Question about 1993 Subaru Impreza

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Fuel guage just had the heater core repaired on 93 Subaru impreza. Got it back from the mechanic and now the fuel guage does not work. He says it is the sending unit. Odd that the guage was fine before the dash was torn out. How can I check this myself? Gooday

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Id take it back and ask them to fix it since it worked before they did the work on it

Posted on Jan 11, 2009

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2 Answers

How to remove and replace heater gore


Welcome to Fixya

Remove the heater assembly if necessary, the cooling system must be drained before removing the heater core. When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement. The heater housing is disassembled to get to the heater core.

Heater Core

  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.


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May 14, 2011 | 1996 Subaru Impreza

1 Answer

How to replace heater core on subaru impreza 98 step by step


If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing
  • The heater housing is usually under the dash and must be removed to gain access to the heater core.
  • Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.
f74-01.gif The heater housing is disassembled to get to the heater core. Heater Core
  • Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
  • Remove the heater coolant hoses.
  • Remove the cable and/or vacuum control lines (if equipped).
  • Remove the heater core securing brackets and/or clamps.
  • Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
  • To reinstall the heater core, reverse the removal steps.
When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

Jan 06, 2011 | 1996 Subaru Impreza

1 Answer

Just fueled up at the service station now the fuel guage keeps going up and down saying full then empty 2010 subaru impreza


Possible fault in the fuel guage float as it mught have got damaged and is floating according to the movement of the fuel in the tank than to float up.
Also it is possible that the fuel tank rheostat is faulty or the ground connection of the rheostat.
check also the dash cluster to the guage for any loose connections.

Oct 30, 2010 | Subaru Impreza Cars & Trucks

3 Answers

Overheating radiator without leakage


I posted this in a different web sight I hope it helps.


Re: Overheating and blowing cold air
I have been a mechanic for 20 years. Your problem is the heater core is plugged. The cold water from the radiator blows directly at the thermostat keeping it closed even when you are overheating! BAD DESIGN!! If you look at the water flow charts in AllData you will understand. If you rev the motor to 3,000 rpm's the turbulent HOT water at the water pump impeller (near the thermostat) will reach the thermostat to open it and the car's temp will fall very fast to the correct temperature. If you remove the thermostat it will not overheat but will run way to cold. If you bypass (loop) the heater core it will not over heat.

The hot water that leaves the heater core returns to the engine at the thermostat. It is the only hot water introduced to the thermostat to keep it open and allow the water to flow from and to the radiator. I normally just back wash the heater core and get large chunks of rust flake out then its fixed. Back wash then froward wash repeatedly many times. Also flush out the motor so you don't re plug the heater core. I hope you have now blown the head gaskets or cracked a head yet. Make sure to run the proper coolant in the car so you don't promote more rust flakes. And bleed the air out as mentioned in detail by other posters.

Nobody knows this little secret. Not even Subaru mechanics at the dealer, no TSB (Technical Service Bulletins a special note after the fact to mechanics). After days and days of trouble shooting a 1993 Subaru Impreza (2.0?) I looked at the water flow chart and then it was clear what was happening. This phantom overheating problem stumps the best mechanics and sends many Subarus to the crusher.

http://www.subaruoutback.org/forums/...threadid=17264

Jan 16, 2010 | 1990 Subaru Legacy

1 Answer

Heatere core replacement


Be careful you dont over heat soon. I posted this in a different web sight I hope it helps you.

Re: Overheating and blowing cold air
I have been a mechanic for 20 years. Your problem is the heater core is plugged. The cold water from the radiator blows directly at the thermostat keeping it closed even when you are overheating! BAD DESIGN!! If you look at the water flow charts in AllData you will understand. If you rev the motor to 3,000 rpm's the turbulent HOT water at the water pump impeller (near the thermostat) will reach the thermostat to open it and the car's temp will fall very fast to the correct temperature. If you remove the thermostat it will not overheat but will run way to cold. If you bypass (loop) the heater core it will not over heat.

The hot water that leaves the heater core returns to the engine at the thermostat. It is the only hot water introduced to the thermostat to keep it open and allow the water to flow from and to the radiator. I normally just back wash the heater core and get large chunks of rust flake out then its fixed. Back wash then froward wash repeatedly many times. Also flush out the motor so you don't re plug the heater core. I hope you have now blown the head gaskets or cracked a head yet. Make sure to run the proper coolant in the car so you don't promote more rust flakes. And bleed the air out as mentioned in detail by other posters.

Nobody knows this little secret. Not even Subaru mechanics at the dealer, no TSB (Technical Service Bulletins a special note after the fact to mechanics). After days and days of trouble shooting a 1993 Subaru Impreza (2.0?) I looked at the water flow chart and then it was clear what was happening. This phantom overheating problem stumps the best mechanics and sends many Subarus to the crusher.

Dec 11, 2009 | 1990 Subaru Legacy

1 Answer

93 Subaru Heater fan not working


Have you checked the earth? You may find current is going to earth via the fans. Find the earth for the heater and make sure it is earthing really well. Hope this helps.

Feb 28, 2009 | 1993 Subaru Impreza

1 Answer

Accelerating


once you change fuel octane it may run sluggish because the car is used to running at a better octane to run more efficient. go back to 93 and see if that may change it back to normal (note that it may take your car a few runs to get back to normal)

Feb 23, 2009 | 1999 Subaru Impreza

4 Answers

'93 Subaru Impreza starting hesitance


TRY THE COOLANT TEMP SENSOR THAT ACTS AS A CHOCK .TELLING THE COMPUTER TO RICHEN OR LEAN THE FUEL BASED ON COOLANT TEMP

Jan 30, 2009 | 1993 Subaru Impreza

1 Answer

1993 subaru impreza L heater is not working


if the engine temp seems normal on the dash gauge then it may be a clogged heater core.have the sysyem flushed-it worked for me recentlythe other options may be a heater door not closing..some are vacuum activated a flush is a good place to start..good luck

Jan 19, 2009 | 1993 Subaru Impreza

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