How can i fix my sump compression - Cars & Trucks

main engine oil pan/sump
so pressure does not mean fuel.
PCV or there vents cogged
cracked piston, rings bad (max)
run a compression test if PCV is ok.

Diesel or petrol?
If it has overheated in diesel too expensive - replace with 2nd hand motor
If petrol sometimes heads warp and can be replaced but pistons may need to be replaced as well.
If camshaft belt breaks it is rare to take out all cylinders, sounds more like severe overheating. if so pistons usually seize then let go but rings remain in grooves letting compression into sump and blows oil out extremities like timing case and rear main seal at gearbox . Can be tested by pouring 25mm of engine oil in cylinder then re-testing compression> if rings compression will increase. If valves the compression will not change. Good luck

not necessarily
the purpose of the PCV valve is to vent the compression gases that by pass the rings into the sump back through the inlet manifold and so have the fumes burnt before going out the exhaust pipe
There fore it stands to reason that if you have worn rings/ broken ring or cylinder scored then there will be excess compression gas to the sump which tends to boil off the oil or actually burn the oil fumes in the sump and this excessive smoke will find its way back into the inlet manifold and if too much ,out the exhaust as smoke
when going up a hill that amounts to extra compression being exerted on the rings and pistons and a larger part of the compression gas into the sump and out the rear as smoke
I suggest that you have a compression test done to gauge the condition of the engine, an oil pressure test done with a mechanical gauge to measure the oil pressure to determine the condition of the bearings as excessive bearing clearance will overload the weak oil rings and that will also cause smoke out the exhaust
you have not mentioned the mileage done by the motor but as it is 2008 model and calculating the average mileage covered for that year vehicle I am thinking that the motor may be a bit worn
however the suggested tests done by an accredited service shop will give fairly good results to determine the next move

clean out the PCV valve and clean out the hoses to and from it

Less power output. Car sluggish. Spark plug oily and need replacing more often. Engine breathing too much. Faulty compression ring will cause too much pressure in the sump. Leading to oil leaks at the sump, and or maybe at the rear and front main oil seals. Oil will also be visible at the air filter housing. Remove dipstick while car is idling. The pressure shoul be low. If too much fumes is visible. You might have failed compression rings. Valve stem seals or worn valve guides

There are at least three possible reasons for no psi in cyl No 4.
1. Burnt or damaged exhaust valve in that cylinder
FIX Remove head and replace faulty valve
2. Blown head gasket (water mixed with sump oil shows milky on dipstick and steam or water coming out of exhaust tailpipe, radiator water disappears )
FIX Remove head, grind flat and assemble with new gasket.
3. Broken piston rings, or cracked piston or burnt hole in piston.
FIX replace faulty parts.
Squirt some sump oil ( 2 or 3 spoonfuls ) through spark plug hole,
spin motor , and if compression PSI improves then it is rings or piston, if no PSI then it is faulty ex valve !!!

all diesels have a blow by problem because of the high compression and combustion pressures that pushes gasses into the sump of the engine past the ring gaps . have a compression test done to determine the condition of the rings and bores of the engine . Next check the pcv valve is not restricting the flow and building up pressure in the sump and there by blowing oil in the rocker cover out into the intake.. Check the viscosity of the oil you use and ensure that it is correct for your area of operation.

this will most likely be compression gasses from the sump as the pcv valve is not working and relieving the pressure.. The compression gasses come from the combustion process and escapes past the ring gaps into the sump

run the engine for 1000 km so it can run in another thing is did you space your ring gaps correct this is the only reason a new motor will have excesive sump compresion

sound like sump compression. meaning the compression passes the piston into the sump and forcing the oil upward. might be only rings which need replacement or the sleeves needs to be re-bored to fit new oversize pistons.