IZh-2715 engine, no teardown: cylinder geometry restored, even compression, cleaner exhaust

Motor depot of the city association of medical institutions · approved by: General Director V. A. Gashkov · treatment performed by Khado-Yug LLC

Russia · treatment 09.03.2002 · repeat measurements 20.05.2002, after 3000 km of running

PRODUCTXADO revitalizantengine treatment without disassembly, during normal service

TEST OBJECTIZh-2715 vehicleplate No. 1022KKE · engine No. 7027701 · cylinder-piston group, 4 cylinders

DOCUMENT TYPETechnical report
signed and stamped by both parties

Key results

↑1.125kgf/cm²

compression cylinder by cylinder, 10-12 → 12-12.5 kgf/cm²

↑32%

running time on 200 ml of petrol at idle, 11 min 20 s → 15 min

↓25%

HC in the exhaust gas at idle, 590 → 450 ppm

↓0.06mm

cylinder diameter at the upper plane, at the lower one — 0.03 mm

EQUIPMENT	CONDITION AT THE START OF TESTING	WHAT WAS MEASURED
IZh-2715 vehicle, plate No. 1022KKE<br/>engine No. 7027701	Ten years in service; compression 10-12 kgf/cm² with a spread of 2 kgf/cm²; oil pressure “barely above zero and only on a warmed-up engine”	Compression cylinder by cylinder · cylinder diameters at the upper and lower measuring planes · running time on 200 ml of petrol · CO and HC at idle

Compression cylinder by cylinder, kgf/cm²

CYLINDER	BEFORE TREATMENT	AFTER 3000 KM	CHANGE
Cylinder 1	10	12	+2
Cylinder 2	11	12.5	+1.5
Cylinder 3	11	12	+1
Cylinder 4	12	12	0
Spread across the engine	2	0.5	−1.5

Compression does not rise above the factory nominal value: the cylinder with the highest initial reading stayed where it was, while the lagging ones caught up with it — this is exactly the evening-out recorded in the conclusions of the report.

Cylinder geometry: micrometry at two planes

MEASURING PLANE	CHANGE IN CYLINDER DIAMETER
Upper plane, 10 mm from the cylinder face	−0.06 mm on the diameter
Lower plane, 60 mm from the cylinder face	−0.03 mm on the diameter

The diameter decreased — a metal-ceramic layer has built up on the walls, and it is thicker where the wear was greater: at the upper plane, by the zone where the compression ring reverses. The restored geometry is the reason for the rise in compression.

Fuel, exhaust and oil pressure

PARAMETER	BEFORE TREATMENT	AFTER 3000 KM
Running time on 200 ml of petrol, idle	11 min 20 s	15 min
CO in the exhaust gas, idle	2.6 %	1.8 %
HC in the exhaust gas, idle	590 ppm	450 ppm
Oil pressure	Barely above zero and only on a warmed-up engine	Present at idle as well

Idle consumption was measured with a 200 ml portion of petrol on an engine warmed up to operating temperature; CO and HC — with a gas analyser at the same engine speed.

Conclusions of the commission

The report, approved by the customer and signed by the commission of both parties, records: “After the engine treatment, compression evened out across all cylinders and rose by an average of 1.125 kgf/cm². The geometric dimensions of the cylinders were optimised (on average they decreased by 0.06 mm on the diameter at the upper plane and by 0.03 mm on the diameter at the lower one). On 200 ml of petrol the engine ran 3 min 40 s longer, which gives an economic effect of 32 %. The CO reading decreased by 6.9 %; the HC reading decreased by 25 %. Oil pressure increased, and engine responsiveness increased. We consider that the use of the XADO revitalizant makes it possible to raise the technical reliability of the vehicle fleet and to minimise the material and time costs of its maintenance and repair.” Before the treatment, oil pressure barely held and only on a warmed-up engine — a ten-year-old vehicle was brought back without opening the engine, over 3000 km of the motor depot’s ordinary work.

The results relate to the petrol engine of an IZh-2715 vehicle after 3000 km of service; on other engines and duty cycles the figures may differ. The original technical report is published in full and available for download. The treatment was carried out and the conclusions of the report were drawn up by Khado-Yug LLC, a XADO representative; the report was approved by the general director of the customer motor depot.

Current equivalent

Revitalizant gel for cylinder restorationEngine cylinders, deep wear
Revitalizant gel for petrol enginesPetrol engines

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

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