Top-End Overhaul
Cylinder heads off, valves and seats reworked or renewed, injectors calibrated, valve gear checked, and the engine run and set up afterwards.
Features
- Scope is defined before the work starts so the cost is known rather than discovered as heads come off.
- Heads are pressure-tested and valve seats cut, with any head beyond recovery identified early.
- Injectors are calibrated as a matched set, and the figures go into the job record.
- Liner and piston condition is inspected while the heads are off, which often determines when the major overhaul will be needed.
- The engine is run up and its readings recorded after the work, and those readings become the new baseline.
Specifications
| Figure | Typical range | Unit | Why it matters |
|---|---|---|---|
| Cylinders covered | 6 | partial work stores up a second visit | |
| Head condition findings | cracked, one head replaced | the part of the cost that cannot be quoted in advance | |
| Injector calibration figures | issued per injector | bar | needed to set the engine up properly afterwards |
| Liner condition observed | wear measured at top ring position | sets the expectation for the major overhaul | |
| Post-work readings | compression and temperatures | the new baseline for later comparison |