Audi 100

1982-1990 of release

Repair and operation of the car

3.1.2.8. Gaps between cams of a cam-shaft and pushers of valves

GENERAL INFORMATION

Gaps between cams of a camshaft and pushers of valves (engines of the DR and DS models of release till September, 1985) regulate by means of adjusting washers which make from 3,0 to 4,25 mm thick with a step of 0,05 mm. Thickness is written on one of the parties of a washer. Gaps on the cold engine (at a temperature of cooling liquid (20±50) of °C have to be for inlet valves (0,20±0,05) of mm, for final (0,40±0,05) mm. It is necessary to regulate gaps after grinding in and polishing of valves after installation of a new camshaft. In these cases through 1000 km of run repeatedly check and if necessary regulate gaps in valves.

Adjustment

PERFORMANCE ORDER

1. To uncover heads of the block of cylinders.

2. To turn a cranked shaft so that camshaft cams on the checked cylinder were turned up. The probe to check a gap between a cam and a pusher and to write down the received result. In the same way to check gaps of valves on all other cylinders. Considering from the camshaft drive, valves No. 1, 3, 6, 8 – final, and valves No. 2, 4, 5, 7 – inlet.

3. If the gap exceeds admissible, it is necessary to replace an adjusting washer. For this purpose to install the piston in v.m.t. a compression step (both valves are closed), by means of the suitable tool to press and drown a pusher on so many that it was possible to remove an adjusting washer from it. On each pusher from above there are two cuts facilitating removal of a washer.

4. To measure the washer thickness necessary for installation of a nominal gap.

5. To establish new adjusting washers then to establish a cover of a head of the block of cylinders and the top cover of the drive of a camshaft with new laying.

6. If adjusting washers are not worn-out and are not damaged at removal, they can be reused.