sam am I
Commander
- Joined
- Jun 26, 2013
- Messages
- 2,169
I bought a JDM engine (4th one from same source over the years) the other day to drop in GF's Honda (1.7L Vtec), I pulled a plug and shinned a flashlight in, noticed the below, pulled the head off after the few loose ones stuck to the magnet that I had initially dropped in through the spark plug hole.
https://drive.google.com/open?id=1jb...V_cz9QL0WGRe2h
Has anyone ever seen this?.......Tiny steel spheres ("pitting balls"?) forming/growing/deposited all around on the piston edges? I've never seen this, the valves look ok (from the top anyway) and the bore walls are mirror clean, the oil pan oil has no metal in it to speak of (lower end seems ok), no evidence of what and where these are coming from, is it from the rings?
Seems if the rings were going, the bore walls would show some effect.....hmmmmm. This piston in the photo is the worst but, appears they are growing on the other as well, any idea's? My Mech friend of 50 some years is perplex as well and this man runs 10-30W in his veins .....
https://drive.google.com/open?id=1jb...V_cz9QL0WGRe2h
Has anyone ever seen this?.......Tiny steel spheres ("pitting balls"?) forming/growing/deposited all around on the piston edges? I've never seen this, the valves look ok (from the top anyway) and the bore walls are mirror clean, the oil pan oil has no metal in it to speak of (lower end seems ok), no evidence of what and where these are coming from, is it from the rings?
Seems if the rings were going, the bore walls would show some effect.....hmmmmm. This piston in the photo is the worst but, appears they are growing on the other as well, any idea's? My Mech friend of 50 some years is perplex as well and this man runs 10-30W in his veins .....
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