Skip the auto shop - Our mechanics make house calls

Q: I am losing compression, why?

asked by on

I am losing compression, why?

A: Hi there, thanks for writing in. Dwindling ...

Hi there, thanks for writing in. Dwindling and/or uneven engine cylinder compression is due to valve defects and/or cylinder ring wear. Additional causes are head gasket defects and there is also the possibility that your timing chain has skipped, thus causing the valves to be "open" at the wrong time. All of these possibilities can be checked by a local expert to diagnose the loss of power and advise you on proper repairs.

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: Is it bad to over-fill engine oil?

Yes it is bad. Engines are made for a certain amount of oil. If you put too much oil, it takes up space that wasn't taken up before and can cause compression problems that can blow seals out. You'd want...

Q: Hello so I replaced the engine on my 2005 ford excape and when it was all put back together the clutch didn't work so I took it ap

If you had the flywheel resurfaced, then you may have the bolts that hold the pressure plate on bottoming out and need to put lock washers on each bolt. If not then reset the clutch pedal auto adjuster on the...

Q: Motor Mount

Motor mounts will allow the motor to move too much when accelerating. If you feel motor move when you give it gas and may hear clunk. The motor mounts should be checked. If engine runs rough it may be something...

Related articles

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.