no flow
#1
Member
CRAFTSMAN
Thread Starter
Join Date: Jan 2004
Location: grove city,oh.
Posts: 58
no flow
Have had my sbc assembled and on a stand for about a year now. couple day ago put a drill on pump drive tool and spun ,got 40 lbs on gauge. Ran drill/pump for about five mins. and had vary low flow out of four rocker arms? rotated engine several times while pump was running and no change!Used assembly lube when I put motor together and have no restrictors in motor.And of course I`m pretty dam sure cam bearings are in right?
#2
Seeing as how the engine has been sitting for about a year, the bypass plunger
and spring in the oil pump could be stuck in a position as to not allow full
pressure. Another thought is to much clearance on the crank mains and rod insert
bearings. I would pull the pan, check the spring tension, and plunger on the pump bypass, also check you clearances while the pan is off. Hope this helps.
and spring in the oil pump could be stuck in a position as to not allow full
pressure. Another thought is to much clearance on the crank mains and rod insert
bearings. I would pull the pan, check the spring tension, and plunger on the pump bypass, also check you clearances while the pan is off. Hope this helps.
#3
One thing I have seen that will cause this is lifter bore clearance. On my race engine I have a little more lifter bore clearance than I like and I have heck trying to get oil to the rocker arms with a primer. Zero problems once the engine is running. This can be easily verified with the intake off, but little tougher with it on. I can't say with absolute certainty that this is your problem, just something else to look at. I was surprised at how much oil the lifter bores will dump when you are spinning it with a primer.
Curtis
Curtis