Quote:
Originally Posted by Dazza335iC
Same exact thing happened to mine. It seems the 35d thermostats are a known weak point.
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ALL thermostats are a weak point. It's the technology: modern T-stats are designed around a wax phase-change pellet and have 2-stage behavior. The wax pellets become degraded over time (about 8-12 seasons, depending on how bad the seasonal swings are) and they fail to COLD because the wax pellets allow stage one early opening to occur earlier.
It's just a technological limitation. I'd wager that 75% of cars on the road today have t-stats running colder than designed temperature specifications. Nearly every used car I've ever put my OBD scanner to ran colder than spec.