Skip the auto shop - Our mechanics make house calls

Q: Blown head gasket or timing chain?

asked by on

My truck suddenly overheated on my way to work, blowing steam and stopped running. After letting it sit for a while I was able to get it to turn over, but it takes standing on the gas pedal to keep it going. I had a compression test done and have 60 on the high end and 40 on the low, along with blowing air into my radiator (it sounds like it's percolating). Unfortunately, the mechanic shops I've talked to want the guarantee that I'm going to get the work done with them before giving me a definitive answer and have been very unhelpful. I've done some research and found that it could be a blown head gasket or timing chain issue. Is there some way that I can differentiate and pinpoint the issue before I do the repairs?

My car has 187000 miles.
My car has a manual transmission.

Hello. This is definitely an internal engine problem. When it gets hot the cylinder head fails and this occurs. It can even be a cracked head or block in some serious cases. Either way, the timing chain should be replaced at the same time that the work is done. The engine will need to be disassembled to be able to verify what repair it will need. This will not be caused by just the timing belt. If you’d like to have a professional check this out, a certified technician from YourMechanic can come to the location of your car to inspect your overheating issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: My Toyota Camry 2012 LE the passenger site airbag stay off what should I do?

Hello, thank you for writing in. The passenger side airbags are activated by the switch beneath the seat. It is weight sensitive, and only activates when there is over 50 lbs sitting in the seat. If the air bag is...

Q: Not getting enough fuel car will not run right. It stalls when you give it gas and stalls when it's running. It's a 1984 Ford Escort.

Hi there, thanks for writing in. Several early 80's Ford's swapped from carburetor to fuel injected engines; including your '84 Ford Escort. However, there were two different fuel systems available that year. If your Escort has the fuel injected engine,...

Q: Toyota starts then shuts off when cold

Your truck has two devices to assist cold starts. The cold start valve is an extra injector that sprays fuel into the in take for about a second when you are cranking the engine below about 45 degrees. The other...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.