1991 Lexus LS 400 "engine runs hotter heater blows" Questions

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Question about Lexus LS 400

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...engine runs hotter than usual Sounds like a head gasket/cracked head. Does it not heat when you're sitting at a light but then starts to blow lots of heat after you start rolling again? That's a ...

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...hotter. What could be the cause? Quite a few idea's come to mind. 1) Thermostat is stuck open, causing the engine to run cool. 2) The vacuum valve that opens and closes the air "flap" is stuck open, ...

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Question about Lexus LS 400

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...engine run hotter not cooler. good-day ! with engine running and up to tempurature, touch the heater core hoses under the hood. they should be hot both of them. if not, either your low on coolant. or ...

...engine is overheating, it gets hotter while sitting in traffic because the electric fan that cools the engine only comes on at about 225 degrees Fahrenheit. If you had an overheat condition the check ...

...engine is running at normal temps and we have flushed the heater core but it still is only luke warm air blowing out drain the antifreeze ,then add water and when nearly full put about half a cup of ...

Question about Lexus LS 400

1 Answer

...engine will run hotter when this happens. To fix this, start with a cold engine and open the radiator fill cap. Start the engine and top off the coolant. Let the engine keep running and warm up. When ...

Question about Lexus LS 400

1 Answer

engine gets hotter. squeeze the pipes on the rads to help the air come out. when fan kicks in turn engine off and leave to cool down.while you are doing this make sure the fan for heater is off but is

...engine is still running. Also, the car heats up when I drive more than 60 mph. When I slow down, the temperature drops. I ran the heater to make sure the thermostat isn't frozen. The heater blows out ...

Question about Lexus LS 400

1 Answer

...RPM 2001 GMC Yukon Heater blows cold air unless above 3000 rpm and engine temp runs hotter than normal (245-250) at low rpm. Could I have a vacuum problem? check coolant level! look for coolant ...

Question about Lexus LS 400

2 Answers

...from engine compartment entering the vehicle but it is normal to get hot air in vents espacially on todays newer vehicles where the engines are designed to run hotter for emissions control

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