Air filter soaked with oil and head gaskets replaced

There are three common reasons for oil on the plugs. A blown head gasket, worn valve stem oil seals and worn piston rings. The most likely reason will probably be the head gasket.
Check the coolant overflow tank for oil floating on top of the coolant. This is a sign of a blown head gasket.
For Valve stem oil seals check the following... On a Cold start you get a large thick cloud of blue coloured exhaust smoke. You also get the same smoke when going from idle to higher engine revs. Such as pulling away from a red traffic light after sitting waiting for traffic.
Does the vehicle use a lot of oil? Does it have excessively smoky exhaust gas, usually more of a grey/white colour, when driving? Has it lost power? Look in the engine air filter box. Is there oil? Worn piston rings sometimes cause 'blow back' where an oil/air vapour is forced back through the air intake into the air filter box.

There is a breather valve mounted between the cylinders. Sounds like it is stuck

cracked block. once it heats up the crack gets bigger and the oil gets thinner which makes more oil burn. run car without the oil cap on and see if lots of air/ oil comes out if so thats blow by and you need a new engine.

One of the problems could be an internal leakage in the engine, meaning one of the seals or gaskets are bad which are allowing the oil to make it through the intake up the air chamber through the throttle and into the air filter. Could be a blown head gasket most likely, need a bit more infromation about the car to truly be sure.

hI you have bad rIng posten add 2 oIl stop smok and new spark and oIl 20/50 thIs shuld help you .

ENGINE SMOKES BLUE THE ENGINE BURNING OIL DUE TO WORN PISTON RINGS , WORN VALVE GUIDES AND SEAL./ ENGINE SMOKE BLACK ENGINE GETTING RICH FUEL MIXTURE CAUSED BY DIRTY AIR FILTER, WEAK IGNITION SPARK, FAULTY FUEL PRESSURE REGULATOR OR LEAKING FUEL INJECTOR, EVAP CANISTER GAS SOAKED./ ENGINE SMOKING WHITE ENGINE BURNING ANTIFREEZE DUE LEAKING INTAKE GASKET OR BLOWN HEAD GASKET. IF ENGINE HAS A LIGHT WHITE BLUE SMOKE ENGINE BURNING TRANSMISSION FLUID DUE TO A RUPTURE VACUUM MODULATOR DIAPHRAM ON TRANSMISSION.

if unit is ohv engine - i gather unit is using oil ?

may have a blown head gasket and air filter may be oil / petrol soaked
restrcting air flow

check oil level is correct ( and does not smell of petrol ) wet sumped and breather is working ( not stuck closed )

check for tight valve clearance

if all these are ok then might suspect worn rings / bore ?


may need further info on engine model - type

let me know and i will try help more if can

cheers

sounds like a blown head gasket

unless the ground was a steep slope while mowing or the mower was tipped over 35 degrees or more in any direction except with the handle bars down (spark plug up is ok), it will most likley be a blown head gasket between the pushrod gallery and cylinder. remove the head and get it re-faced then assembly with new gasket. valve adjustments are 4 thou inlet and 6 thou exhaust

sounds like you have a blown head gasket....pull spark plug and check for oil on plugs....thats your bad head gasket