Looking for a oil line check valve for my zuma 50 it s smoking think it might be this or crank shaft oil seal burning to much oil

burning oil, worn piston ring, bad valve seals. if its smoking bad it should have a check engine light on. check codes that will tell you the problem.

pcv valves allow oil fumes to be burnt through the motor so the smoke would unlikely to coming out from under the hood.. To get you problem there has to be raw oil moving onto a hot surface such as an exhaust pipe. Check all obvious oil leak points such as front crank shaft seal behind harmonic balancer. check transmission oil cooler lines if fitted. check rocker cover gaskets as they can leak small amounts of oil directly onto the exhaust manifold mostly from the rear of the head. check for oil leaks at the rear main seal at the mounting cover. finally if the pcv valve is faulty then excess ive crancase pressure would have pushed the sump gasket9 or both front and rear seals) out of place and the oil again would be getting to the exhaust pipe.You say you have just had an oil change done check to see that the sump is not over full

Dear Sir,
Here is the oil leaking Problem Identifying Technique

Engine oil leaks from the valve cover gasket are common.

The intake manifold plenum gasket may leak and cause increased oil consumption/burning and a spark knock during acceleration; the gasket should be replaced.

External oil leaks from valve cover gaskets, intake gaskets (front or rear), and the rear crankshaft (rear main) seal area are common. The rear main seal is an unlikely source. Normally, the bearing cap mating surfaces (as well as the sealing surface between the oil pan and bearing cap) are the source for the leaks.

Engine oil leaks at the distributor can be misdiagnosed as leaks from theintake manifold seal, oil pan gasket, or rear crankshaft (rear main) seal. A revised distributor is available if oil is found inside the distributor.

If the oil filter casing shows signs of distortion from excessive oil pressure, theoil pump should be replaced.

Often misdiagnosed as a leaking oil filter gasket, the oil filter adapter can seep from between the adapter and engine block.

Carbon buildup on the top of the piston is common. As the buildup increases with mileage and over time, symptoms may vary from light ticking, to ticking/hammering, to hammering/knocking noises. Fuel injector cleaner often solves the problem.

I think it helps to analyse u r Problem

start with seal valve but try do this Replace your engine oil to 20/50 synthetic Valvoline .and add oil stop smoke . i hop for you the best .

I think, the bearing of the A/C unit jam and putting extra load on the engine or the belt that connects to the engine has dried out. Logically, A/C has no direct connection with the engine exhaust.

I suspect an internal engine issue such as a valve, the white smoke was oil and it could mean a bent, burned valve or damaged valve seat causing the valve stem seal to leak allowing the engine to **** some oil and burn it (the white smoke) and now you lack compression. It is less likely but possible the oil was overfilled and you "lipped" the piston which causes the compression to drop. check the compression, 100-120 is normal, less than that means bad internal parts.

May mean yor engine is burning the oil or you have a leak.
Look in coolant recovery tank or radiator when vehicle is cold and is if coolant is milky or there is oil in it.If either of these conditions are there you may have a bad head gasket.
If none of these conditions are there then have the vehicle inspected for oil leaks.
Arears to focus on: Rear main seal,oil pan,valve cover gaskets, cam and crank shaft seals, oil pump seal and gasket.
Good luck

blue smoke is oil possible worn or damaged component in head-usual problem is valve seal or worn valve guides -pull and inspect the spark plugs look for which one[s] is fouled or oil soaked that will narrow down where ur problem is

I have toyota corona 3s engine it smokes black and fuel consuption is high we have changed the engine oil and cylinderhead gassecate but still black smoke is comming what should i do