fastedy

While tracing oil leak and deciding to replace gasket found lifter parts in oil pan, what would cause a lifter to break. These mechanical lifters do not have a continuous cylinder shape, instead they have a tab or 25% (black section) of the cylinder with a crossbar connection the two lifters together (both lifters on #8) they broke at the base of the black section, engine was still running fine. Engine has less than 1.5 hours on it, Any help would be appreciated

BillK

Any chance of a close up picture of the broken ones with no red lines through them ? Sometimes a pic will provide a clue. One thing I can think of is if the lifter bores were not checked carefully and deburred, and if the lifters for some reason had a burr or machining "lip" at that point ... they may have broken during installation ? Just speculating without a picture of the actual broken part.

Does anything seem to be in a mechanical bind of any sort, especially at full lift ?

Thinking out loud

Bill Koustenis
Advanced Automotive Machine
Waldorf Md

fastedy

I'll try to get a picture of the broken lifter, thanks
Eddie