502 losing oil pressure
10-07-2013, 05:17 PM
#11
Platinum Member
Platinum Member
I had the same problem and it was spun crank bearing. Motor ran fine believe it or not and it finally blew after a complete summer of running it. The temp ran kinda hot a little over 200 °. I would get it checked out.
10-07-2013, 06:01 PM
#13
On a motor with clearances set right ,10# per thousand is what gm used to say (bbc) .That being said ,I don't want to idle under 20#'s and the way pumps work , the pressure will rise faster than 10#'s per 1000 throttling up, until you reach the pump blow off pressure. Usually 60 + #'s with the blue spring. Running too much pressure cost power and wears pump / distributor gears faster than necessary.
10-07-2013, 07:34 PM
#14
Gold Member
Gold Member
iTrader: (5)
Join Date: Oct 2005
Location: Olmsted Falls,Ohio Marblehead,Oh
Posts: 11,634
Likes: 0
Received 204 Likes
on
132 Posts
On a motor with clearances set right ,10# per thousand is what gm used to say (bbc) .That being said ,I don't want to idle under 20#'s and the way pumps work , the pressure will rise faster than 10#'s per 1000 throttling up, until you reach the pump blow off pressure. Usually 60 + #'s with the blue spring. Running too much pressure cost power and wears pump / distributor gears faster than necessary.
VIP Member
