Sorry, I'm bored. Been reading recent posts about low Oil Pressure and Knocking Noises.
My "fresh" engine had a very subtle knock at just off idle, under load.
Here's what I found when I opened up my knocking engine:
All 6 top rings were either split, broken or collapsed
This piston has both detonation damage and what is probably a piece of spark plug or ring marks on top.
This damage is from a "piece of "somethin' " bouncing around.
Bearing shell "chicklets" - oil pan.
Number "4" (thrust) main bearings.
Number "2" spun bearings - tabs are gone...
Another view of number "2", shows just how much metal is gone.
Number "3", also spun.
Number "1" main bearing - down to the copper.
Number "2" crank journal (I think).
Another view of main journal.
All rod journals are not pretty anymore.
ALL rod "big-ends" were egg-shapped from detonation.
Thank goodness for competent machine shops - main saddle crack was noticed just before 4-bolt main cap set-up.
Crank was MagnaFluxed and found to be cracked.
The JE Forged Pistons were OK and the Rods were re-sized. In retrospect, I wish that I had popped for a set of Forged Rods, but I'll take my chances.
My "fresh" engine had a very subtle knock at just off idle, under load.
Here's what I found when I opened up my knocking engine:
All 6 top rings were either split, broken or collapsed
This piston has both detonation damage and what is probably a piece of spark plug or ring marks on top.
This damage is from a "piece of "somethin' " bouncing around.
Bearing shell "chicklets" - oil pan.
Number "4" (thrust) main bearings.
Number "2" spun bearings - tabs are gone...
Another view of number "2", shows just how much metal is gone.
Number "3", also spun.
Number "1" main bearing - down to the copper.
Number "2" crank journal (I think).
Another view of main journal.
All rod journals are not pretty anymore.
ALL rod "big-ends" were egg-shapped from detonation.
Thank goodness for competent machine shops - main saddle crack was noticed just before 4-bolt main cap set-up.
Crank was MagnaFluxed and found to be cracked.
The JE Forged Pistons were OK and the Rods were re-sized. In retrospect, I wish that I had popped for a set of Forged Rods, but I'll take my chances.
