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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   Drive Shaft Repair I have a 2015 Chevy Traverse AWD. The fr...   2006 Toyoto Camry XLE Driver Side Electric Window Trouble Hello, Looking for a little brain help ...   Tierod end change caused some kind of leak Hello so I just took my car to the nearb...   2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes When I bought this car in summer 2023, a... Grounding Cable, 2017 Jeep Renegade Trailhawk The Cable that connects my negative batt... Rough Idle (Found new thing) Hi everyone. First of all sorry for bad ...     equipment hey yall. im a first year engineering st...   HELP I have a 1956 1/2 ton panel truck, 69 35...   Howdy     Just wanted to s...   ABS/Tractiob/Brake Lights on But No DTCs Hello all, Recently while driving m...

Search Auto Parts Search 1990 subaru legacy gauge show overheating while idling Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Car Troubleshooting Guest Anonymous Poster degradationzero@yahoo.com Aug 20, 2008, 8:34 PM Post #1 of 4 (4046 views) 1990 subaru legacy gauge show overheating while idling Sign In I have a 1990 subaru legacy. the heating gauge reads hot every once in a while but the car does not feel abnormally hot. It does this mostly while the car is idling. What could cause this besides thermostat and radiator? the dreaded anser is head gasket! Lisa Tom Greenleaf Ultimate Carjunky / Moderator Aug 21, 2008, 4:56 AM Post #2 of 4 (4041 views) Re: 1990 subaru legacy gauge show overheating while idling Sign In Is fan coming on for radiator? T Guest Anonymous Poster degradationzero@yahoo.com Sep 26, 2008, 8:26 PM Post #3 of 4 (4005 views) Re: 1990 subaru legacy gauge show overheating while idling Sign In yes fan kicks on Tom Greenleaf Ultimate Carjunky / Moderator Sep 27, 2008, 3:59 AM Post #4 of 4 (4003 views) Re: 1990 subaru legacy gauge show overheating while idling Sign In 90 Subaru temp gauge reads overheat at idle - intermittently - fan is on: Ok: Now start the list of ...... 1. Coolant must be known full and staying there. 2. Can you feel heat in the air blowing off from engine fan? 3. Does heater work and change output temps with the gauge or quit blowing heat completely? 4. Does the temp gauge just shoot to max and then return to a normal reading instantly? *********** Trying to zoom in on just what is going on. Erratic gauge reading or a real problem. The water pump may be failing to pump adequate volume of coolant when at idle or low speeds. If raising idle while running warm begins to lower temp we may need to put that on the suspect list. Head gasket could be adding combustion gasses appearing as air in the cooling system. Erratic temp readings would be seen, heater would be intermittent and you would notice overflow bottle too full quickly in conjuction with coolant at the radiator itself not staying full. See if you can observe things like that. Things that could further help diag this: a. A cooling system pressure test. b. Flush cooling system noting how much junk may come out. Try not to allow real overheats till we get to the bottom of this. If just gauge reading is screwed up that will take other observations to nail that down as the problem, T   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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