Q: Overheating

asked by on August 09, 2016

Okay so today I did the compression test on the car and I'm kinda scared and stumped at the same time most of the cylinders where about 130 to 135 and the 2 on the the front cylinders 1 and 3 where 120 the first time I did the test and I let then sit for a couple minutes but I did the test again and cylinder 1 got to 135 and held it and cylinder 3 would only get to about 125 I also looked for bubbles coming through the radiator and nothing from any of them when I took out the spark plugs they looked good on the front head and the back ones looked kind of oily when I took the 2 cylinder the first one for the rear head it was kind of hard to get out and looked like it was burning coolant and smelled odd and different from the rest the other ones the rest smelled like gas I thought it was a head gasket leak because the symptoms are the car will run good for a couple of days after I bleed the air out of the system and after like after 3 days it will overheat again and it bubbles at overflow

My car has 110000 miles.
My car has an automatic transmission.

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

When you put pressure in the radiator you are only going up to about 15 psi, but when a cylinder fires, it puts out a lot more than the compression test showed at 125 psi. This is why you are only getting pressure in the radiator while running the engine. You most likely have a blown head gasket on the cylinder number two. When you remove the intake manifold and heads on both sides, check the corners to see if the head and intake is not rotted away and needs replacement. Your compression looks pretty good so you have good pistons. Your best bet may be to have a trained professional come to your car’s location to pinpoint the fault in person and diagnose the cause of the overheating issue.

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

How low can my truck legally be like how high off the ground?

I have never heard of a legal limit for how low a vehicle can be. I would not recommend going below 6 inches for the lowest part of the suspension or you will not be able to go over a...

Engine misfire and traction control

Hi There, It is possible that the misfire (depending on how severe) may have produced enough of a jolt in the vehicle to cause the traction control system to detect a change in the stability of the vehicle. The traction...

When replacing my ball joints on my 2005 dodge Strauss do I need to replace the control arms as well

Hi there. When changing out the ball joints, you don't need to change the control arms if you have a replacement ball joint. However, if you are wanting to replace the bushings and the ball joint, then you may get...

Car shaking when slowing down.

A possible cause of this issue could be a warped brake rotor or a loose suspension part such as a control arm bushing. If your brake rotors are warped and the brakes are applied, this can send pulsation to your...

Oil leaking when car is running

It sounds like you may have an exhaust leak if the motor is loud and, as for the oil leaking, you may have to get under the car and inspect where it's coming from. The leak may be caused by...

Prius won't turn on, go into drive or reverse.

Load test the smaller 12 volt battery, that is located in the rear right trunk area. Of course, be sure that 12 volt battery is properly connected, too, as it might have been disabled during the high voltage battery replacement....

My Mitsubishi Lancer 2005 has a limp mode issue - the car does not erase trouble codes permanently (even by debugging or terminal disconnection)

I see the note where you have previously replaced several components on the transmission already. Do you recall the brand and warranty of these components? If the parts you replaced are still under warranty, you may be able to get...

Problem with a wheel bearing.

A mechanic will have to check to see if you have a wheel bearing that is noisy when they test drive the vehicle. You are not specifying the front or rear bearing noises. The front is part of the front...

2010 impala Car shakes when I'm on a stop sign or red light on drive or reverse but not on park or neutral what's the problem?

Hi Alejandro. Thanks for contacting us today. Sometimes when you experience this type of vibration as you've described, it's caused by a damaged input shaft or other components inside the differential. This could also be a loose or damaged engine/transmission...

Related articles

The Best Used Cars to Buy If You’re an Athletic Coach
If If you are an athletic coach, you need a used vehicle with tons of room to transport gear. Once in awhile, you may have to take a player or two along with you as well. What this means is...
How a Modern Engine Works
You You turn your key in the ignition, and the engine fires up. You press the gas and the car moves forward. You take the key out and the engine turns off. That’s how your engine works, right? It's a...
How Long Does a Radiator Last?
Your Your car’s coolant system is vital to ensure that the engine stays within operating temperature limits and does not overheat. It’s comprised of several different components. The radiator is the largest, but there are others, including the upper and...