12698484

1. [
2. {
3. "step": 1,
4. "title": "Relieve 350 bar High-Pressure Fuel Rail",
5. "instruction": "Disconnect fuel pump control module (FPCM) harness. Crank engine for 10 seconds. Check GDS2 scan tool to verify fuel rail pressure is below 1 MPa."
6. },
7. {
8. "step": 2,
9. "title": "Inspect Engine Oil for Gasoline Dilution",
10. "instruction": "Check dipstick and oil filler cap. If oil smells strongly of gasoline or viscosity has degraded due to pump shaft seal leakage, replace engine oil and filter."
11. },
12. {
13. "step": 3,
14. "title": "Inspect Roller Lifter Tappet GM 12674744",
15. "instruction": "Slide out roller lifter from cylinder head. Inspect roller bearing for pitting or flat spots. Coat lifter in clean engine oil prior to reinsertion."
16. },
17. {
18. "step": 4,
19. "title": "Torque Pump Flange Bolts to TTY Spec",
20. "instruction": "Set camshaft drive lobe to low circle. Hand-start new TTY flange bolts. Tighten evenly in alternating stages to 12 N\u00b7m, then apply a final 45-degree angle turn."
21. },
22. {
23. "step": 5,
24. "title": "Connect High-Pressure Hard Line & Torque",
25. "instruction": "Align high-pressure delivery pipe into pump outlet. Hand-tighten flare nut squarely, then torque flare fitting to exactly 32 N\u00b7m."
26. }
27. ]

Typowe diagnostyczne kody usterek (DTC) wyzwalane w przypadku zuzycia, awarii obwodu lub rozkalibrowania tego wtryskiwacza common rail: