Question about 1990 Toyota Corolla

1 Answer

Heater core 1990 toyota corolla how do u change it

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

To begin, if you have A/C, you're screwed. You HAVE to take it into a shop cause the system has to be discharged. Otherwise: pretty much you need to take apart the entire dash. Well, the lower portion anyways. Take all the cover panels off, then take out the center console, and the plastic around your shifter. After that, take out the metal supports for the dash. Then take the duct between the fan (far right) and the heater unit (center) out. Now, you're left with the heater unit which is in the center. Go under the hood and around that center area you'll see two hoses coming out of the firewall. Drain the radiator, and then disconnect those two hoses. Now you can take out the heater unit. Inside the unit is the heater core. In order to install, just do the reverse. Hope this helps.

Posted on Feb 25, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Heater core hot but not in cabin

the damper at the core must be open,
so the rules are" (heat exchangers) 101
1: hot engine, yes.
2: hot core, yes. (water must flow and both tubes hot to core)
3: air flow through core, not. (fix cause, if blower is running on high
then the damper is closed.
do you need a drawing? the FSM covers that , all cars, factory service manual even shows every step, in diagnosis.
1990 is a toyota corolla. so books on that car , match too.. hint?

they make 2 kinds if 1990
one with cable damper (temp)
and with water valve. got valve>y/n, no then its damper
this is a cable car, so the cable must move the valve or the damper
open fully to get hot air

valve below. (1990 corolla book)

using 2 persons, make sure the valve works
and is not clogged inside. it.


Feb 18, 2015 | 1990 Geo Prizm

1 Answer

Block heater installation on 2012 toyota corolla

if the cores are blocked the the only fix is to replace it with a new one . C heck first that the heater controls and the hoses are working and clean.

Apr 03, 2014 | 2012 Toyota Corolla L Sedan 1.8L 4-cyl....

1 Answer

No heat coming out on windshield defroster

First thing to do is check your coolant level. If its low the first thing to starve is the heater core. Then feel your heater hoses when its warmed up. They should both be warm. If only one is warm its the heat control valve that isn't working. If they are both cold you may need a water pump. Hard to tell from here.

Oct 27, 2013 | 1990 Toyota Corolla

1 Answer

Water leaking from driver side of my toyota 1990 pick up

If interior leak could be bad heater core or hoses through firewall into heater core. Start with easiest- hoses.

Apr 15, 2013 | 1990 Toyota Pickup

1 Answer

What's a 1990 Toyota corolla towing compacting?

Vehicles covered: 1990 Toyota Corolla 1.6L EFI DOHC 4-cylinder

For a 1990 4-cyl Corolla, the max Gross Trailer Weight spec is 2000 lbs.,
with a max ****** weight of 200 lbs.


Feb 18, 2012 | 1990 Toyota Corolla

1 Answer

I have a toyota corolla vvti spirit 2002. its heating system does not work properly. it takes long to operate and heat produced is not enough to worm the car

the most affordable thing to do is either flush radiator and change thermostat.and see what happens the other thing is your heater core is clogged or is no good

Jan 30, 2010 | 2002 Toyota Corolla

1 Answer

No heat/defrost 01 corolla

Sounds like you have air trapped in the heater core when you flushed the heater core. loosen the upper most heater core hose and run the engine untill coolant seeps out. Wait until the coolant has reached running temperature.

Jan 17, 2010 | 2001 Toyota Corolla

1 Answer

No heat coming out of the vents

is it flowing into the heater core check line at heater core when engine is warm hoses should be warm as well if they are not its possible thermostat is stuck.

Jan 10, 2010 | 2001 Toyota Corolla

1 Answer

1990 toyota corolla wagon 1.6 liter 5 spd. overheating

you've got a possible blockage in the head or block.

Oct 03, 2009 | 1990 Toyota Corolla

1 Answer

Where is the heater core on a 1996 toyota corolla located? Is it accessible to a novice mechanic?

the heater core is located under the dash but you have to take the whole dash out of the car and yes you can do it but your looking about 4-5hours to fix maybe more

Feb 24, 2009 | 1996 Toyota Corolla

Not finding what you are looking for?
1990 Toyota Corolla Logo

Related Topics:

173 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts


Level 3 Expert

77186 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8737 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides