Q: Overheating issue with my 1994 Honda Accord

asked by on

I had a bad headgasket and put in stop leak...Ended up getting a new headgasket..head was milled and cleaned..car is overheating and i took out spark plugs and checked for moisture..there was none..put n new radiator and new thermostat and car still runs hot.. cooling fans work when the temp gets 3/4 up to hot..any ideas what could be making my car run hot??
My car has an automatic transmission.

Stop leak products will plug up cooling passageways, particularly in the radiator, and consequently OEM manufacturers such as Honda discourage use of these products. In any vehicle, if there is a "leak", of anything (oil, refrigerant, coolant, etc.) the leak has to be repaired using standard, OEM approved professional techniques and stop leak products simply do not qualify as such. In your circumstance, you have a new radiator which hopefully does not have any residue from previously applied stop leak products.

Overheating can be due to lean engine operation. That possibility can be diagnosed by YourMechanic. Trapped air in a cooling system can cause overheating, so you want to rule that out, too. Typically, there are air purge ports that are opened when refilling the cooling system. A defective radiator cap can cause overheating if the cap is unable to withstand normal system operating pressure.

If all these are ruled out, one approach you can try is use an infrared thermometer to determine the actual operating temperatures, particularly at entrance and exit of radiator and with those measurements determine whether the cooling system fan(s) are coming on at the right (factory specified) threshold. If fan operation is delayed, or the fan motor is not running at the required speed, that could be causing or contributing to the problem. There are timers, relays, and sensors involved in the cooling fan(s) systems, not to mention the condition of the fan motor and bearings.

If you want a professional to evaluate the overheating issue, and identify the causes of the problem, feel free to schedule an overheating diagnostic with a certified professional from YourMechanic.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Overheating issue with my 1994 Honda Accord

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

Get a quote

What others are asking

Q: How do I fill the cooling system in my 1994 C220 Mercedes

To properly fill your cooling system, you need to start with the engine cold. With the engine off, fill the radiator slowly until the level is about 1"below the neck. Leave the cap off and with the car in park...

Q: heater stopped blowing hot, then the temperature gauge when hot and then there was steam and liquid everywhere.

What you are describing could be due to a sudden coolant leak (broken hose, for instance) that caused overheating or the overheating occurred first and that itself caused a hose to burst or the radiator pressure cap to open to...

Q: Car has pick up problem

Hello. It seems like your vehicle is having performance related issues due to a fuel problem. A few things I would check are the fuel pressure regulator, the fuel lines, and the coolant temperature sensor. An issue with any of...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...