Problems With a 405KVA CKD SKODA Diesel Generator Set

One of the possibilities is that the oil is warming up while the engine runs. Viscosity reduces with temperature.

Is 0.2mpa a 'fault' or 'warning' condition? If not, then don't worry about it.

i think that as the block fully warms up, a larger gap exists in bearings, or even clinder head to block in area of oil pass thru. [ecessive heat will warp cyl head, Or if cam bearings wern't repl. in last overhaul [common] there are sometimes oil presure relief valve issues, check that first

also, and addtl'y if oil is too hot, try an oil cooler ..along with single grade hi-viscosity oil ( up to 70 wt.) by that time youre almost certain some major mechanical wear is present. you may soon need an overhaul since that pressure, at norm. speed and load is abnormal, usually signalling engine wear/damage.

when overhauling, closely examine thrust bearings/ spacers etc. you need to know exact cause of premature wear factors, ive seen engines with improper clearance in thrust area.. after 50% wear on engine.. no oil pressure, thus only 50% use.

J Bo

J Bo

Worn engine most likely.

Check the crankcase vacuum whilst running by carefully removing the oil dipstick. Oil may blow out in splatters. This indicates a positive pressure. Should be a negative reading if you make op a simple u tube manometer from clear plastic tube about 600mm long part fill with water hold in a "U" shape and fit one end to dipstick hole. Should be 15 to 40 mm suction.

Wear can be from all sorts of things but most likely the cause of falling L O P.

(This a good test for any engine. Remove the oil filler cap and the vacuum will go)

Hold on everyone !!! This is a normal pressure drop from heat as pointed out above by another post. This is plenty of pressure. Alarm will be half this value (.1 mpa) and shutdown 10% below the alarm. BTW, for a turbocharged diesel engine the crankcase pressure is slightly positive by 1-2 inches of water; normal.

George

I agree with PetroPower. There just isn't anyplace else for the oil to go to. Assuming that supply is well-regulated, there doesn't appear to be too much cause for alarm. If you are concerned (noises, excess heat, engine strain), open it up (eg one cylinder, crankcase) and do a quick engine check the next time you stop running, including the condition of the splines on the regulator.

Mark

Here i had mentioned some points, i think fst u check that definetly cause will be from tht only....

*THE ENGINE RUNNING ON OVERLOAD.

* THE OIL IS GOING TO CHANGE ITS PROPERTIES.

* ONCE AGAIN CHECK OIL PUMP * CHECK PRESSURE REGULATOR VALVE * CHECK L.O.FILTER. * Check the pressure gauge & related piping....

Hi, Guest:

Well, assuming you have done your homework as well as you can with the information you have, it's time to grit your teeth and go for for the final resort :

What does the manufacturer think is causing the drop in pressure?

Mark