Q: Overheat but gauge is not on H

asked by on March 04, 2016

December 2014, my car started overheating. We( bf and I ) and helped from Kim Auto and Tap's Auto repair put in new timing belt, new radiator, new water pump ( 2 didn't work ), new spark plugs by me, new battery by me, new coolant fan switch, oil drain plug, fix power steering pump, alternator, air filter, that plastic mold for air filter, dist rotor, fuses by me, radiator cap, coolant temperature sensor gauge by me, and replaced the port vacuum switch and this is the last part I added. I turn on the car. No overheat. I thought I solved the problem. 2 hours later, I had to go to work. As I was driving the car, the gauge slowly moved up not to H but to the line just before H. I feel like I am losing my mind. They checked the engine cap to see if there is any white smoke for head gasket. Nope. What else should I look for? Please and Thank you.

My car has 277785 miles.
My car has an automatic transmission.

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

You did not mention the thermostat being replaced. If you did not replace it, then it may be sticking or not opening. The next thing to check is to see if the fans are coming on before the temperature gets too hot. Sometimes the fan motor has a dead spot and will not come on without moving it by hand or driving above about 45 mph. I recommend checking the temperature at the thermostat housing to see if the thermostat is opening as it should. Check the upper and lower radiator hoses when the engine starts getting hot to see if the upper and lower hoses are both hot, but the lower hose may be a little cooler due to the radiator cooling it down. If the radiator is defective, it may not be cooling the engine enough due to clogged passages.

Have a mechanic, like one from YourMechanic, check for proper flow of the radiator, thermostat, and then see if engine has a bad head gasket. They will be able to come to your home or office to properly diagnose your car’s overheating issue so that you can quickly have this problem resolved.

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

car overheating 225

Normal engine operating temperature is up to 225 degrees. As long as you are not over that value, the engine is not overheating. Intermittent cabin heat means there is an obstruction in the coolant flow and that obstruction can be...

Steering wheel shakes when applying brakes

The rotors and pads should be replaced as a set. If not, then you will not have even wear and diminished brake stopping power until the two components are seated to one another. Sometimes cutting a rotor will not...

High-pitched constant beep

Hi, thanks for writing in. There are two places that this can normally come from. The air suspension compressor is known to make this kind of high pitch sound. The third row seats will also make this kind of high...

if my alternator fuse is blown would it make sense for my car not to start?

Unfortunately, the mistake of hooking up the battery cables in reverse may have causes several sensors, relays, and electrical components to be damaged during the attempted jump start. There are most likely multiple electrical issues that need to be diagnosed...

I do not know how many motor mounts there are?

This engine is mounted on two liquid filled motor mounts. The engine mounts are located near the front sides of the motor and has one on each side. The mounts are different for the left and right. The transmission mount...

Clunking noise hear it at speeds of 35-40 loud

Hi There, What you are describing sounds like a bad or worn out ball joint. A ball joint is designed to pivot through multiple planes. Of course, because the ball joint constantly pivots at different angles, it tends to wear...

I have a 1995 Lexus LS400. Yesterday, the speedometer stopped working and the engine was sputtering.

This may be caused by a faulty transmission speed sensor. The speed sensor reads the rotational speed of the reluctor wheel, located within the transmission. The speed sensor also controls the anti-lock braking system. Driving with a bad speed sensor...

how to increase horsepower for my lexus rx 300 v6 240 km/h

Hi there. Typically when you make an aftermarket intake improvement, the next evolution is to find a way to increase fuel flow or ignition timing to allow fuel to burn more efficiently within the combustion chamber. This can be completed...

Wheels locked up

Hi. There are many possibilities to why the wheels may be locked up, which include, brakes, bearings, transmission, etc. You may want to enlist the help of a mechanic, like one from YourMechanic, who can not only diagnose why the...

Related articles

Top 10 Factors to Consider When Buying a Luxury Car
The The idea of owning a luxury car is appealing. The glossy paint, swoopy lines, and prestigious badges speak of the owner’s success in life, while the interior opulence offers scented leather surfaces, high-tech telematic devices, and all the creature-comfort...
A Buyer's Guide to the 2012 Lexus GS450h
The The 2012 Lexus GS450h is for those who want to drive a hybrid, but would prefer to still enjoy a luxurious and safe ride. Fortunately, as this sedan proves, going the hybrid route doesn’t have to mean you lose...
A Buyer’s Guide to the 2012 Lexus CT200h
Although Although you wouldn’t know it from appearances, the 2012 Lexus CT200h actually shares a lot in common with the Toyota Prius. Mainly, it comes down to their engines (1.8 liters) and hybrid architectures. However, with the CT200h, you also...