Removal and Replacement
Replacing the oil pump / front crankshaft seal
Special tools:
999 5433 COUNTERHOLD 999 5433 Counterhold
999 5455 PUNCH 999 5455 Punch
Note! If oil pressure is low or a fault in the oil pump is suspected: Measure the oil pressure. Checking oil pressure, B5234T9, B5244T7 Checking Oil Pressure applies to the X70.
Removing timing belt
Remove:
- spark plugs cover
- two fuel line clamps
- lift expansion tank and place on the engine
- front timing cover
- auxiliaries belt
Position camshafts/crankshaft according to marking
Remove right front wheel and slacken off fender liner a little.
Remove vibration damper protective panel.
The camshaft pulleys should rotate until all the markings correspond.
Removing timing belt
Remove tensioner damping unit upper screw.
Slacken off the lower screw.
Turn the tensioner damping unit so that the tension pulley comes free.
Remove:
- the lower screw
- tensioner damping unit
- upper timing cover
- timing belt
Remove the vibration damper
Remove the cover plate.
Remove the vibration damper. Use counterhold 999 5433 COUNTERHOLD 999 5433 Counterhold.
Remove the crankshaft belt pulley
Use a universal puller and two of the vibration damper screws.
Tighten the two screws by hand until they come into contact with the pulley.
Install the puller, so that the claws are on the screws (not on the camshaft pulley).
Caution! Ensure that the tool claws do not damage the pulley teeth.
When replacing the front oil pump seal only
Remove the old seal. Using a groove-cut chisel.
Clean the mating surface.
Install a new seal. Use tool 999 5455 PUNCH 999 5455 Punch. Grease the seal.
Press in the seal using the crankshaft center nut.
Remove the oil pump
Remove four oil pump screws.
Carefully pry out the oil pump. Use a groove-cut chisel with stop lugs to loosen the oil pump.
Clean the gasket face and the mating surfaces.
Disassemble the oil pump
Clean and check all components
Check for damage and wear. In particular check the half-moon shaped insert (the surface between the suction and pressure sides). If faulty replace the pump completely.
There are separate components in the relief valve.
Test the relief valves springs
Position the pump wheel in the housing. Check the clearance and play
Put the large pump wheel in with the marking upwards.
Put in the small pump wheel.
Check the clearance / play. If there is too much clearance / play replace pump assembly. Assemble the pump
Caution! Replace the oil pump if the measured clearance between the outer surfaces and the oil pump housing is greater than 0.35 mm and the oil pressure is below 1 bar at an oil temperature of 100°C. Measure play using feeler gauge.
Install the oil pump
Use a new gasket.
Use tool 999 5455 PUNCH 999 5455 Punch when installing the pump. Use the screws as guides.
Tighten the oil pump using the crankshaft center nut.
Tighten the screws crosswise. Tighten to 10 Nm .
Install the crankshaft belt pulley. Use the center nut and a spacer.
Install the timing belt
Install the screws for the tensioner and damping unit. Tighten to 25 Nm .
Place the belt around the crankshaft and right idler pulley.
Place the belt over the camshaft pulley.
Position the belt around the coolant pump. Press the belt over the tensioner pulley.
Install the vibration damper
Remove the lock pin from the tensioner damping unit.
Install the vibration damper.
Tighten the center nut. Tighten to 180 Nm .
Use counterhold 999 5433 COUNTERHOLD 999 5433 Counterhold.
Remove the counterhold ( 999 5433 COUNTERHOLD 999 5433 Counterhold ). Tighten the screws. Tighten to 25 Nm . Angle-tighten 30° .
Install the upper timing cover.
Turn the crankshaft two revolutions. Check that the markings on the crankshaft and camshaft timing gear pulley align.
Install the cover plate over the spark plugs.
Install:
- the splashguard by the vibration damper and timing cover
- the auxiliaries belt
- the two mounting brackets for the fuel lines
- the expansion tank
- the fender liner and wheel.
Test drive the engine.