, Wahler brand thermostat. Swapped it in over the weekend and lo and behold, the issues were solved! Merc ran between 82-88*C, holding pretty steady at 85*C the whole time. Temp really only reached up higher (maybe 90*C max) when coming back to traffic speeds after being at freeway speeds, and would drop back to 85*C shortly after.
Thoughts on the thermostat though: I boiled both it and the old T-stat and they had nearly identical start to open/fully open temps. The Wahler one though did have a larger diameter valve, as well as a different shaped flange where the valve met the body. I guess the shape and size difference was enough to impede flow on the aftermarket t-stat. Other thing that seems odd is my mechanic had done the first t-stat swap, and he usually uses high quality parts, so I would’ve thought the thermostat he had in would’ve been correct, but it had the same issues as the aftermarket one.
Anyways, glad that that issue finally (hopefully) seems resolved. Now I can turn my attention to any other needs the ole girl throws at me.
"Chan - Mid-engine with cabin fever" (superchan7)
06/12/2017 at 19:23, STARS: 0
I think it’s hilarious how Benzo coolant gauges read above the middle at operating temps. Yours is skewed, though, so it still looks middle-ish.
"BJohnson11" (brettjohnson01)
06/12/2017 at 19:25, STARS: 0
Huh? 90*C is pretty smack dab in the middle of the gauge on this car.
"Agrajag" (Agrajag)
06/12/2017 at 20:22, STARS: 0
Missed your other posts about this, but my 240D hovers right around that 85 mark in the summer. On really hot days and climbing hills or sitting in traffic, it will approach and stop at the third mark(90?). Only once while sitting in horrendous traffic in near 100 weather did it crest that mark. Turned the heat on and it came back down to just above 80.
"BJohnson11" (brettjohnson01)
06/12/2017 at 21:12, STARS: 1
Yea I knew 85 was where I needed to be. Mine never got over 100, but would sit steady around 95. Some reading suggested aftermarket thermostats are a very common point of problems. Glad the OEM t-stat fixed it all.