Oil pump seal leaking

You need to remove the front part of the oil pump and reseal it with an oil pump reseal kit from the parts store. Do yourself a favor and put in a new oil pump shaft seal as well. While you are at it change the front crank and the front cam seals, as they are all made from the same type of rubber.

I have toyota emina,diesel engine, i change oil every reaching 5000 kilomters on guage, with 6 liters diesel engine oil.

Usually if outside o rings fail the its often soon after the inside rings and seals go to. injector pump overhaul the solution. You could just remove the pump and replace the front seal but it would only be a short term fix as the bushings in pump are likly worn

Are you sure have a leak,? you saw it? they usually don't leak only from the valve cover gasket.
If you see oil drip by the passenger side of the oil pan the leak could be the crankshaft seal.
if the oil is in the center of the engine rear main seal is the problem.
If al around the oil pan is wet with oil but the oil do not make it to the floor, then the person who is doing the oil changes is not cleaning properly.

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just slacken off the clip on the highest water pipe to allow steam to escape, topping up the expansion tank as you go.obviously when the engine is hot....

there are very small oil galleries in that engine and the varnish will build up and restrict the flow of oil and it will leak past the valve guides.
do a compression test,and if it is good,the oil is not burning from the rings.,but from the valve guides.the seals need to be changed.

the propshaft. is located under front hood between engine and radiator fan

it's a 4 liter oil

hi im rob r u looseing water white smoke indercates cracked head or blowen cylinder head gasket and the turbo wont provent it from starting turbos r just to give u more power

you could have a broken piston rings