| Testinf the combustion chamber for tightness |
| Special tools and workshop equipment required |
| t
| Pressure hose -MP1-210 (VW 653/3)- (replace gasket ring with a spark plug gasket ring) |
| t
| Spark plug wrench -3122 B- |
| –
| Unscrew the spark plugs with spark plug wrench -3122 B-. |
| –
| Position piston of the relevant cylinder to top dead centre (TDC). |
| –
| Screw the pressure hose MP 1-210 into the spark plug thread. |
| –
| Connect pressure hose to compressed air. |
| –
| With the assistance of a second mechanic, lock the screw at the crankshaft on „top dead centre position“ in order to avoid the displacement of the piston after pressure build-up. |
| –
| Build up a pressure of approx. 0.3 MPa (3 bar) in the combustion chamber. |
| –
| Determine how the pressure escapes: |
| 1 - | Via the inlet valve(s) - the pressure enters the throttle valve. |
| 2 - | Via the outlet valve(s) - the pressure enters the exhaust system. |
| 3 - | Via the piston rings - the pressure enters the cylinder block. |
|
|
|
