Question about Saturn S-Series

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Flush clogged heater core

No or very little heat coming out of my 1997 saturn SL heater for the past 2 years or more. system may have never been flushed since new.

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  • Saturn Master
  • 5,252 Answers

A quick check of the heater core is to feel both heater hoses after the engine has fully warmed up. If both heater lines are hot, the coolant is circulating. If one feels cooler than the other, flushing it backwards with a low volume garden hose might help, unless there is a water valve in one of the lines that is closed-only some have a valve, not all cars. Pull the hoses off and try it. Some have even used an air compressor blow gun. If a lot of crud comes out, you may have fixed it.
Sometimes, the older cars get, the rubber seals on the heater case deteriorate, so cool air can sneak in and the heater just doesn't work as well. Big job to fix that. Try flushing the core if you think it needs it, and check heater case doors operation-maybe the temperature blend door is not opening fully.

Posted on Dec 26, 2013

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Posted on Jan 02, 2017

  • 34 Answers

SOURCE: Heater core is clogged, not hot heat coming out.

you can try to flush it out by removing both heater hose going into the core and coming from the core. Hook a garden hose to the hose going in and then try flushing the hose going out. Normally once a heater core is clogged there is only the option of replacing it.

Posted on Oct 08, 2009

  • 9 Answers

SOURCE: no heat coming out of vents

be sure you have no coolant leak and check if you have a blead valve on the engine for the coolant if you do, blead the air out

Posted on Oct 18, 2009

Boole5555
  • 160 Answers

SOURCE: I have a 1997 Saturn SL2. I have no heat. We

It is your heater core, there is nothing else left.

The heater housing is usually under the dash, and it must be removed to gain access to the heater core.Procedures for removing a dash, and heater core vary. But for the core:
The heater housing must be removed, and then you
"remove the panels" or "split the case"1c3d50c.gif (Usually screwed together.)
Remove the coolant hoses, the cable and vacuum control line.
Remove the heater core bracket and clamps.
To install the new heater core, reverse the removal steps.
Core leaks **** because of the core's location deep within the firewall/ dashboard of the car.
So remember to liquid test your new one before you put it back in, or you could be sorry.

Posted on Jan 07, 2010

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  • 1403 Answers

SOURCE: just flushed rad heater core and block because i

will try to help.have you replaced the thermostat? have you checked visually to make sure your cooling fan for engine is coming on?after the engine reaches operating temperature,the fan in front of radiator will come on,it's heat activated. the fan relay in black box under the hood may be bad,or the fuse in that box may be bad,or the fan motor may be bad.take the radiator cap off,when engine cool,start motor,do you see coolant flowing,after the engine reaches operating temperature?you may have a clogged radiator,simple fix. just flush the radiator with a flush,you can purchase at any parts place.hope this helps,and as always, thank you,for choosing fixya.com

Posted on Dec 01, 2010

  • 1 Answer

SOURCE: how to flush heater core 1997 saturn

how could i get my ac to work it just leak out d anti freezz

Posted on Jan 22, 2011

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I have a 1997 Saturn SL2. I have no heat. We have replaced the thermostat, the water pump and flushed the system. Still no heat! What's next..replacing the heater core or power flushing? If its...


It is your heater core, there is nothing else left.

The heater housing is usually under the dash, and it must be removed to gain access to the heater core.Procedures for removing a dash, and heater core vary. But for the core:
The heater housing must be removed, and then you
"remove the panels" or "split the case"1c3d50c.gif (Usually screwed together.)
Remove the coolant hoses, the cable and vacuum control line.
Remove the heater core bracket and clamps.
To install the new heater core, reverse the removal steps.
Core leaks **** because of the core's location deep within the firewall/ dashboard of the car.
So remember to liquid test your new one before you put it back in, or you could be sorry.

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