Quote:
Originally Posted by JMan300sd
I have an odd problem and I have a feeling someone on here can point me in the right direction. My AC blows pretty cold, but with the AC on the car seriously drags ass. The second I turn it off my acceleration improves very dramatically and vice versa. In addition to this, on long drives or in heavy traffic the engine gets very warm with the AC on (110). Ive already flushed the radiator, changed the thermostat and checked the fan clutch. I dont know where next to check. Is it perhaps the drive belt being too tight?
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My 83 300SD behaves the same way with the AC on, although I rarely test its performance with the AC off. I almost always have it on because the heat is too unbearable around here, and when I drive in city traffic the coolant temp reads about 105C to 109C. I get about 5 to 10 degrees lower on the highway. And yes, it drags.
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1983 300SD (W126, OM617) with 404k miles!
(OK, so the engine was replaced at 147k mi)