Inspect the valve springs.
Measure the valve spring.
A load of 289.13 to 321.16 N. [65.0 to 72.2 lb] (1991) and 359 to 397 N. [80.7 to 89.2 lb] (1994) is required to com
press the spring to a height of 49.25 mm [1.94 in].
Diesel Engines Troubleshooting
Diesel Engines Repair