Skip the auto shop - Our mechanics make house calls

Q: Smoking a lot and oil in the intake manifold

asked by on

I have a 203 jeep liberty 3'7 it has a lot of blue smoke when driving ..I thought bad rings or head gasket but when I tore it down i found a lot of oil in the manifold intake and oil around where the gasket where the manifold connects to the heads. what could this be?

Thank you for your question about your 2003 Jeep Liberty. An oily, water vapor laden mist continuously flows from the engine’s PCV valve to the intake. In some engines, a significant amount of the oil vapors will condense back into liquid once that vapor hits the relatively cold surfaces of the intake. In part, that is what you are observing. It is probably pure coincidence and has nothing to do with the oil burning you have also observed.

Replacing your valve stem oil seals should resolve, or at least lessen, the amount of oil getting into the combustion chambers. Although prior to doing that, just to be sure you don’t need to tear down the engine, perform a compression test on the cylinders to make sure the rings and valves are sealing. If compression is low or uneven, that’s not a good sign.

If you do have good compression and want to replace the valve stem oil seals, YourMechanic is ready to assist. One of our mobile technicians can come to you to perform these checks and properly diagnose the smoke and oil leak firsthand for an accurate repair.

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: I have grinding in the rear

From what you've described, you'll need to have the rear brakes checked to see if the brakes are good. The problem may be normal metallic brake dust that's getting on the rim and tire or your rear brakes could possibly...

Q: What type of oil to use and should I change the type of fuel?

Hello and thank you for your question. You can go from conventional oil to full synthetic oil on vehicles from 1996 and newer. That will not hurt the engine. Just make sure that you run the engine for about 500...

Q: I was driving my truck and it made this "poof" sound as if something blew. I lost everything--brakes, power steering, and it stalled

Hi, thanks for writing in. It is possible that the "poof" and exhaust smell (rotten gas smell?) both originated from the catalytic converter, and sulfur deposits in the converter. The engine may have backfired through the exhaust, setting off a...

Related articles

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...
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...
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...