With those oil pressures I wouldn't worry about main and rod bearing
clearance very much.
Those are great pressures I think.

Generally, the flywheel end seal is called the Rear Main Seal .
the Front Crankshaft Seal is toward the rear bumper of the van.

On this leak ..
are you sure it's engine oil and not dark/dirty ATF ?
or even gear oil from the rear diff ?
I've seen the  side seals where the axles bolt on the side of the trans
get hard and leak ....
though not very often.

I have seen a few Rear main seal jobs not 'take' ...
perhaps from not-super-high-quality part ..
or workmanship as you suggest..
or wear on some part ..
  crank, bearings, drive plate, trans shaft etc.

Scott

On 10/21/2013 5:06 AM, Robert Clemmer wrote:
> SE Pennsylvania to SW Florida.  Yes, I have an oil pressure gauge.  It runs
> about 42 -45 lb at 4000 rpm until the oil goes over 220 degrees.  Then it
> starts to drop as the temperature goes up. Lowest it has ever gone when
> engine is at speed is 35 lb.  Idle oil pressure holds 10 lb. even at the
> higher temperatures.
>
>
>
> I really don't want to mess with it except for the oil leak at the front of
> the engine. I already paid $500 plus to have the front main seal (flex plate
> side) replaced two years ago, but still leaks, leaves pecker tracks in the
> driveway and spots up the rear of the car on long drives.  Seems like unless
> I fix it myself it is never done right.
>
>
>
> From: Scott Daniel [mailto:scottdaniel@turbovans.com]
> Sent: Sunday, October 20, 2013 10:57 PM
> To: Robert Clemmer; vanagon@GERRY.VANAGON.COM
> Subject: Re: Another trip to SWFL
>
>
>
> what/where is SWFL ???
>
> SouthWest Florida ?
>
> I'm in RVOR myself.
>
> S.
>
> On 10/20/2013 6:58 PM, Robert Clemmer wrote:
>
> Just ran another non-stop 1200 mile trip to SWFL in my young 91 tin top 2.1
> wbx.  This trip it will turn 270k miles.  I know I should open it up and do
> the main and rod bearings but it is just soooooo smooth.  The oil pressure
> is good even when the  oil climbs to 235 degrees in the 90 degree temps down
> here.  The lube oil analysis reports are always good.  I hate to mess with
> something that is operating so flawlessly.
>
>
>
> Bob C
>