Thanks Sweet, HRL.

I think, no surprise here folks, HRL has nailed it again. For 18 years I've been using 30 weight year 'round. This past winter was a hard-to-start event for the 30 weight, so for the first time ever I did an oil change with 10-30. I then had a 1k trip in April and upon returning to VA the temps were now in the mid 70's. According to this chart I was and am at the upper range of temperature.

Steps to solve the problem:

I'm going to back away from the ledge. I consulted my '56 Motor's Manual and was ready to dive in and pull all the hydraulic valves and r+r the valves.

That step may be too much too fast too soon so I'll go with HRL's suggestion and then do an oil change with my tried and true 30 Weight.

I'll post back in a couple of days with the results.

As always, thanks.

Cosmo

~ Cosmo
1949 Chevy Half Ton
Rocinante, like Don Quixote, he is awkward, past his prime, and engaged in a task beyond his capacities.
"...my good horse Rocinante, mine eternal and inseparable companion in all my journeys and courses." ...Don Quixote, Cervantes
"If you come to a fork in the road, take it."...Yogi Berra
"Rudeness is the weak man's imitation of strength." ...Eric Hoffer