>I replaced the oil with SAE 40

When the lifters bleed down on my Westy, it takes 20 to 30 minutes for
them to pump back up.  I run Mobil 1 15w-40 all year (southern climate)
and I think that just might help you as well.  Straight 40-weight does not
flow as well as 15-w40 when cold, and good-flowing oil is what you need to
pump up those lifters.

I always make it a point to drive my Westy at least once on each weekend
now that it's not hauling me and my children around full-time, and that
definitely seems to keep Camel, and me, much happier.

Chris S.
'85 Wolfsburg Westy "Camel"
http://www.knology.net/~vw/dadada.jpg