| Mitsubishi Engine >> BURNED JET VALVES |
Burned Jet Valves On
Chrysler (Mitsubishi) 2.6L Engines
The AERA Technical Committee offers the following consideration for Chrysler 2.6L engines with repeated jet valve burning problems. This problem is most prevalent with engines that utilize hydraulic lash compensators (HLC). Reported failures have usually been shortly after cylinder head installation or
compensators replacement.
Unless the jet valves are readjusted after the engine has reached operating temperature, improper clearances will result. The correct lash adjustment of .010 (.254mm) can only be achieved of the HLC plunger is in its operating location. If the jet valve is adjusted before that point, or on the bench, operating oil pressure will change the previous clearance. Insufficient clearance may hold the jet valve off the seat and eventually burn it.
The AERA Technical Committee
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