IE A011ENGINE TREATMENT REPORTS · 10.10.2003
UAZ-3962 and VAZ-21093: compression up, cylinders evened out — no teardown
Compression increased in all cylinders of both engines, the weakest caught up, cylinders evened out. 25–65.3 % — compression per cylinder, 4.9–5.4 → 8.1–8.2 on the UAZ and 8–10 → 12–12.5 on the VAZ (2003).
with signatures and stamps
What repeated on both engines
| VEHICLE | CONDITION AT START | WHAT WAS MEASURED | REPORT DATE |
|---|---|---|---|
| UAZ-3962<br/>plate No. E 294 VR 51 | built 1994, 9 years in service | Compression in each of the four cylinders before and after treatment | 10.10.2003 |
| VAZ-21093<br/>plate No. E 935 VR 51 | built 2000, about 3 years in service | Compression in each of the four cylinders before and after treatment | 10.10.2003 |
Compression per cylinder — both engines
| VEHICLE | CYLINDER | BEFORE | AFTER | CHANGE |
|---|---|---|---|---|
| UAZ-3962, E 294 VR 51 | No. 1 | 5 | 8.2 | +64 % |
| UAZ-3962, E 294 VR 51 | No. 2 | 5.1 | 8.2 | +61 % |
| UAZ-3962, E 294 VR 51 | No. 3 | 5.4 | 8.2 | +52 % |
| UAZ-3962, E 294 VR 51 | No. 4 | 4.9 | 8.1 | +65 % |
| VAZ-21093, E 935 VR 51 | No. 1 | 9.5 | 12 | +26 % |
| VAZ-21093, E 935 VR 51 | No. 2 | 10 | 12.5 | +25 % |
| VAZ-21093, E 935 VR 51 | No. 3 | 10 | 12.5 | +25 % |
| VAZ-21093, E 935 VR 51 | No. 4 | 8 | 12 | +50 % |
Compression is given exactly as recorded in the reports: the documents do not name the unit of measurement, so the change is expressed as a percentage.
Cylinder evening-out — both engines
| VEHICLE | COMPRESSION BEFORE | COMPRESSION AFTER | SPREAD BETWEEN CYLINDERS |
|---|---|---|---|
| UAZ-3962, E 294 VR 51 | 4.9–5.4 | 8.1–8.2 | 0.5 → 0.1 |
| VAZ-21093, E 935 VR 51 | 8–10 | 12–12.5 | 2.0 → 0.5 |
The spread is the difference between the strongest and the weakest cylinder. The weakest cylinders gained the most: 4.9 → 8.1 and 8 → 12.
Conclusion from the two reports
Current equivalent
- Revitalizant gel for petrol enginesPetrol engines
- Revitalizant gel for cylinder restorationEngine cylinders, deep wear
How such units are treated:
About this result:
Limits of this report: The results relate to the four-cylinder petrol engines of UAZ-3962 and VAZ-21093 vehicles in a fleet's regular service; on other equipment and under other conditions the figures may differ.