My fingers are crossed.
Ever since the day I bought this miserable nightmare of a rig, as soon as the engine got good and warmed up to operating temperature. the oil pressure would fall off a cliff when it idled in gear at stops. Sometimes it would drop to zero and the Red Engine light on the dash would come on.
I have heard the rocker arms rattling before because the oil pressure fell off when I gunned it and it shifted gears.
After this latest round of wrenching on the bastard and finding all the gunk built up inside the engine, I filled it with whatever remnants of oil jugs I had laying around and a couple of quarts of ATF. I also left the old oil filter on it because I know I had knocked some serious chunks of crap down into the pan when I was scraping all of the built up gunk out of the valley between the heads where the lifters are.
Then after I finally got it started I just let it sit and idle for a while during which time I went around it checking for leaks. It ran for some time before I shut it off.
Later on I went out and drained the oil pan, left the plug out for a half an hour and changed the filter. I figured I would give it time to drain out real good and give any chunks a chance to work their way to the drain. What came out was in a word, nasty.
Then I put the drain plug in and filled it with 20/50 Wt oil plus a bottle of STP oil treatment because that stuff is the shit. I have been using it since the late 70’s in every rig I have ever owned.
Since then I have only driven it for round trips to the store and a trip to my Buddy’s house yesterday. A couple of miles round trip each time but enough that I can feel heat coming from the floor with the heater on. Even if it has been close to seventy five degrees around here.
I have been watching that oil pressure gauge like a hawk too.
I have been waiting for the pressure to drop off at idle after it gets warmed up but I never did see it. I figured maybe I just hadn’t run it hard enough yet.
Well I just got back from a lengthier trip up close to by where I work. I had some business to take care of. It’s pretty damn warm outside and this was in light to light traffic, about seven miles one way. Plenty of opportunity for the thing to get up to operating temp.
One time, when I was almost there, I had to stop at a light and I saw the oil pressure gauge start to fluctuate but it never did drop below the “N” in Normal on the gauge.
The same thing on the way home when I had to stop and the idle dropped down to about 700 RPM. Usually that’s when it would have dropped clear to zero and the Red Engine Light would have come on. One again it fluttered for a second but never dropped below that “N”.
Other than that, the oil pressure read up where it is supposed to, even at idle, without any fluctuation all the way there and all the way back..
I also noticed the thing seems to run smoother and the idle quality is definitely much better and smoother. As a matter of fact, it has never run this good since I bought it.
Cleaning all the carbon build up off of the fuel injectors and inside the intake manifold couldn’t have hurt.
I’m thinking the screen on the oil pump pick up tube was probably clogged up with all the gunk that was all over inside the rest of the engine and that ATF must have acted like a solvent and cleaned it out.
All the more impetus for me to drive it a bit more and change the oil again.
I won’t know for absolute certain until I take it for a nice long drive on the freeway on a hot day but so far I am certainly encouraged that just maybe that major issue might have been taken care of.
Because I was really starting to run out of this stuff,
Sorry Notwende, not quite yet it appears.