The valve stem seals you have are the same ones I used, White on Exhaust--- Brown with spring on Intake if I remember correctly.
POSITIVE TYPE VALVE STEM SEAL INSTALLATION.
1. Place plastic sleeve over valve stem and lube with a couple drops oil.
2.Carefully push the valve stem seal down until it touches the top of the valve guide.
3. Remove the plastic sleeve.
4 Using a suitable tool, press the seal down over the guide until the seal is fully seated. It is important that the seal is completely seated.
5. Replace the rocker arm assembly, The inside of the valve spring or damper must not contact the seal or damage to the seal may be done.
Rotate the motor so the valves don't drop down.
The engine rotates in a clockwise direction as seen from the front of the truck, and for every 1/4 turn of the engine(crank) each next piston will arrive at TDC. So, When the line on the vibration damper is at the 2 oclock position, cylinders 2 and 5 will be at TDC. When the mark is at the 5 oclock position, cylinders 7 and 6 will be at TDC, 8 oclock has cylinders 3 and 8 at TDC, and back to 11oclock, 1 and 4 will be at TDC.
Cylinder numbers are assigned 1,3,5,7 on the left (passenger USA) bank from front of truck to back, and 2,4,6,8 on the driver's side (USA), front to back. Firing order is 1,2,7,3,4,5,6,8.
