- radial clearance, especially in the direction of the cylinder axis
- clearance according to the direction of rotation with the connecting rod in quadrature
YES go to 16 NO go to 17
15 - Replace damaged components.
16- Proceed with engine service operations.
17 - Open the engine crankcase and remove the oil pump as described in the "Crankcase and crank-
shaft" chapter.
- Check the oil pump as described in the following pages.
- Check that the cooling nozzle and the timing system feeding jet are properly installed.
- Visually inspect the crankshaft couplings and their sizes as per the «Specifications Chapter».
N.B.
POTENTIAL IRREGULARITIES IN COUPLINGS AND THE TIMING SYSTEM COMPONENTS CAN-
NOT BE DETECTED WHEN INSPECTING THE LUBRICATION PRESSURE. THEY MAY BECOME
EVIDENT BY AN INCREASE IN NOISE.
N.B.
IN CASE OF IRREGULAR PRESSURE ON THE CRANKCASE, CARRY OUT A VISUAL AND DI-
MENSIONAL INSPECTION OF THE TIMING SYSTEM COMPONENTS (SEE "THERMAL GROUP
AND TIMING SYSTEM" CHAPTER).
Oil pressure check
1 - In case of oil or oil filter leaks, check the lubrication pressure.
AHEAD go to 2
2 - Install the special tool.
Specific tooling
020193Y Oil pressure gauge
020434Y Oil pressure control fitting
AHEAD go to 3
3 - Check the system pressure with cold engine and medium - high speed.
Standard pressure < 6 bar
YES go to 4 NO go to 5
4 - Replace the damaged components.
5 - Check the working order of the adjustment by-pass (see "flywheel cover" chapter) and restore proper
sliding.
N.B.
STANDARD PRESSURES ARE OBTAINED USING OIL WITH THE PRESCRIBED VISCOSITY. A
HIGHER VISCOSITY CAUSES AN INCREASE OF THE SYSTEM PRESSURE.
1 - If oil consumption is above 250 g/1000 km on a run-in engine, proceed as follows.
AHEAD go to 2
2 - Check the presence of oil at the scavenge duct on the filter box.
YES go to 3 NO go to 4
3 - Check the one-way reed valve and the decantation chamber drainage hole.
Engine GP 800 i.e.
ENG - 86
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