Q: Engine Burning Oil

asked by on February 12, 2017

I recently had cracked heads replaced on my ford ranger. Now it is burning oil like crazy. Mechanic is clueless why. Says its probably now needs rings. Never burned oil before the head replacement.

My car has 130000 miles.
My car has a manual transmission.

If the engine did not have excessive oil consumption prior to the repair, the rings are not likely to presently be the cause of excessive oil consumption unless you have somehow ruined the rings "overnight". There are two principal possibilities. One is that the head gasket(s) is leaking. That’s not inconceivable, particularly if the heads and the block were not measured prior to even contemplating installation of a new gasket. Cylinder head gasket replacement requires strict adherence to Factory Service Manual specifications regarding block and head flatness. The latter surfaces must be flat within .002 inches, which is one-half the thickness of a human hair. Also, head bolt replacement and torque sequence, surface preparation (surfaces have to be mirror-like before gasket is applied), and so forth, are all critical. Unless the conditions are perfect, leaks are actually common. That’s why a lot of shops won’t do the work because it takes too much effort and too much time. The second possibility is leaks through the valve guides and/or the valve stem oil seals. Leaks there, of course, would simply occur if the "new" or replacement heads were defective. If you desire that the excessive oil consumption be diagnosed by a certified Mechanic, dispatched by YourMechanic right to your location, please request an oil leak/consumption diagnostic and the responding certified mechanic will identify the root cause of the problem for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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

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

Service advance trac light is on, anything I can do before I take it somewhere? No mechanic experience

Hello, thank you for writing in. The first step is to scan the vehicle for diagnostic codes. You can then use those to help you figure out where to turn your attention. Chances are there has been damage to the...

Shuddering shaking from take off through 1st and 2nd gear. What can cause this? I just bought the car and I'm scared I was ripped.

This is often a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission...

Radiator keeps blowing coolant back into holding tank

Hi, thanks for writing in. This is a sign that you may need to have the radiator system burped. This is a process that is used to relieve the air in the system which can cause the coolant to overflow...

Related articles

2012 Nissan Rogue vs. 2012 Ford Escape: Which One Should I Buy?
Sport Utility Vehicles (SUVs) use the chassis of a truck to provide superior structure, with a larger size and often poor gas mileage. While that isn’t always true, SUVs have a raised ground clearance and are generally meant to haul...
How Serious Is It When a Hose Is Leaking?
A leaking hose in your car could indicate different problems. Some leaking hoses are more serious than others, but all should be checked and repaired.
Top Five Selling Cars in Colorado in 2012
Colorado Colorado offers a varied climate depending on where drivers are located. Those in lower elevations see plenty of sunshine all year, while those in the mountain areas can see as much as 300 inches of snow. Due to this,...