Volkswagen Golf/Jetta 2 manual

Contact breaker point renewal and adjustment (Every 10 000 miles (15 000 km) or 12 months)
Routine maintenance and servicing / Contact breaker point renewal and adjustment (Every 10 000 miles (15 000 km) or 12 months)


Renewal
1 Disconnect the LT lead from the terminal block on the screening ring, then the earth strap spade connector on the distributor body.

2 Release the two retaining clips and withdraw the distributor cap, complete with screen ring, from the distributor.

3 On 1.05 and 1.3 litre engines, remove the screws and withdraw the bearing plate (see illustration).

16.3 Removing the bearing plate - 1.05 and 1.3 litre
16.3 Removing the bearing plate - 1.05 and 1.3 litre

4 Disconnect the moving contact LT lead from the terminal then remove the retaining screw and withdraw the contact breaker set from the distributor.

5 Wipe clean the contact breaker plate in the distributor and make sure that the contact surfaces of the new contact breaker set are clean. Lubricate the arm surface and moving contact pivot with a little multi-purpose grease. Use only a small amount, otherwise the contact points may become contaminated.

6 Fit the contact set on the baseplate and refit the retaining screw. Connect the LT lead to the terminal.

7 Refit the bearing plate and tighten the screws (where applicable).

8 Adjust the contact breaker points as follows.

Adjustment
9 Turn the engine with a spanner on the crankshaft pulley bolt until the moving contact point is fully open with its contact heel on the peak of one of the cam lobes.

10 Using a feeler blade, check that the gap between the two points is as specified. If not, loosen the fixed contact screw and reposition the fixed contact until the feeler blade is a firm sliding fit between the two points. In order to make a fine adjustment, slightly loosen the screw then position the screwdriver in the fixed contact notch and the two pips on the contact plate. With the gap adjusted, tighten the screw (see illustrations).

16.10a Checking contact breaker points gap
16.10a Checking contact breaker points gap

16.10b Adjusting contact breaker points gap
16.10b Adjusting contact breaker points gap

16.10c Two pips and notch (arrowed) for inserting screwdriver when adjusting
16.10c Two pips and notch (arrowed) for inserting screwdriver when adjusting contact breaker points gap

11 Using a dwell meter, check that the dwell angle of the contact points is as specified while spinning the engine on the starter. If not, readjust the points gap as necessary. Reduce the gap in order to increase the dwell angle, or increase the gap in order to reduce the dwell angle.

12 Clean the dust cover and rotor arm then refit them. Do not remove any metal from the rotor arm segment.

13 Wipe clean the distributor cap and make sure that the carbon brush moves freely against the tension of the spring. Clean the metal segments in the distributor cap but do not scrape away any metal, otherwise the HT spark at the spark plugs will be reduced. Also clean the HT leads and coil tower.

14 Refit the distributor cap and interference screen.

15 Start the engine and check that the dwell angle is as specified, both at idling and higher engine speeds. A decrease in dwell angle at high engine speeds indicates a weak spring on the moving contact points.

16 After making any adjustment to the contact breaker points, check and adjust the ignition timing.


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