oil pump pick-up related

[grumpyvette]

http://forum.grumpysperformance.com/viewtopic.php?f=54&t=1800&p=5526#p5526

 

http://forum.grumpysperformance.com/viewtopic.php?f=54&t=2376

 

first Id point out that a simple spot/TACK welding if done with a typical arc welder leaves a brittle weld in some cases, and that BRAZING the complete joint is the PREFERRED method of locking the pick-up tube to the pump body

next, Id suggest a TIG or MIG weld but brazing is a bit more flexible

adding a brace and brazing it to the pick-up tube and use loc-tite on the bolt threads helps durability

brittle welds cause problems, and welding cast iron to mild steel is difficult, or darn near impossible at times ,the oil pump pick-up tends to vibrate at some engine speeds and over time it will weaken the joint if thats not braced or supported with a second support point, welding or brazing a brace and bolting it on the pump body helps, but a brazed connection tends to be a bit more flexible. many guys seat the tube with a hammer and flat screw driver blade against the rib on the pick-up tube shoulder with the result that it caused stress risers and the pick-up fails eventually, even if

fully supported but fully supported

bolt on pick-up designs are less likely to fail

 

 

in 40 plus years of building engines IVE NEVER seen a PROPERLY brazed and braced oil pump pick-up come loose, just remember to remove the spring and piston from the pressure regulating bye-pass and let the parts slowly air cool before lubricating and re-assembling the components.

 

BRAZE ROD MELTS at well OVER 800F and done correctly has a tensile strength of 50,000 PLUS psi when used, on clean metal surfaces

 

http://en.wikipedia.org/wiki/Brazing

 

http://www.weldguru.com/braze-cast-iron.html

 

Edited December 7, 2010 by grumpyvette