Skip the auto shop - Our mechanics make house calls

Q: Engine Burning Oil

asked by on

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?

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

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: Power steering pump

This suggests your power steering pump may be failing or you have a leak elsewhere in one of the power steering lines. The power steering system operates on very high pressurized hydraulic pressure (in some cases as much as 300...

Q: Changed the oil and now there's a tick coming from my engine

Hello, thank you for writing in. Cost commonly the issues with ticking noises in the engine stem from the valves and lifters that control the intake and exhaust flow through the engine. The engine oil lubricates and supports all of...

Q: Does head gasket sealant work? 2003 Toyota Matrix

Hello - the use of "sealing" products is a bit of a religious discussion. Some swear by them, others swear at them. Yes, they will sometimes seal a small leak, although head gaskets are less likely to stay sealed due...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...