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I need to replace the heater core in 720 1986 Nissan pickup..how hard is it?

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  • Anonymous Mar 15, 2014

    nissan 720 pickup running rough after letting the fuel go low

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Its under the dash youll have to remove stuff to get to it but its about an hour long job not too hard to do

Posted on Sep 02, 2008

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1 Answer

No heat,need to replace thermostat, do not know where it is located


you do not need to replace the thermostat because you are not getting heat. what you need to do is to ensure the heater coolant control is operating to allow hot water through to the heater core.. If the thermostat was faulty you would be overheating or the temp gauge would not be getting of the cold mark.

Dec 26, 2013 | 1994 Nissan Pickup

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Replacing air, water and heater hoses


Must be a heater hose usually I use a box cutter and cut hose and peel back with a screwdriver carefully not to damage fitting. this can cause the heater core to leak. some time they can be seem through wheel well with tire off may be able to reach for removal.

Nov 09, 2013 | 1992 Nissan Pickup

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1993 Nissian D21 truch do not hefat on the inside


Try flushing the hoses out,heater core may be clogged.If it doesn't work then heater core needs replacing.

Feb 28, 2013 | 1993 Nissan Pickup

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I have a 97 nissan pickup manufacturing month of may. I cant find a replacement heater core. all auto parts stores (autozone,orielly,advance,etc..) sell one that is not even close. the 98 frontier has a...


try the auto wreckers or auto recycling many parts are still good most cars/trucks have been in a crash and most wreckers will look cross country and ship them in for you

Dec 27, 2010 | 1997 Nissan Pickup

2 Answers

Heater core replacement


Inspect/Replace 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 19, 2010 | 1997 Nissan Pickup

1 Answer

How to put in a heater core


Inspect/Replace 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 04, 2010 | 1991 Nissan Pickup

2 Answers

Removing the Heater Core


Inspect/Replace 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.

Nov 27, 2010 | 1987 Nissan Pickup

1 Answer

1978 chevy scotsdale heater core


does it have a/c,,not hard to do ,,pull glove box,,there are some screws be hide it u need to get out,&any other that hold the heater core cover & blower assembly on

Feb 02, 2010 | 1978 Chevrolet C1500

1 Answer

Coolant leaking on passenger side floor board from heater core.


that means your heater core is bad. It is not hard to fix but it is time consuming. Heater core is located behind glove box

Feb 01, 2009 | 1987 Chevrolet S-10 Pickup

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