Engine weakness

[Tiapan]

I thought i would start this thread to share differant findings or popular knowledge about differant engines and there factory weaknesses, when modded or not, its interesting to know and is also great pub ammo

may also help correct many beliefs or rumours

ill start...

Boss 5.4's sintered metal oil pump gears, fail with high rpm or hp, need billet oilpump gears

Nissan SR20, rocker arms jump off the lifter in high rpm applications, need to use rocker arm stoppers

Cleveland, oiling system can starve the bottom end, can be corrected with oil restrictor kit,
core shift in many blocks

Windsor 302 - prone to splitting due to thin webbing, aftermarket blocks have corrected this.

Boxer - cracking piston skirts in stock application when being thrashed in cool weather

Holden v8- might be quicker to list the pro's? lifter bore alighnment to cam, always on the , needs brass lifter bores installed

Holden 202- Shreading cam gear when pushed too hard

ill add more later, see what you can thing of