Well that joy only lasted so long. The oil strainer began leaking, again, so I replaced it. The mechanical fuel pump (no longer in service) began leaking oil out its vent hole, so I replaced it. I forget what else started leaking - several things, including the rear crankshaft seal. I got it stopped again.
Then the other day it started leaking yet again. Cleaned it up, took it for a run, came back - oil coming out the dipstick tube! Gave up for the night but thought about it and realized this had to be excess crankcase pressure..hmm, I wonder if in my exhausted haze I put the pipe from the breather in the wrong place...next morning - yes that's it! I have never done this before but I absentmindedly connected it to the charcoal canister!Dumb dumb dumb but glad to figure it out. Switched it back to normal, went for a run. No more oil out the dipstick! Problem solved!
Wait what's that? Over on the left side - look - lots of oil leaking out!
I'm losing my mind with this thing. OK so I have the rear air housing off, and oil has been leaking from either the oil cooler itself, the oil cooler seals, the pressure switch, or the distributor shaft - can't tell which. I have already recently replaced all but the actual cooler.
Next step, I think I will try a pressure test on the cooler somehow. If I can't figure out a good way I'll swap in another from a spare engine I have but that's always dicey. I'll replace the oil cooler seals even though they are new anyway, and the pressure switch even though it's new anyway.
Hey how about sealant under the distributor hold-down plate? Is oil under pressure right there? I guess it shouldn't even get there so I'll try that too.
The biggest frustration of all this is that we want to go camping on Friday, the engine's all apart, I have no assurance that these things will actually fix my leak, and I'm supposed to be working for a living at the same time.
Anything I haven't thought of?
Jim
72 1700 type 4 dual PDSIT
Here's a picture:
![Image](http://i148.photobucket.com/albums/s31/grandfatherjim/Van/P9191273_zps703cd730.jpg)