Q: Overheating problems - 1985 Jeep CJ7

asked by on September 26, 2016

My car has been overheating lately. I went to a trip a couple of days ago, and the operating temperature was 175. The car was running well at the speed around 65 mph, when the cooling gauge started rising and reached the red zone. At that point, the car was in the fifth gear so I had to put it into fourth gear and continue driving slower so as to decrease the temperature to around 200, which was still okay to drive at. During the remained miles, the vehicle kept overheating. After the trip, I've done several repairs on the car. I had the water pump, radiator, thermostat and fan replaced. Also, I replaced the clutch and repaired the head. The gaskets are new as well. The engine has been reassembled. Now the car starts idling at 200 but stabilizes. When I start driving, the temperature would be around 175 and then begin to increase and reach the red zone. The car keeps overheating. How can I prevent this? Is there any parts that I should replace?

Car is overheating Inspection $79.99 - $89.99 Get a Quote

It sounds like you still have a blown head gasket or minute crack in the cylinder head or block, both of which can cause overheating. You mention that you "repaired the head," but don’t identify what was done. I would have a professional mechanic, like one from YourMechanic, diagnose the overheating issue in person to isolate this cause.

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

What others are asking

Where would the radiator drain plug be located on my vehicle? 2003 Chevrolet Impala

Hello, the radiator drain plug will be a the bottom edge of the radiator, facing the engine (passenger side). If you drain the coolant, be sure to catch it with a pan of some sort, and properly dispose of it....

Coolant is boiling

You need to check to see if the thermostat is opening properly and if the cooling fan came on. The upper and lower hose should be hot if it is open. If this is your first time running the car...

Car overheating and VSC light coming on

A cooling system pressure test should be performed to ensure that your cooling system can hold the proper amount of pressure needed. If any leaks are found such as a leaking radiator or water pump, these leaks need to be...

I want to know if i should buy this car for $700 or just wait it out.

If the vehicle only needs a new axle (CV driveshaft) and a new radiator, the price is only "average". However, if there are any other defects at all, particularly significant corrosion on the brake and fuel lines, at $700 you...

My truck keeps over heating when heater is on, blows hot air. What can cause this problem?

Double check the coolant level to make sure that after you have the heater turned on your coolant did not get low. If it is full then you need to replace the water pump and the thermostat. The water pump...

Car overheating due to radiator crack

When your engine is idling, the vehicle is likely stopped which lowers the airflow through the radiator. The more airflow the radiator receives the more likely the engine is to remain cool. When the air conditioning is turned on the...

2004 ford focus wagon overheats randomly then kools

Hello, thank you for writing in. The vehicle may be having issues with the components you already replaced, or there may be another problem. At this point, you will want to look into the engine temperature sensors, the radiator cap,...

Car overheats

Overheating is a fairly common issue with many vehicles. The most common cause of an engine to overheat would be a coolant leak. If a leak exists, the engine will not have enough coolant to keep the temperature within specification....

Van overheats, but only at idle - 2004 GMC Savanna 3500

Hello. Assuming that you replaced the fan clutch and the fan is actually working, I think you are on the right track as far as the radiator being clogged. When the vehicle is not moving, it does not have the...

Related articles

Symptoms of a Bad or Failing AC Air Filter
Common signs of a clogged AC air filter include reduced airflow from AC vents, less power coming from the engine, and increased dust in the cabin.
How to Replace an Ambient Temperature Sensor
The ambient temperature sensor monitors the car's temperature inside and out. This sensor allows the AC to maintain comfortable cabin temperatures.
How to Replace a Coolant Temperature Sensor
The coolant temperature sensor switch is not working if the engine emits black smoke. The switch may have failed if the car gets poor fuel economy.