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I can't see one on the plastic ones. On the metal ones, there appears to be a small hole on what would be the top screw facing upwards. The metal ones do have what looks like a couple small holes underneath in the oil channel, but not sure where one goes. The other looks like it exits out on the top end.
Last edited by ShirBlackspots; Jun 29, 2019 at 03:34 PM.
but I can't tell if that spot above the top bolt is a hole or not. I actually 'thought' all the chain oiling came from the phaser - which has several layers sandwiched together without gaskets. Looks like they would basically leak a little all the way around and sling oil out toward the gear teeth on both sides.
Because of 'gravity' and the tensioners located above / below chains on "L" / "R", the tensioner doesn't seem to be the optimum point for oiling chains. ??? I dunno.
I don't have a picture from that angle, and I won't be home until July 7th. But for what its worth, that picture I posted is of the right side tensioner.
...but I can't tell if that spot above the top bolt is a hole or not. I actually 'thought' all the chain oiling came from the phaser - which has several layers sandwiched together without gaskets. Looks like they would basically leak a little all the way around and sling oil out toward the gear teeth on both sides.
Because of 'gravity' and the tensioners located above / below chains on "L" / "R", the tensioner doesn't seem to be the optimum point for oiling chains. ??? I dunno.
That hole is precisely where I have a large amount of oil spraying from my plastic tensioners. Is sprays directly on the chain basically right below the phaser. It is certainly sufficient to lube the chain. Whatever gets slung off the phaser would wind up on the valve cover dripping back down...
I'm just not sure if it's by design or not.
Replaced left phaser yesterday. Situation is improved in the aspect that the system is able to maintain control of the cam timing until base oil pressure drops down below 25 PSI, but it still is not good...
I think that basically leaves us with an oil control issue to the left bank...
Restriction between head and block? I don't *think* so. Sure is an awful lot of oil in the top end for that...
Pretty solid minus a considerable ignition misfire on #2... New phaser is a dramatic improvement; it didn't start to act up until oil temps were >205°. I estimate this would put the idle oil pressure around 20psi
While it isn't perfect, it is at least driveable while I ponder my options...
What about running some Marvel Mystery Oil in the engine (Do so for maybe 50 miles)? On the bottle, it says to replace 20% of the engine oil with MMO, which for our trucks would be 1.4 quarts (which is 1.4 bottles) MMO will clear up sludge and varnish, and might clear up oil passages
What about running some Marvel Mystery Oil in the engine (Do so for maybe 50 miles)? On the bottle, it says to replace 20% of the engine oil with MMO, which for our trucks would be 1.4 quarts (which is 1.4 bottles) MMO will clear up sludge and varnish, and might clear up oil passages
I *really* don't want to get into an oil/additive discussion... However, this truck has been fed a steady diet of PYB with 5K OCI and several doses of Kreen over the last 130k miles. When I opened it up it was surprisingly clean considering the mileage. While it is possible, I don't really suspect a sludge issue. But, I guess I really don't have much to lose at this point... maybe I'll give it a shot.
