When I first start my 1955 Dodge with the 270 Poly V8, the oil
pressure takes 5 or so seconds to get the guage moving and up to operating
pressure. It runs around 45 pounds at idle once it builds up or at least that
is what the guage shows. If I pump it and let it crank and idle and build up,
no problems. If it goes up past idle at start, I hear what might be mains
rattling. It seems to improve when I changed the oil. I run 30W in it.
Any ideas what the cause is?
Tom Taylor