Question about 1990 Honda Accord

1 Answer

Coolant leaking from under dash - 1990 Honda Accord

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 443 Answers

Your vehicles heater core has developed a hole and or leak, the heater core is the unit that looks like a small radiator that transfers heat out of the coolant and into the interior of your vehicle in order to keep you nice and toasty warm when you use your heater, it is tucked up under the dash behind the glove compartment, so when it is leaking, this will leak coolant into the interior of your vehicle.
It is most fesable to replace the heater core, rather than to repair it.

Posted on Aug 23, 2010


3 Suggested Answers

  • 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 expert 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 repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 198 Answers

SOURCE: coolant leaking under dash in

This leak is located on passeneger side most likly.This is where your heater core is located.Over time heater cores can go bad, they are like a miniture radiator.If coolant hasent been changed regularly,the heater core can rot out causing leak.If you are luckey it could be one of the hoses going to heater core,but id hate to say this is rare.

Posted on Feb 09, 2011

  • 641 Answers

SOURCE: water leak from under dash on pass. side. not

you may want to check your AC drain it may be clogged allowing water to back up and leak in to vehicle

Posted on Nov 15, 2009

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

No heat in 1999 sunfire

This can be a few things, for starters most common in my experience is when you have air bubbles in the coolant system (Mostly when its been recently drained or flushed) You will have no heat. Also, if your heater core has failed (in most cases water will leak from under your dash) you will loose heat and your vehicle will most likely overheat. Last but certainly not least, a failing head gasket could cause combustion to leak into your coolant system causing air bubbles which could make your heater not work which could also cause overheating in further along failing head gaskets. Things to check would be a leaking heater core under the dash, overheating, check engine lights and bleeding the coolant system.

Feb 22, 2014 | Pontiac Sunfire Cars & Trucks

1 Answer

Coolant leak under dash

Heater core leaking. It will cause low coolent levels, moisture on the glass that won't go away. Green liquid leaking from under dash, wet floorboards. Hissing sounds when car is turned off coming from behind the dash. You may have some or all of the above symptoms.

Dec 17, 2013 | 1990 Honda Accord

1 Answer

Leak under dashboard

The only fluids under the dash are coolant that circulates through the heater core, or if you have a manual transmission a failed clutch master cylinder can leak brake fluid under the dash right where clutch pedal is located. If the heater core is leaking, it usually shows up on the passenger side. If it is just plain water, you need to check how rain water could be getting in past the firewall and under the dash.

Jan 06, 2013 | 2007 Nissan Frontier SE Crew Cab

2 Answers

Smells like radiator fluid but its not running hot?

If you smell it in the cabin you probably have a leak in the heater core which is up under the dash. Look under the center portion of the dash on both sides and try pulling the carpet back in that area. Chances are you will find evidence of a small leak. Check all hoses for tightness that run along the firewall in the engine compartment as well.

Sep 19, 2010 | 2001 Lincoln Navigator

1 Answer

I have a 2001 Chevy Blazer. While driving it and running the airconditioner I can smell coolant. I'm having to add coolant regularly, it's obviously leaking somewhere, but I don't see any on the ground or...

Maybe the coolant is leaking into a cylinder, slowly and also leaking out of the head gasket to the atmosphere when running under the increased load of the a/c.

If having to add coolant regularly, you're right, it must be leaking somewhere. It could be leaking out onto a hot part of the exhaust so look around there.

Aug 08, 2010 | 2001 Chevrolet Blazer

1 Answer

Coolant is leaking into the car

Check the evaporator drain, its possible that are clogged (under carpet, under dash passenger side).

Good luck.

May 25, 2010 | 2000 Mitsubishi Galant

1 Answer

Water leaks from under dash on the passenger and driver side and water leaks from the visors on both sides 1997 saturn s series

If you have a sunroof then the problem is most likely a drainage problem with the sun roof. The drains are blocked and the water is running down into the car.

The under the dash thing is the only thing that worries me. That is usually the location where the heater core will leak to. Are you sure it is water and not coolant? Coolant gives off a sweet smell and when it's hot you know cause it stinks.

But my money is on a sunroof leak and drainage problem if you indeed have a sunroof.

Dec 21, 2009 | 2000 Saturn SL

1 Answer

Coolant leak chevy tahoe 02

If the coolant is in the cab they did not cause the problem changing the manifold gasket. It sounds like the heater core has failed, which is under the dash.

May 28, 2009 | 2002 Chevrolet Tahoe

1 Answer

Coolant leak.

i have had these problems,sometimes your rad could leak steam when hot and drivig,some times the cap is leaking orther time the heater core could be leaking.the carpet may be wet under the dash

Apr 04, 2009 | 2000 Ford Taurus

Not finding what you are looking for?
1990 Honda Accord Logo

Related Topics:

256 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts


Level 3 Expert

76649 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

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

Answer questions

Manuals & User Guides