"Don't celebrate while the clock's still running," Silas said quietly. Jonah nodded without taking his eyes off the casting. When the full testing period had passed, they examined the repair and its surroundings once more before reducing the pressure. Only then did Silas lean back and say that the repaired section had held the controlled test exactly as it was supposed to.
Dale rested both hands on the bench. He wanted to say something large, something that might repay his son for the nights in the shop and the ridicule he had endured, but relief made him strangely inarticulate. "Well," he said, looking at the dry casting, "that's better than yesterday." Jonah laughed, a short exhausted sound, and for the first time in several days his father laughed with him.
Silas was careful not to let the moment become the end of the job. A pressure test did not establish that every aspect of the rebuilt engine was sound, and the repaired block still had to be assembled correctly, warmed gradually, inspected under operating conditions, and watched during actual work. Jonah knew all of that from his notebook, but hearing it spoken now gave the success its proper size. They had cleared an important obstacle, not reached the finish line.
The reassembly took another day. Dale did most of the heavier lifting while Jonah organized the parts and checked the service information, and Silas moved between supervising and resting when his hands began to shake. They took care not to create a new problem around the repaired area, checking the condition of the surrounding components as they went. The familiar old engine slowly recovered its shape on the stand until, by evening, it looked less like a dismantled machine and more like something that belonged in a tractor again.
Several times during the work Dale found himself asking Jonah a question he would once have directed automatically to Silas. Which surface needed another check? Had they accounted for the seal that had leaked during testing? Was the old component acceptable, or would replacing it now prevent another teardown? Jonah answered when he knew and went to the manual when he did not, and the willingness to check rather than bluff gradually became the most reassuring thing about him.
Silas noticed the change in his son's voice. Dale was no longer asking whether Jonah could be trusted with the repair; he was asking for the boy's judgment as one member of the team responsible for getting the machine back into service. The old man looked down at his hands, which trembled slightly even while they rested in his lap. For the first time in months, the tremor did not feel like the whole story of what he had lost.