It is possible that you got some hose pieces or rust into your valve.
I'd unhook it and flush through it with a garden hose both directions,
being sure that it is wide open (HOT) when you do it.

We had a guy post here that got all bent out of shape when he caved in his
oil pan with a jack a number of months ago and we haven't forgotten his
spiteful unkindness. Nonetheless, if you use a piece of 2x4 lumber to pad
the pan, you can safely jack the pan far enough to change motor mounts.
I'd recommend getting 164 motor mounts - they are a little sturdier and
seem to last longer. Keeping oil off them helps a lot too. Every engine
I do I convert to neoprene seals in the timing cover, like the late B20s and
all B30s and later engines have. If you have trouble getting the timing
cover to do this, e-mail me offline.
--
George Downs, The "original" Walrus3, Bartlesville, Oklahoma