818048 Volvo.Penta Screw

Table 1
Valve Lash Check with the Engine Stopped
Valves Acceptable Range of Valve Lash
Inlet 0.42 to 0.58 mm (.017 to .023 inch)
Exhaust 1.19 to 1.35 mm (.047 to .053 inch) If the measurement is not within tolerance, adjust the valve bridge and then adjust the valve lash.Valve Bridge Adjustment
Table 2
Required Tools Qty
1U-7133 Socket(1) 1
5P-0333 Wrench(1) 1
(1) To facilitate the use of a torque wrench, weld the jaw of the 5P-0333 Wrench around the top end of the 1U-7133 Socket.The valve bridge must be adjusted before the valve lash is adjusted. The valve bridge can be adjusted without removal of the rocker arms and of the shafts. The valves must be fully closed. To determine whether the valves are fully closed, refer to Testing and Adjusting, "Finding the Top Center Position for the No. 1 Cylinder" and Testing and Adjusting, "Crankshaft Position for Valve Lash Setting".Note: If the cylinder head is disassembled, keep the bridges with the respective valves. Check that the bridge dowels are installed to the correct height. Lubricate the bridge dowel, the bore for the bridge dowel, and the top contact surface of the bridge. Install the bridge on the dowel.Use the following procedure to adjust the valve bridges:
Illustration 1 g03794212
(1) Valve cover
(2) Rocker arm
(3) Valve bridge
(4) Adjusting screw
(5) Locknut
Remove valve cover (1).
Loosen the locknut (5) for adjusting screw (4). Loosen the adjusting screw for several turns.
Press straight down on rocker arm (2) at the point of contact for valve bridge (3). Turn adjusting screw (4) clockwise until the screw just contacts the valve stem.
Tighten adjusting screw (4) for an additional 45 5 degrees to straighten the valve bridge onto the dowel.
Illustration 2 g00801873
Tightening the locknut
(A) 1U-7133 Socket and 5P-0333 Wrench
Fit the 5P-0333 Wrench and 1U-7133 Socket (A) over locknut (5). Insert a screwdriver through the socket and hold adjusting screw (4) in position. Fit a torque wrench onto 5P-0333 Wrench (A) and tighten the locknut to a torque of 100 15 N m (75 11 lb ft).
Ensure that the valve lash is correct.Valve Lash Adjustment
Table 3
Required Tools Qty
4C-6593 Adjustment Tool(1) 1
6V-3075 Dial Indicator(1) 1
8S-3675 Indicator Contact Point(1) 1
1U-7133 Socket(2) 1
5P-0333 Wrench(2) 1
(1) Insert the contact point into the dial indicator. Insert the dial indicator into the adjustment tool. Tighten the retaining screw finger tight.
(2) To facilitate the use of a torque wrench, weld the jaw of the 5P-0333 Wrench around the top end of the 1U-7133 Socket.
Put the No. 1 piston at the Top Center position. Refer to Testing and Adjusting, "Finding the Top Center Position for the No. 1 Cylinder" and Testing and Adjusting, "Crankshaft Position for Valve Lash Setting". Work on the appropriate cylinders.
Before you perform any adjustments, use a soft hammer to lightly tap each rocker arm at top of the adjusting screw. This will ensure that the lifter roller is seated against the camshaft.
Illustration 3 g00801887
(A) 4C-6593 Adjustment Tool
(1) Locknut
(2) Adjusting screw
Install 4C-6593 Adjustment Tool (A) on the rocker base. Thread the adjustment tool into the hole that is nearest to the end of the rocker arm. Position the contact point of the dial indicator over the flat area on the end of the rocker arm. Tighten the knob. Rotate the dial indicator so the dial indicator can be easily read. Ensure that the tool is rigid and that the point of the dial indicator moves freely.
Loosen locknut (1). Turn adjusting screw (2) clockwise until resistance is felt. Slightly turn the adjusting screw in the counterclockwise direction in order to obtain a valve lash of zero. The valves must be fully closed.
Zero the dial indicator.