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E36General discussion and technical help for (E36) 1992-1999 3 series cars. 318, 323, 325, 328.
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Your Ride: 1995 325i
Stuck thermostat?
With the autumn weather settling in the past few days, I've started using the heater. My usual routine is to wait until the temperature gauge has reached its normal operating temperature position, straight up, before turning on the heat. I'd do that, and get normal output, but then after awhile if I want more heat, I don't get it. Even with the heater dial put full on, I get a rather weak heat output. The temperature gauge remains unwavering at the straight up position, and the coolant level is right where it should be. This evening, at the end of a 1.5 hour trip at highway speeds, I checked underneath the hood, the upper radiator hose was hot, the lower cold. Does this mean a stuck thermostat? Remedy is to replace?
With the autumn weather settling in the past few days, I've started using the heater. My usual routine is to wait until the temperature gauge has reached its normal operating temperature position, straight up, before turning on the heat. I'd do that, and get normal output, but then after awhile if I want more heat, I don't get it. Even with the heater dial put full on, I get a rather weak heat output. The temperature gauge remains unwavering at the straight up position, and the coolant level is right where it should be. This evening, at the end of a 1.5 hour trip at highway speeds, I checked underneath the hood, the upper radiator hose was hot, the lower cold. Does this mean a stuck thermostat? Remedy is to replace?
sounds like a stuck thermostat but another cause can be air in the system so try to bleed the system first.
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Your Ride: 1995 325i
Car's in the shop having some pre-winter paint touchup being done, but when it's back I'll try the simple approach by massaging the radiator hoses and seeing what happens...
10-12-2009, 09:43 PM
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