Q: Bubbling behind dashboard when starting car

asked by on June 06, 2017

Recently my car had quite a bad radiator leak which I had to add water to it every morning until I found a product called K Seal which worked ok for about a month then one day there was minor steam coming from the hood after a short run. After I turned the car off I popped up the hood and there was a minor to moderate mess of coolant spray. So the next morning I topped up the radiator with water and slowly drove to my local garage to get fixed. It was a repair not replacement then I was on my way thinking everything would be ok. The next morning I checked radiator reservoir and it seemed ok but on start up there was a gurgling sound coming from behind the dashboard which lasted a few seconds. The following day I checked the radiator reservoir but it seemed a bit low so I re-called the mechanic and took it back. Turns out he forgot to put a hose clamp back on. He fixed it and again I was on my way. It's been about two weeks now and no leak thank goodness however it's still gurgling on start up? My car is a 1987 Honda Prelude 2.0 si 4WS ALB however looks like 1988 model. My car runs well, no smoke. The temperature gauge never goes past half way.

My car has 318000 miles.
My car has a manual transmission.

Cooling System Flush $178.82 - $215.42 Get a Quote
Heater is not working Inspection $79.99 - $99.99 Get a Quote

Hi There, It sounds like you may have air bubbles in your cooling system. Typically, this is easily fixed by having the cooling system flushed. The heater core is also located behind the dashboard in your vehicle which is likely where the sound is coming from. The [heater core]((https://www.yourmechanic.com/services/heater-is-not-working-inspection) is a small radiator like unit that circulates the hot coolant from the engine through the heater core which then uses this warm coolant to heat the inside of the car with the help of the blower motor that blows the warm air through the vents inside the car. I would suggest having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Everytime I accelerate it sounds like a lawn mower

I think may need bushings or shocks replaced, also there's some kind of whining in motor

My Ford Fusion steering wheel is locked and I’ve tried to unlock it but I had no luck.

2002 hyndaui accent GL

Pressed the gas pedal and the car didn't move forward. It rather rolled backwards because the vehicle was on a hilly place. What cold have happened?

Hi there. If a battery cable is loose or corroded the computer and components in the vehicle will shut down some circuits that are unable to get a good connection. If the vehicle makes the issues again then I recommend...

New exhaust gasket and manifold, still have exhaust leak.

The trouble with small exhaust leaks is that they always turn into large exhaust leaks. The hot gas leaking past the gasket will eventually burn up the gasket making the leak worse. If not corrected, it will also burn the...

Related articles

2012 Honda Civic vs. 2012 Ford Focus: Which One Should I Buy?
One of the best ways to cope with pain at the gas pump is to look at downsizing your vehicle, and today’s compact cars are a great option that allow you to keep the space that you need to move...
The Best Used Cars to Buy for Families
If If it’s time for you to search for the top used cars specifically for families, check out the list we’ve put together of the top five. The list of must-haves Typical items that families are looking for in their...
The Best Used Cars to Buy If You Have 3 or More Kids
If If you have three or more kids, you could probably get by with a mid-size sedan if all you want to do is take them from Point A to Point B. Realistically, though, having kids means music lessons, athletics,...