Withdrawal
cylinder head installed. Remove toothed belt. Remove locking pin -3359-. Remove bolts -1- and remove camshaft sprocket from hub.
![](https://www.audimanual.ru/img/others/0744.jpg)
Loosen hub clamp -1- by supporting it with support -T10051-. Loosen the bolt about 2 turns.
![](https://www.audimanual.ru/img/others/0745.jpg)
Attach puller -T10052- to hub and screw in bolts -1-. Remove the hub from the camshaft, holding the hexagon of the puller with a 30 wrench and screwing in the bolt -2-. Remove cylinder head cover.
![](https://www.audimanual.ru/img/others/0746.jpg)
Unscrew first the outer and then the inner bolts of the balancer axle, and remove it. Remove tandem pump. Remove covers "2" And "3". Unscrew caps crosswise "1" and 4"
Instruction. bearing cap "4" marked cooker bearing cover "5". Ensure that the camshaft bearing shells are not mixed up. Use a waterproof marker on the back of the bushings to mark the location of the bushings on the camshaft.
Take out the distributor.
Installation
![](https://www.audimanual.ru/img/others/0747.jpg)
Install in reverse order, paying attention to the following: The crankshaft gear must be locked using the crankshaft stop -T10050-. Markings on toothed belt sprocket and crankshaft stop -arrow- must be opposite each other. In this case, the pin of the stopper must enter the hole in the seal. flange.
Instruction. Ensure that used camshaft bearing shells are not mixed up (take into account the marking). When installing the camshaft, make sure that the retaining tabs of the bushings in the bearing caps and cylinder head are properly seated.
![](https://www.audimanual.ru/img/others/0748.jpg)
Lubricate the running surfaces of the camshaft with engine oil. Bring the camshaft to TDC position of the first cylinder: the lobes of the first camshaft cylinder must point upwards -arrows-. Cross tighten caps "2" And "3".
![](https://www.audimanual.ru/img/others/0749.jpg)
Apply to bearing caps "1" And "4" a thin uniform layer of sealant on the surface. Ensure that sealant does not get into grooves -arrows- or onto other surfaces. Install and tighten bearing caps "1" And "4". bearing cap "4" must be flush with the outer edge of the cylinder head, otherwise the tightness of the tandem pump may be lost. Install the camshaft seal. Install the balancer axle and tighten first the inner and then the outer bolts of the axle in several stages. Push the hub onto the camshaft. Tighten bolt, holding it with support -T10051-. Install the camshaft gear onto the hub. The toothed segment -arrow- on the camshaft sprocket must point upwards.
![](https://www.audimanual.ru/img/others/0750.jpg)
Do not fully screw in bolts -1-. Secure camshaft hub with locking pin -3359-. Install toothed belt (adjust valve timing). Install tandem pump. If the balance shaft or ball head bolts and adjusting bolts have been replaced, the unit injectors must be adjusted. Install cylinder head cover.
Instruction. After installing the camshaft, the engine must not be started for approximately 30 minutes. Hydraulic tappets must be deposited (otherwise the valves will come into contact with the pistons). After working on the valve train, rotate the engine at least 2 turns by hand to make sure that no valve is in contact with the piston.
Tightening torques
- Bearing cap to cylinder head: 8 Nm + 90°1)
- Balancer axle to cylinder head: 20 Nm + 90°1)
- Hub to camshaft: 100 Nm
1) Replace bolts
Valve sizes
![](https://www.audimanual.ru/img/others/0751.jpg)
Size | Inlet valve | Exhaust valve |
a mm | 35.95 | 31,45 |
b mm | 6,980 | 6,956 |
s mm | 89,95 | 89,95 |
α° | 45 | 45 |
Instruction. Valves must not be processed. Only lapping is allowed.
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