Reporting - Explanation of Results Table 2

METALS		ORIGIN	CAUSE
Iron	Fe	Liners,rings,cams,tappets,etc. Dust	Wear(upper engine)
Chromium	Cr	Chromium plated rings Chromium plated liners Cooling water (Na or K chromate anti-corrosion additive)	Wear(upper engine) Leak in cooling circuit
Silicon	Si	Atmospheric dust Pistons All Al-Si parts Cast Si liners Anti-foam additive in the lubricant Silicon gaskets Anti-corrosion additive	Defective air filter or supplementary air Engine wear Gasket wear Leak in cooling cicuit
Aluminum	Al	Pistons Al-Sn bearings (Fuel contaminant)	Piston wear Bearing wear
Boron	B	Lubricant additives Anti-corrosive in the cooling water	Leak in cooling cicuit
Lead	Pb	Cu-Pb bearings Residue of fuel combustion	Bearing wear Tinning of containers
Cooper	Cu	Cu-Pb bearings Bronze bushes	Bearing wear
Tin	Sn	Cu-Sn, Al-Sn or tin flashed bearings	Bearing wear
Silver	Ag	Bearings	Bearing wear
Barium	Ba	Lubricant additives	-
Calcium	Ca	Lubricant additives	-
Magnesium	Mg	Lubricant additives Sea water	-
Zinc	Zn	Lubricant additives	Bearing wear