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My heater radiator is leaking, can I repair it myself? How do I access it?

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If you are talking about your heater core, then you can do it youself, but it is a very big job if you are a newbe. you will have to pull the whole dash out.

Posted on Nov 16, 2009

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How to fix my heater?

First check the heater hoses coming through the firewall from the engine are not leaking, damaged or blocked. make sure that the water is passing through these when you turn on the heater. My guess is that is that the hot water from the engine is not circulating through these pipes to the heater radiator inside the vehicle at the bottom center of the dash board console. Check to see if the cable connecting the heater control knob has not come loose and the check that there is no leak in that heater radiator by inspecting that the surrounding areas are not damp by the foot-wells. If so remove that radiator and send in to a radiator repair center to be repaired. if they cannot repair it then te heater radiator will have to be replaced.

Jul 13, 2014 | 2006 Tata Indica LSi

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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.

Dec 22, 2010 | 1998 Lincoln Town Car

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Temp light flashes,, coolant leaking into the car above the gas pedal.. air in the cooling system

Sounds like the heater radiator core under the dash has sprung a leak. Temporary fix to keep the cooling system operating is to bypass the heater by disconnecting the hoses where they go through the firewall and linking them together.
It's usually a big job to remove the under dash ducting to access the heater core, remove it, get it repaired and then replace all the bits.

Aug 19, 2010 | 1994 Audi Cabriolet

1 Answer

1998 Buick LeSabre 3800 V6. Coolant is leaking fro an "L" shaped hose that leads from the engine block to other heater hoses. Is this a major repair or can i do it myself?

My guess is you can fix it yourself if you posses rudimentary repair skills. Dump the radiator. Remove the hose, Take to parts store. Try to describe to them. Take a picture beforehand, just in case. Replace hose, refill radiator. Start engine, put heater on high, top off radiator again, close radiator, check for leaks, that's it. If you are really cautious then you will fill with all water first, check for leaks, dump and refill with proper antifreeze/water mix.

Mar 04, 2010 | 1998 Buick LeSabre

1 Answer

I have an 02 Mazda Tribute with a leaking radiator.Are there any tricks in removing the radiator to repair it? The Radiator People told me that they have never done one of these before and may have to...

1. Drain coolant
2 Remove lower splash shields
3. Disconnect the lower radiator hose and the high pressure transaxle line
4. Lower the vehicle
5. Disconnect the transaxle return line
6. Disconnect the upper radiator hose and degas hose
7. Position the hood latch assembly out of the way
8. remove the 2 bolts and the center support
9 remove the 2 top bolts retaining the cooling fan to the radiator
10. remove the upper radiator support brackets, and remove the radiator from the vehicle
11. To install, reverse the removal procedure

Feb 07, 2010 | 2002 Mazda Tribute

1 Answer

Leaking heater radiator

get some radiator stop-leak from wal-mart. dump the pellets in the radiator and it will fix its self

Dec 18, 2009 | 2001 Volkswagen Jetta TDI

2 Answers

Is there a cap on the radiator to fill with antifreeze? I would like to add some leak repair and want to put it directly into the radiator, not the expansion tank.

No, there is no direct access to the radiator. You can only put fluid in the reservoir. And I agree with Ziggyone, the coolant repair will clog the heater core and probably the radiator.

Dec 03, 2009 | 2003 Ford Explorer

1 Answer

My crown victoria is leaking radiator water inside the car. mainly on the passenger side beneath the glove compartment. It smells really bad, and I can't find the leak. Is there any way to get detailed...

Yes, it's the cars heater core leaking. The heater core is like a mini radiator under the dash-coolant circulates through it from the engine to provide the heat. To change the heater core is a very labor intensive job. You really need to get a repair manual, or go online to 'alldata' diy repair where you can sign up for 1 year or more access to your Crown Vics repair info. Excellent source for diagrams and instructions. I believe one year is $16.95, good for ONE car info for a year.

May 01, 2009 | 1996 Ford Crown Victoria

1 Answer

Leaking Heater hose or Core

Disconnect the negative battery cable.
Position a drain pan under the radiator, open the drain **** and drain the cooling system to a level below the heater core.
NOTE: Plug the heater core tubes to avoid spilling coolant in the passenger compartment during removal.

Disconnect the heater-to-engine coolant hoses from the core tubes on the fire wall, in the engine compartment.
NOTE: On some early model vehicles, the cabin light mounted under the dash may interfere with cover removal. If necessary, loosen the retaining bolt and reposition the light housing with the wiring attached.

From the passenger compartment (under the dash) remove the heater core rear case cover-to-cowl screws, then remove the cover from the vehicle.
NOTE: On a few of the early model vehicles covered by this manual, some of the heater core cover screws may be partially/fully covered by the dashboard. Be sure that all are removed before attempting to remove the cover. If necessary, unbolt and reposition all/part of the dashboard for better access.

Remove the straps or brackets from each end of the heater core.
Carefully remove the heater core from the cowl and case.
Installation is the reveres of removal. Run the engine at normal operating temperatures and check for leaks

Dec 01, 2008 | 1993 Chevrolet S-10

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