FIELD CASE STUDY|COMPANY VEHICLE FLEET|ENGINES · PISTON GROUP
XADO RVS IMPLEMENTATION REPORT · JANUARY 1997
Mixed-brand fleet: compression gain instead of reboring and new rings
PRODUCTXADO RVSengine treatment on vehicles in service
TEST OBJECTNine fleet vehiclesMoskvich · RAF · two UAZ · KAMAZ · two VAZ 2106 · GAZ 2410 · GAZ 31029
DOCUMENT TYPEImplementation report
signed and stamped
signed and stamped
Key results
↑0.5-2kgf/cm²
compression across cylinders, 7-10 → 7.5-12 kgf/cm²
| VEHICLE | CLASS | WHAT WAS MEASURED |
|---|---|---|
| Moskvich No. 7402 | passenger car | compression, 4 cylinders |
| RAF No. 8675 | minibus | compression |
| UAZ No. 2117 | off-road vehicle | compression, 4 cylinders |
| UAZ No. 4727 | off-road vehicle | compression, 4 cylinders |
| KAMAZ No. 2178 | truck | oil pressure in the lubrication system |
| VAZ 2106 No. 2963 | passenger car | compression, 4 cylinders |
| VAZ 2106 No. 2964 | passenger car | compression, 4 cylinders |
| GAZ 2410 No. 2032 | passenger car | compression, 4 cylinders |
| GAZ 31029, 343MO | passenger car | compression, 4 cylinders |
Compression across cylinders, kgf/cm²
| VEHICLE | BEFORE TREATMENT | AFTER TREATMENT |
|---|---|---|
| Moskvich No. 7402 | 9 · 9 · 9 · 9 | 10 · 10 · 10 · 10 |
| RAF No. 8675 | 10 · 10 | 12 · 12 |
| UAZ No. 2117 | 8 · 7 · 8 · 8 | 10 · 9 · 10 · 9 |
| UAZ No. 4727 | 7 · 7 · 7 · 7 | 7.5 · 7.5 · 7.5 · 7.5 |
| VAZ 2106 No. 2963 | 9 · 10 · 9 · 10 | 10 · 10 · 10 · 10 |
| VAZ 2106 No. 2964 | 10 · 10 · 9 · 10 | 10.5 · 11 · 10 · 10.5 |
| GAZ 2410 No. 2032 | 8 · 8 · 8 · 8 | 9 · 9 · 9.5 · 9 |
| GAZ 31029, 343MO | 8 · 8 · 8 · 8 | 9 · 9 · 9 · 9 |
Compression does not rise above the engine's factory rating: bringing every cylinder to the same value is the maximum achievable result.
Lubrication system — KAMAZ No. 2178
| PARAMETER | BEFORE TREATMENT | AFTER TREATMENT |
|---|---|---|
| Oil pressure, kgf/cm² | 3 | 3.5 |
Higher pressure means restored clearances in the lubrication system: the pump holds pressure again.
Commission's conclusion
The commission of KharP JSC — the head of the motor transport shop, the shop mechanic and the mechanical engineer of the Chief Mechanic's Department — recorded in the report: «The test result showed that engine compression increased on average by 0.5 unit to 2 units, which eliminates the need to disassemble the engines, rebore the blocks, and replace pistons, piston rings and bearing shells». The report was approved by the Vice-President — Chief Engineer of the enterprise.
Worn engines went into treatment: 7-10 kgf/cm² across the cylinders. The gain was recorded on all eight vehicles where compression was measured — from the Moskvich and VAZ to UAZ, GAZ and RAF. On VAZ 2106 No. 2963 all four cylinders reached 10 kgf/cm²: compression does not rise above the rated value, so such levelling is the limit of what is achievable. On KAMAZ No. 2178 the oil pressure in the lubrication system increased.
Worn engines went into treatment: 7-10 kgf/cm² across the cylinders. The gain was recorded on all eight vehicles where compression was measured — from the Moskvich and VAZ to UAZ, GAZ and RAF. On VAZ 2106 No. 2963 all four cylinders reached 10 kgf/cm²: compression does not rise above the rated value, so such levelling is the limit of what is achievable. On KAMAZ No. 2178 the oil pressure in the lubrication system increased.
The results apply to the listed vehicles of the KharP JSC fleet and to their operating conditions; on other equipment the figures may differ. RVS is an obsolete XADO designation, the zero-generation compounds; the current generation of products is revitalizants. The original signed and stamped report is published in full and available for download.
Current equivalent
- Revitalizant gel for cylinder restorationEngine cylinders, deep wear
- Revitalizant gel for petrol enginesPetrol engines
How such units are treated: