Working on the chain gang
Mistubishi reports that certain instructions were missing from the repair manuals regarding timing chain inspection for the 2010 Lancer, Lancer Sportback and Lancer Evolution. Affected service manuals include 2010 Lancer, page 11C-17, Lancer Sportback, page 11A-18 and Lancer Evolution, page 11A-17.
TIMING CHAIN ELONGATION VISUAL CHECK
NOTE: When the timing chain elongates more than the specified length, the DTC P0012 (variable valve timing advanced-angle value abnormal) is set. Unless the code P0012 is set, the visual check is unnecessary.
THE MISSING INFORMATION:
After the DTCs P0016 (crankshaft/camshaft intake position sensor phase problem) and P0017 (crankshaft/camshaft exhaust position sensor phase problem) are repaired, it is necessary to delete the learning value of the timing chain elongation. At that time, perform the visual check.
NOTE: Unless the work using scan tool MB991958 is correctly carried out due to the malfunction of the ECM, carry out the check whether or not the DTC exists.
- Storing the learning value regarding the amount of timing chain elongation before ECM replacement.
- Writing the learning value into the new ECM after ECM replacement.
- Remove the ignition coils.
- Remove the cylinder head cover.
- Remove the upper chain guide.
CAUTION: Always rotate the crankshaft clockwise.
- Rotating the crankshaft clockwise, align the timing mark of the camshaft sprocket with the point on the upper plane of the cylinder head. As a result of this, the No. 1 cylinder is positioned at the compression TDC.
- Look at the inside of the timing chain case with one eye in the direction of the arrow. Fix the eye line at the point where the top axis line of the chain elongation indicator at the front side of the timing chain case is overlapped with that of the chain elongation indicator at the reverse side of the timing chain case.