Attention:
It is strictly forbidden to supply compressed air to the engine oil pan.
Damage to the sump can also cause various damage to the engine itself due to:
- blocking the oil intake;
- increasing the engine oil level above the maximum mark, which can cause the engine to run wild.
1. Remove the cylinder head from the engine.
2. Install the cylinder head on a special support (Mot. 1573).
3. Remove exhaust manifold (see chapter "Intake and exhaust system").
4. Loosen the bolt (2) camshaft sprockets using the timing gear lock (Mot. 799-01).
5. Remove the camshaft sprocket.
6. Unscrew the fixing nut and remove the tension roller (3).
7. Remove the camshaft seal from the timing drive side:
- Screw in the camshaft oil seal remover 30 x 42 x 7 (Mot. 1381) (2) into the gland.
- Tightening the bolt (3) camshaft oil seal remover 30 x 42 x 7 (Mot. 1381), remove the oil seal from the cylinder head.
8. Unscrew the fastening bolts (4) and remove the lifting eye.
9. Remove the cooling chamber (see chapter "Cooling system").
10. If equipped, remove sealing plug (5) camshaft.
11. Remove the spark plugs.
12. To turn away bolts of fastening of covers of bearings of a camshaft and to remove an axis of yokes from a head of the block of cylinders.
13. Mark the camshaft bearing caps with a marker.
14. Unscrew the bolts securing the camshaft bearing cap No. 5 (4).
15. Remove the camshaft bearing caps.
16. Remove the camshaft from the cylinder head.
17. Remove the valves from the cylinder head:
- Mark the installation position of each valve with a marker.
Note: Valve springs are compressed using a special tool (Mot. 1502).
- For proper valve spring compression, it is very important that the piston (2) fixtures (Mot. 1502) was centered on the valve stem (4). The valve disc must fit into the body (1) nests (3) valve spring compressors (Mot. 1502).
- Remove breadcrumbs with tweezers (5).
- Remove the valve disc, valve spring and valve itself.
Note:
There are two types of oil seals:
- oil seal with lower spring retaining washer (6),
- slinger cap without lower spring retaining washer (7).
18. Only slinger caps without lower spring retaining washer:
Note: Before removing the valve stem seal, it is important to note the size (H) old valve stem seals on the intake and exhaust sides (the installation size of the caps for inlet and outlet may differ).
- Install the valve to mark the installation dimension (H) an old slinger cap with the lower spring retaining washer using a slinger cap installer (Mot. 1759) or a kit for installing oil seals.
- Install mandrel (8) tools for pressing oil seals (Mot. 1759) on the oil cap.
Note: The inner diameter of the mandrel must be identical to the diameter of the valve so that the bottom of the mandrel covers the metal upper section of the valve stem seal.
- Install guide tube (9) above the mandrel so that the tube touches the cylinder block
- Insert sleeve (10) into the guide tube until it contacts the mandrel.
- Fix the sleeve with the fixing screw (11).
- Remove the guide tube and bushing assembly, being careful not to loosen the set screw.
- Remove valve.
19. Remove valve stem seals using special pliers (Mot. 1335) (12).