Withdrawal
1. Before removing the rocker arm assembly and their shafts, install special tools (09246 - to prevent the valve clearance adjusters from falling out.
Note. To prevent errors during subsequent installation, keep the rocker and valve clearance adjusters in an order that clearly separates them between intake and exhaust.
Valve clearance adjuster
1. Check the ease of movement of the automatic lash adjuster by inserting a thin wire through the air outlet into the rocker arm and applying slight pressure to the lash adjuster ball.
2. While holding the ball down, rotate the rocker up and down to check for ease of movement. If there is no movement, replace the automatic lash adjuster.
Camshaft
1. Replace the camshaft with significant wear or damage to the following areas.
- 1) Shakes.
- 2) Working protrusions of the cams.
- 3) Ignition distributor drive gear teeth.
- 4) Surface in contact with seal.
2. With significant wear on the camshaft bearings, replace the cylinder head.
3. If the lip of the seal is worn, replace it.
Jaw height
- Rated - 41.15-41.35 mm
- Limit - 40.65 mm
Installation
1. Adjust the automatic valve lash adjuster in clean diesel fuel.
2. Using a thin wire, lightly press the ball down, then move the plunger up and down 4 or 5 times to release air.
3. After applying engine oil to the necks and cams of the camshaft, install it in the cylinder head.
4. Insert the valve clearance adjusters, being careful not to spill the diesel fuel in them. Next, use a special tool to prevent them from falling out during installation.
5. Apply a minimum amount of sealant in 4 places (see picture).
Note. The sealing material must not come into contact with the surfaces of the cylinder head in contact with the camshaft journals.
- Sealing material - Threebond #1324 or equivalent
6. Install rocker shafts (A) And (IN) so that the marks on the bearing caps point in the same direction as the corresponding mark on the cylinder head.
Note. Marks in the form of an arrow on the rocker shafts (A) And (IN) directed towards each other.
7. Torque tighten the bearing cap bolts. Remove the special tools installed on the valve clearance adjuster.
8. Apply a small amount of oil to the surface of the camshaft in contact with the lip of the oil seal. With a special tool (09221-33000) install the seal.
9. Using a special tool (09221-21000), install the O-ring.
10. After installing the valve cover, apply sealing material to the O-ring and to the top surface of the cylinder head.
- Sealing material: Valve cover - Threebond #1212D or equivalent
Note. Make sure the valve cover bolts are tightened to the correct torque. When tightening the bolts, the cover is deformed, which can cause oil leakage.
- Tightening torque: Valve cover bolt - 8-10 Nm.
11. Using special tools (09231 -33200, 09231-33300), tighten the camshaft sprocket bolt to the specified torque.
- Tightening torque: Camshaft pulley bolt - 80-100 Nm.