DeVille V8-4.6L VIN Y (1998)
42.
Maintain the RPM at 2000 for 1-3 minutes. Then promptly road test the vehicle for a minimum of 20 minutes in the third gear range. Include
several short, wide open throttle bursts.
43.
After the road test, allow the engine to idle for one minute with the A/C off and the gear selector in the PARK position.
44.
Connect the Tech 2(R) and inspect and clear any codes from the road test. An EGR pintle code may set from debris binding the valve. Clean the
EGR valve, if necessary.
45.
Turn the ignition to Off. Disconnect the Tech 2(R).
46.
Change the engine oil and filter.
47.
Verify the oil level.
48.
Reset the Engine Oil Life monitor.
Important:
It is not necessary to deglaze the cylinder walls when installing the new rings. The new rings can be installed in the cylinder bore as they are.
The bores should be inspected for any cracks or damage before reassembly.
If the post oil consumption test results for a 2000 to 2003 vehicle indicate the oil economy is still less than 0.946L (1 qt) in 3200 km (2000 mi)
on vehicles still in the warranty period, then the piston rings should be replaced. The new part number for the piston rings is 89017413. Be
sure to install the second compression ring notch side down. Rings with the increased tension and other improvements are now available for
the 1996 to 1999 vehicles. That ring package is P/N 89017431.
Important:
There is a new head bolt torque angle specification that should be used when installing the head bolts. The new spec is 175 degrees total torque
angle (the previous specification was 190 total degrees). The 15 degree reduction should be subtracted from the final pass. The final pass
would be 45 degrees instead of 60 degrees. This new specification will reduce the possibility of head bolt thread damage and localized
stresses, but still provide the necessary clamp load.
