Models Affected:
Mitsubishi Outlander ZK, ZJ
Mitsubishi ASX
Engines: 4J11 (2.0L) and 4J12 (2.4L)
Recently a customer’s vehicle presented with zero compression on cylinder two, good compression on all other cylinders, and the engine timing was still spot on. The engine dropped cylinder two while cruising at 60km/h and under no unusual load or strain.
We removed the valve cover and the VVL (Variable Valve Lift) valve train unit and found a piece of a pin connecting the main rocker unit to the variable lift eccentric shaft failed.
We also noted two other cylinders the same pins were working their way out, and failure wasn’t too far away on these cylinders as well.
With this pin boss broken and the pin disengaged from the eccentric shaft, the inlet valves are getting zero lift and not opening, resulting in the engine unable to build any compression in that cylinder.
A complete replacement VVL unit and camshaft was fitted, tappet clearances set (which is not as easy as it sounds).
If you have a similar issues with Mitsubishi outlander compression issues, call Southside Cylinder Heads for service and advice on 07 33435899. Brisbane, Logan, Gold Coast and all of Queensland. Genuine replacement units are available Here.
