Engine - Runs Rough/MIL ON/Misfire DTC's/Low Power
NO: 21-21DATE: 8-15-2005
MODEL/CHASSIS: See Table Below
M.YEAR: 2004
SUBJECT:
Engine may have a rough idle, DTC ECM misfire codes, rough running or lack of power.
REFERENCE:
VADIS/VIDA
This tech note supersedes the previous 21-21 dated 7-29-05. Please update your files. Update to LABOR OPS - correction is shown with bold text.
Affected Vehicles Table
DESCRIPTION:
The Customer may have a complaint of a rough idle, rough running, lack of power or the MIL on.
SERVICE:
^ Read out DTC's
^ Check compression and do a leak down test with the engine cold.
^ Check valve clearance on the cylinders with low compression.
^ Remove the cylinder head and check the condition of the valve face.
^ If the valve face is worn, replace ALL the intake valves, even if some look okay.
^ Use ONLY intake valves with P/N 30637059.
See list shown for all materials needed.
NOTE:
Machining, grinding or lapping of valve seats or valve sealing surface must not be done.
Do not forget to check and adjust valve clearances for the new valves.
Note:
Valve Lifter Kit contains numerous lifters; Claim submitted should only have individual lifters used for the repair.
Intake valve replacement 1
Note!
Replace all intake valves.
For cylinder head removal and installation, see:
Removal, replacement, installation
Engine
Cylinder head
Cylinder head/gasket, replacing
For valve replacement, see:
Overhaul
Engine
Cylinder head
Cylinder head, assessment/overhaul
Adjust valve play as described in the link:
Valve play, setting/adjusting
Important!
Machining, grinding or lapping of the valve seat or the valve sealing surface must not be performed.
WARRANTY INFORMATION