ZIL-MMZ-45021 tipper: compression up in every cylinder, no teardown

Compression rose in every cylinder, cylinder-piston sealing was restored, idle fuel burn slowed. ZIL-MMZ-45021 tipper truck, Imstalkon JSC. Kazakhstan · 2001.

Imstalkon JSC, AMF-1 · chief engineer Pak V. M., chief mechanic Dumaev N. P., fleet manager Karlov G. T. · treatment carried out by GAYER LLP

Contract No. 02/XADO of 19.06.2001 · measurements after 2736 km of running over 28 days

PRODUCTXADO technologytreatment of the engine and cylinders, gearbox and rear axle final drive — without dismantling the units

TEST OBJECTZIL-MMZ-45021 tipper truckengine No. 080403 · chassis No. 2456730 · plate A953 VS

DOCUMENT TYPEReport — annex No. 4
to contract No. 02/XADO

Key results

↑25-46%

compression across the cylinders, 3.0-5.0 → 4.0-7.0 kgf/cm²

↑2min

running time on 1 l of petrol at idle, 16 → 18 min

EQUIPMENT	CONDITION AT START OF TESTING	WHAT WAS MEASURED
ZIL-MMZ-45021 tipper truck,<br/>engine No. 080403	built 1986, 15 years in service by the time of treatment; compression 4.8-5.0 kgf/cm², in cylinder 7 3.0 kgf/cm²	Compression across 8 cylinders; engine running time on 1 l of petrol at idle

Compression by cylinder, engine No. 080403

CYLINDER	BEFORE TREATMENT, KG/CM²	AFTER TREATMENT, KG/CM²	CHANGE
1st	4.9	6.5	+33 %
2nd	4.9	7.0	+43 %
3rd	4.9	7.0	+43 %
4th	5.0	6.5	+30 %
5th	4.8	6.0	+25 %
6th	4.8	7.0	+46 %
7th	3.0	4.0	+33 %
8th	4.8	6.5	+35 %

Each cylinder was measured before treatment and after 2736 km of running; the engine was not dismantled and the truck stayed in service.

Fuel consumption at idle

PARAMETER	BEFORE TREATMENT	AFTER TREATMENT
Engine running time on 1 l of petrol	16 min	18 min

Measured at idle as the time taken to consume one litre of petrol.

Commission conclusion

The commission of Imstalkon JSC and GAYER LLP recorded in the report: «Thus, the engine operating parameters have been improved, as can be seen from the increase in compression in the cylinders». The increase was recorded in all eight cylinders: in seven of them from 4.8-5.0 to 6.0-7.0 kgf/cm², meaning that the sealing of the cylinder-piston group was restored throughout an engine that had by then been in service for 15 years. The units were not dismantled, the truck stayed in operation and covered 2736 km in 28 days. The report separately notes: «The insignificant change in compression in cylinder 7 possibly indicates mechanical damage in that cylinder. The engine should be dismantled in order to establish the true cause of this fact». Even in that cylinder compression rose from 3.0 to 4.0 kgf/cm².

The results relate to the ZIL-MMZ-45021 tipper truck with a petrol engine and to the stated measurement conditions; figures may differ on other equipment. The report was drawn up as an annex to contract No. 02/XADO and signed by both parties — the contractor GAYER LLP and the customer. The original report with signatures and stamps is published in full and available for download.

Current equivalent

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

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

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