wrench hound
Member
- Joined
- Aug 30, 2006
"the sound heard was probably the shaft seal?"
No, I think the piston drive tang moved out of its index slot, as I tightened the head. The head seemed slightly biased and did not want to line up perfectly as I advanced the two screws...so I figured the addition of two more screws (all four corners now) would help compress the springs evenly. I feel the "fragile" piston probably snapped from being in a bind, but the drive elements were also broken. I probably should scrap most of this pump, because I'm not confident crack detection methods will find all the stressed zones. The pump must have locked (broke)the belt instantly. The car had sat for a week, and the hydraulic valve actuators were drained...did not pump up. Removing the camshaft and applying 80lbs compressed air via the glowplug ports, all cylinders held this pressure with no sound of air escaping out the intakes or the exhausts! The cam and rubbing points on the inserts are shiny, no stress gouging, so I'm going to find another pump and run it till it blows......probably run it this winter, then major it next spring.
No, I think the piston drive tang moved out of its index slot, as I tightened the head. The head seemed slightly biased and did not want to line up perfectly as I advanced the two screws...so I figured the addition of two more screws (all four corners now) would help compress the springs evenly. I feel the "fragile" piston probably snapped from being in a bind, but the drive elements were also broken. I probably should scrap most of this pump, because I'm not confident crack detection methods will find all the stressed zones. The pump must have locked (broke)the belt instantly. The car had sat for a week, and the hydraulic valve actuators were drained...did not pump up. Removing the camshaft and applying 80lbs compressed air via the glowplug ports, all cylinders held this pressure with no sound of air escaping out the intakes or the exhausts! The cam and rubbing points on the inserts are shiny, no stress gouging, so I'm going to find another pump and run it till it blows......probably run it this winter, then major it next spring.