Senior Tech Team
Join Date: Apr 2012
Location: Yerington, Nevada
Re: WAY to much oil pressure on first fire
OK, we need to go over what welds to what. CAST IRON doesn't weld well, not even to itself, and, many pickups that have been cold or other types welded, brazed to pump covers end up falling out of the caps. Other issues occur as well, such as relief pressures being way too high from welding heat related distortion.
I'd say to look the various places on the block, filter and pump for problems, especially the pressure reliefs in the pump, and big blocks.
When I build a small, or big block, I use a big block regular pressure pump, and nothing else. Easy modification to clear the rear crank throw and rods.
One thing I do to the pumps ia NOT weld/braze the pickup to the cover, but fabricate a steel bracket that bolts to the pump cover bolts, and around the pickup tube to hold it n place. These prackets are also available already built, and ready to install on the pump and pickup, no hassles, no welding, no brazing, no excess heat.