anyone ever read this before?
THE best info i have found on oil squirters.
Caution On Piston Cooling Oil Jets For
1990-98 Chrysler/Mitsubishi 2.0L 4G63 Engines
The AERA Technical Committee offers the following caution on piston cooling oil jets for 1990-98 Chrysler/Mitsubishi 2.0L 4G63 engines. These jets must be removed, cleaned (or renewed) and re-installed anytime the cylinder block is disassembled for reuse. There are two different jets used depending on the year of engine manufacture.
These engines use an oil jet to cool piston temperatures to prevent piston over heating. The oil jets use pressurized engine oil to spray the underside of each piston to reduce and stabilize the piston crown temperature. These oil jets are located in four of the main webs and share oil with the main bearing. The second design oil jets are very small and often over-looked as they're somewhat hidden (See Figure 1). Those engines were manufactured beginning in 1995 and use a pressed in jet. Older built 1989-94 engines use a bolt in" assembly as shown in Figure 4.
To remove the second design oil jet, obtain the proper size drift or punch and use a small hammer to tap the oil jet out of the block. Drive the jet down and out from the top of the block or the deck surface side being careful not to damage the cylinder walls during this process. (See Figure 2) Never reuse this style oil jet. Installation of the new style oil jet, Part #MD1 09259, can be accomplished by obtaining a drift or pin punch with a .150-.200" (3.81-508 MM) diameter. Then, use a small hammer and tap the oil jet in from the crank main journal side until the oil jet bottoms out (See Figure 3).
To install the original first style bolt in" jet, Part #MD329806, assure it is clean and place it in the cleaned block and torque the mounting bolt to 22-25 ft/lbs.
reported blocks that were brought into their shop that have suffered a thrust failure before and right after rebuild. Some rebuilds were also previously cleaned using a thermal cleaning process. It has been suggested that possibly the small spring had become annealed in the cleaning process or grit was in the oil jet holding it open which reduces the amount of oil available for the thrust bearing face.
The AERA Technical Committee
it is a 2.0, but read this all. they actually test the squirtrs to see the pressure it takes to open them. they state that the factory spec is around 25 psi they will open, but when tested some actually opened early like 14 psi or less, and that was causeing a loss of pressure on the crank and rod bearings on a 2nd gen 2.0 engines, ( CRANK WALK ISSUES)