Q: Dead cylinder

asked by on

There is a dead cylinder, a valve is not closing, and there is low compression on the other head.

If there is a stuck exhaust valve, that head needs to come off for a closer inspection. I would look into the low compression on the other head first. Perform a compression test, but also a leak-down test; you want to know why the compression is low before removing the head. If the issue is with a piston ring, or cylinder wall, you’ll want to remove the engine for replacement or repair. If it is also head-related, then remove both heads for inspection. If you would like to have this repaired, consider YourMechanic - our mechanics provide diagnostics at your home or office.

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. Dead cylinder

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: 2008 Crown Victoria police intercepted forward gears slipping but reverse works perfectly?

It is possible that some internal damage may have occurred on your transmission. I would recommend having the major components of your transmission inspected by a qualified transmission specialist to determine the exact cause of this issue.

Q: Truck cranking, but not starting.

To see why this truck will not start you will need to see if it has lost spark or fuel. You have replaced most of the ignition system except the ignition module was not mentioned. This would cover the ignition...

Q: The check engine light always seems to come on when my gas tank is half full. 1998 Honda Accord

Hello - the first task here is to capture the problem codes turning on the Check Engine light. Most auto parts stores will do this for free - on a time-available basis. It is probably worth checking for problem codes...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...