RAM 2500 Truck 2WD L6-359 5.9L DSL Turbo VIN D FI (1997)
Valve Guide: Service and Repair
Service Procedures
Thick Wall
1. Machine the cylinder head valve guide bores to 14.000 ±0.013 mm (0.5512 ±0.0005 inch) diameter.
2. Valve guides must be centered with valve seats within 0.35 mm (0.01378 inch) diameter. Valve guides must also be square with the combustion face
within 0.10 mm (0.004 inch) at 50.0 mm (2.0 inch) radius.
3. Lubricate the valve guides with oil and press in the guides to 12.25 ±0.50 mm (0.4823 ±0.020 inch) protrusion above the cylinder head.
4. Ream the bores to 8.029 ±0.010 mm (0.3161 ±0.0004 inch).
Thin Wall
1. Machine the cylinder head valve guide bores to 11.125 ±0.013 mm (0.4380 ±0.0005 inch) in diameter.
2. Service valve guides must be centered with valve seats within 0.35 mm (0.01378 inch) diameter. They must also be square with the combustion face
within 0.10 mm (0.004 inch) at 50.0 mm (1.9685 inch) radius.
3. Lubricate the valve guides with oil and press the guides flush to the bottom of the bosses.
4. Trim off the top of the valve guides flush to top of guide bosses, if necessary.
5. Machine the valve guide bores to 8.029 ±0.010 mm (0.3161 ±0.0004 inch).
6. The valve guide bore must be centered with the valve seat within 0.35 mm (0.0138 inch) diameter. It also must be square with the combustion face
within 0.010 mm (0.0004 inch) at 50.0 mm (2.0 inch) radius.
