Engine distributors WSG-1068 - Oil Pressure Test

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WSG-1068 GENERAL INFORMATION
11. Instruct the customer to run engine as usual and
perform the following:
 Check the oil level regularly at intervals of
3 to 3-1/2 hours.
 Return to the service point when the oil level
drops below the lower (ADD) mark on the oil
level dipstick.
 Add only full quarts of the same oil in an
emergency. Note the mileage at which the
oil is added.
12. Check the oil level under the same conditions
and at the same location as in Steps 7-9.
 Measure the distance from the oil level to
the UPPER mark on the oil level dipstick
and record.
 Measure the distance between the two
scribe marks and record.
 Divide the first measurement by the second.
 Divide the hours run during the oil test by
the result. This quantity is the approximate
oil consumption rate in hours per quart.
13. If the oil consumption rate is unacceptable,
proceed to next step.
14. Check the positive crankcase ventilation (PCV)
system. Make sure the system is not plugged.
15. Check for plugged oil drain-back holes in the
cylinder heads and cylinder blocks.
16. If the condition still exists after performing the
above steps, proceed to next step.
17. Perform a cylinder compression test or perform
a cylinder leak detection test with Engine
Cylinder Leak Detection/Air Pressurization Kit.
This can help determine the source of oil
consumption such as valves, piston rings or
other areas.
NOTE: After determining if worn parts should be
replaced, make sure correct replacement parts are used.
18. Check valve guides for excessive guide
clearances. REPLACE all valve stem seals after
verifying valve guide clearance.
19. Worn or damaged internal engine components
can cause excessive oil consumption. Small
deposits of oil on the tips of spark plugs can be
a clue to internal oil consumption. If internal oil
consumption still persists, proceed as follows:
 Remove the engine from the vehicle and
place it on an engine work stand.
 Remove the intake manifolds, cylinder
heads, oil pan and oil pump.Check
piston ring clearance, ring gap and ring
orientation. Repair as required.
 Check for excessive bearing clearance.
Repair as required.
20. Perform the oil consumption test to confirm the
oil consumption concern has been resolved.
Oil Pressure Test
1. Disconnect and remove the oil pressure sensor
from the engine.
2. Connect the Engine Oil Pressure Gauge and
Transmission Test Adapter to the oil pressure
sender oil gallery port.
3. Run the engine until normal operating
temperature is reached.
4. Run the engine at 3000 rpm and record the
gauge reading.
5. The oil pressure should be within specifications.
6. If the pressure is not within specification, check
the following possible sources:
 insufficient oil
 oil leakage
 worn or damaged oil pump
 oil pump screen cover and tube
 excessive main bearing clearance
 excessive connecting rod bearing
clearance