PAZ buses: compression evened out with no engine teardown

Compression across cylinders equalized, the underperforming cylinder reached the level of the others. 3–17 % — compression across the cylinders of engine A 944 ma, 9.5–11.2 → 10.0–11.2 (2007).

PATP motor transport enterprise, Stupino, Moscow Region · approved by Director B. I. Yurasov, signed by Chief Engineer N. I. Tilikin

Stupino, Moscow Region, Russia · treatment 24.08.2007 · control measurement 06.09.2007 · report dated 10.09.2007

PRODUCTXADO revitalizant gel
for petrol enginesstaged treatment, 6 doses · Antikoks decarbonizer · Vita Flush engine flush · XADO Atomic Oil 10W-40

TEST OBJECTTwo PAZ buses in scheduled servicereg. no. A 944 ma and no. T 642 mkh · petrol eight-cylinder engines

DOCUMENT TYPEProduction test report,
approved by the PATP director

Key results

↑3–17%

compression across the cylinders of engine A 944 ma,9.5–11.2 → 10.0–11.2

compression evened out across the cylinders

EQUIPMENT	CONDITION AT START OF TESTS	WHAT WAS MEASURED
PAZ bus, reg. no. A 944 ma	Engine in scheduled service, wear up to 80 %	Compression on all 8 cylinders, oil pressure
PAZ bus, reg. no. T 642 mkh	Engine in scheduled service, wear up to 80 %; cylinder 2 with collapsed compression	Compression on all 8 cylinders, oil pressure

Compression by cylinder — both engines, before and after treatment

CYLINDER	A 944 ma, BEFORE	A 944 ma, AFTER	T 642 mkh, BEFORE	T 642 mkh, AFTER
Cylinder 1	9.8	10.6	10.9	11.0
Cylinder 2	10.4	10.5	5.8	10.5
Cylinder 3	9.6	11.2	10.3	11.0
Cylinder 4	10.5	10.9	11.0	11.5
Cylinder 5	11.2	11.2	11.5	11.6
Cylinder 6	9.6	10.4	11.3	11.3
Cylinder 7	10.6	10.9	11.1	11.3
Cylinder 8	9.5	10.0	11.8	10.8
Spread between cylinders	1.7	1.2	6.0	1.1

Pre-treatment measurements — 24.08.2007, control measurements — 06.09.2007; the unit of compression is not stated in the report.

Findings of the commission of PATP Stupino

The engines were running with wear of up to 80 %, and on bus T 642 mkh cylinder 2 held a collapsed 5.8 against 10.3–11.8 on the other seven: after treatment it came up to 10.5, with most of the gain arriving not on the day of treatment but over the following 13 days of ordinary scheduled service. The enterprise commission recorded: 1). The compression and oil pressure figures obtained after treating the engines with the XADO restorative compound indicate improved engine operation, despite their substantial wear over long service. 2). The effectiveness of XADO motor oil and revitalizant gels is confirmed not only by the engine parameters before and after treatment, but also by smoother engine running and by improved throttle response and power in service.

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

About this result: Compression Oil pressure

Limits of this report: The results relate to petrol engines of PAZ buses that had used up a significant part of their service life, and to urban scheduled-service conditions; on other equipment the figures may differ. The treatment was carried out by the Moscow Representative Office of XADO LLC — the product supplier.

Request a pilot for this unit

PAZ buses: compression evened out with no engine teardown

Key results

Compression by cylinder — both engines, before and after treatment

Findings of the commission of PATP Stupino

Pilot treatment on the enterprise's equipment

Technology deployment programme

PAZ buses: compression evened out with no engine teardown

Key results

Compression by cylinder — both engines, before and after treatment

Findings of the commission of PATP Stupino

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