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Car Forum / Nissan / Nissan Maxima / December 200694 Max thermostat question
I just put a new 180degree Nissan t-stat in my 94 GXE because the engine wasn't heating up to operating temp in cold weather. Now it heats up to operating temp properly but I still don't get any hot air from the heater. After 3 miles or so, the temp is just a hair above the halfway mark on the temp gauge and the fans are coming on. I get out to check under the hood and the upper rad hose is hot but not under any pressure, and then the fans go to high speed, which means the coolant temp is above 212degrees. At that point, I finally get heat from the heater. I've bled air from the bleed air screw on the top of the intake manifold. The vacuum operated heater valve is working properly. It seems like the new t-stat is not opening until it is REALLY hot, but shouldn't I be getting hot air from the heater fairly quickly (after a mile or so)?? Not sure what's going on here. Do I have a malfunctioning new thermostat?? The engine coolant temp sensor was a replaced about 2 years ago and I'm pretty sure it's working properly. Any thoughts?? Thanks! Chris H. 94 GXE, 06 SE Might be time for a full system flush.  SignaturePosted via a free Usenet account from http://www.teranews.com >I just put a new 180degree Nissan t-stat in my 94 GXE because the engine >wasn't heating up to operating temp in cold weather. Now it heats up to >operating temp properly but I still don't get any hot air from the heater. >After 3 miles or so, the temp is just a hair above the halfway mark on the >temp gauge That seems a bit high. My system is working perfectly, and once it's warmed up, the temp needle never budges off the "p" in "Temp" on the guage, which is below the half-way mark. > and the fans are coming on. I get out to check under the hood and the > upper rad hose is hot but not under any pressure, and then the fans go to [quoted text clipped - 5 lines] > shouldn't I be getting hot air from the heater fairly quickly (after a > mile or so)?? That's might be a bit soon to be expecting heat. > Not sure what's going on here. Do I have a malfunctioning new thermostat?? > The engine coolant temp sensor was a replaced about 2 years ago and I'm [quoted text clipped - 5 lines] > Chris H. > 94 GXE, 06 SE Maybe a partially blocked heater core and radiator? Bill G '91 SE Auto No, the system is perfectly clean AND I just put a new radiator in after breaking the upper hose nozzle. I think the problem was, I didn't bleed all the air out of the block and it caused a "bubble" to form and which didn't allow the pump to circulate the coolant until it got really hot and expanded to allow the pump to "prime" itself. I remember now I had the same problem w/ my old 90 GXE. However, I have to replace the new rad because the it has a slight leak which allows pressure to vent off when the engine cools down and then will not create the vacuum required to pull coolant back out of the overflow reservoir. Sh*tty chinese aftermarket plastic radiators!! Chris 94 GXE, 06 SE >>I just put a new 180degree Nissan t-stat in my 94 GXE because the engine >>wasn't heating up to operating temp in cold weather. Now it heats up to [quoted text clipped - 32 lines] > Bill G > '91 SE Auto 3gen GXE heater system depicted at pages 7, 8 http://www.cardomain.com/ride/748507/7 |
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