Diagnosing valve train noise (Harley-Davidson XL1200, 2012-2023) [Engine and systems: Engine repair]

To diagnose and correct noisy hydraulic lifters and valve train components, use the following procedures:

1. With engine and oil at normal operating temperature, check oil pressure at 2000 rpm. If oil pressure is above 50 psi (345 kPa) or below 5 psi (34 kPa), inspect oil pump, crankcase passages and oil hoses. Repair or replace parts as necessary.

2. If oil is reaching the hydraulic lifters, remove and inspect. Clean lifter bore of all foreign material. Replace parts as necessary. See 3.22 BOTTOM END OVERHAUL: ASSEMBLY, Tappets.

3. Examine pushrod, lifter and lifter bore for proper fit and any signs of unusual wear. Replace parts as necessary.

4. Visually inspect camshaft lobes for abnormal wear.

5. Remove camshafts and pinion gear, clean and inspect for wear and fit. Replace parts as necessary.

6. Remove cylinder head and rocker box assemblies. Check rocker arm end play and check for binding. Inspect valve stems for scuffing and check stem to guide clearance. Check valve seats for signs of looseness or shifting.

7. Face valves and valve seats.

Diagnosing valve train noise (Harley Sportster XL1200)