Back to the subject of Jeeps...
The new under-piston nozzles arrived during the week so I put them in today. A tiny amount of sealant on the o-rings and a thorough amount on the screw threads. They went in easy but I will examine their operation later.
Found oil galley end plugs at NAPA. They searched under Make and Model but had nothing listed. Searched by the Chrysler part number (05066837AA) but also came up blank. However, searching by Freeze Plug size, or Oil Galley Plug size they found the right part. Size of the oil galley plug is 0.472" diameter and the part number at NAPA is 3813193. Oddly enough the receipt showed 2005 Jeep Liberty 2.8L 171 CID L4 DOHC as the description. They cost $0.99 each. The machinist had removed 4 so I bought 4.
Started my progression of cleaning by pumping diesel through the lubrication system and back into the pan. The pan drains back into the 5-gallon bucket with the original diesel. The first pass last week made the diesel jet black; this week the diesel came out mostly clean. Here is what the oil galley looks like without the plug installed.
Started pumping then installed the first one where the diesel ran out first -- front right surface. A dose of Permatex gasket sealer, then tap it in flush. Seated it further in with a 8mm socket and extension.
Next leaking spot was the back end of that galley so plugged it.
I expected the next place to leak would be the left side front but it never arrived. Hmmm. There are two oil galleys running longitudinally on both sides that provide oil to the hydraulic lash adjusters. Right side is getting cleaning diesel flow, left side not.
There is one lateral oil galley that I thought connected the two longitudinal galleys so I removed the plug. It was way too easy. Used a center punch in the center of the plug.
Then used a self-drilling roofing screw and a 14mm socket to drill into the plug and draw it out. It was out before I realize it.
Once removed, I found a very filthy oil galley. This picture does not show the standing grit and gunk I found there.
Attempted to flush it out by pumping diesel again but it still would not come out. Stuck a long drill into the galley and it only went a short distance. Turns out oil comes up from the block further inboard and the lateral galley only connects a vertical galley to the longitudinal galley.
Took the engine top off (cam shaft assembly) and found the problem. With the hydraulic adjusters removed, large passages ways are open along each longitudinal galley to allow all the pressure to spill out.
With the hydraulic lash adjuster installed, then cleaning diesel started pouring out the last galley plug that was removed.
Since I took out the 5th galley plug, I will have to stop at NAPA tomorrow and get another one. Then I'll be able to rotate the crankshaft & oil pump and flush diesel, engine flush and actual oil through the system.
Dean.