89ARIES wrote:
Also, KCARMAN88 says that 2.5 Chrysler motors are prone to oil pressure failure, compared to 2.2.
Chief wrote:The Chrysler Mitsubishi 2.6L Engine: The SOHC 8-valve 4G54 (also known as the G54B) displaces 2.6 L (2555 cc), with bore x stroke at 91.1 mm x 98.0 mm. Some had heads with additional jet valves to improve emissions. It was designed for longitudinal use in rear-wheel drive and all-wheel drive vehicles. It was equipped with a Hitachi 2-barrel carburetor with a vacuum-operated progressive secondary, except for the turbocharged version and a version used in Australian Mitsubishi Magnas, which used fuel injection. This engine was also used on Chrysler's front-wheel drive K-cars and their derivatives from 1981 until 1987, when it was replaced by Chrysler's 2.5 L engine. This engine was commonly paired with Chrysler's A470 3-speed automatic transmission on Chrysler vehicles.
The 2.6 engines were basically good engines, except for the carb problems, and that could cost you around $400 plus installation; its a computer controlled unit. Do not look to put a used unit on it unless its been rebuilt by a professional who knows what the hell he's doing.
I also found this on a AERA Technical Bulletin:
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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