KamAZ and ZIL-130: higher compression and fuel savings instead of overhaul

STIROL Concern OJSC, motor transport shop · shop commission: Deputy Head of the Motor Transport Shop Yu. I. Probachai, repair service foreman I. I. Prokhorenko, repair fitter A. V. Bugrovoi · approved by the technical director of the plant, seal

Horlivka, Ukraine · act dated 02.12.1999

PRODUCTXADO RVSXADO repair-and-restoration formulation · treatment performed by XADO LLC

TREATED OBJECTEngines of two trucksKamAZ dump truck, reg. No. 1652 YaN1 · ZIL-130, reg. No. 78-79 YaNA

DOCUMENT TYPECompany act
with signatures and seal

Key results

↑3.7-10.8%

compression in the ZIL-130 cylinders, 6.5–8.9 → 7.2–9.5 kgf/cm²; gain in 3 of 4 readings; the rest unchanged

↓11.5-13.5%

fuel consumption of both trucks, 100 ml burned in 45 → 52 and 100 → 113 s

VEHICLE	MILEAGE AT START	WHAT WAS MEASURED
KamAZ dump truck, reg. No. 1652 YaN1	76,443 km	Fuel consumption, oil pressure
ZIL-130, reg. No. 78-79 YaNA	49,426 km	Compression by cylinder, fuel consumption, oil pressure

ZIL-130 — compression by cylinder

CYLINDER	BEFORE, kgf/cm²	AFTER, kgf/cm²	GAIN
Cylinder 2	8.2	8.5	+0.3 · +3.7 %
Cylinder 3	8.9	9.5	+0.6 · +6.7 %
Cylinder 4	8.6	8.6	no change
Cylinder 6	6.5	7.2	+0.7 · +10.8 %

Compression is capped by the engine's rated value, so the largest gain came from the most worn cylinder: 6.5 → 7.2 kgf/cm².

Fuel consumption and oil pressure — both trucks

PARAMETER	KAMAZ, BEFORE → AFTER	ZIL-130, BEFORE → AFTER	CHANGE
Time to burn 100 ml of fuel, s	45 → 52	100 → 113	consumption −13.5 % · −11.5 %
Oil pressure, kgf/cm²	3 → 3.5	1 → 1.7	+0.5 · +0.7
Coolant temperature, °C	60 → 60	60 → 60	thermal conditions of the readings identical

Fuel consumption is inverse to the time taken to burn the control portion: the longer it lasts, the more economical the engine.

Conclusion of the plant commission

The engines were treated without disassembly, on trucks that kept hauling cargo: during the observation period the KamAZ covered 2,357 km and the ZIL-130 3,887 km. Before the treatment the ZIL-130 held an oil pressure of 1 kgf/cm², and its weakest cylinder delivered 6.5 kgf/cm²; after the treatment both figures rose, and rose more where the wear was greater — the restored tightness of the cylinder-piston group is what produced the fuel savings on both trucks. The commission of the motor transport shop recorded in the act: «The results obtained show that it is expedient to apply XADO technology for restoring the cylinder-piston group, plain bearings, the crankshaft and other friction pairs instead of a conventional engine overhaul».

The results refer to the engines of the KamAZ dump truck and the ZIL-130 of the motor transport shop of STIROL Concern OJSC; on other equipment and under other operating conditions the figures may differ. RVS is an obsolete XADO designation, the zero-generation formulations; the current product generation is revitalizants. The original act with signatures and seal is published in full and available for download.

Current equivalent

Revitalizant gel for cylinder restorationEngine cylinders, deep wear
Revitalizant gel for diesel enginesDiesel engines

How such units are treated: Cylinder-piston group Diesel engine

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