Volkswagen Golf/Jetta 2 manual

Crankshaft and main bearings - refitting
Engine repair procedures - 1.6 and 1.8 litre 8 valve / Crankshaft and main bearings - refitting


Note: If it is difficult to rotate the crankshaft, check that the bearing shells are seated properly and that the bearing cap is in the correct way round. Rotation will only be difficult if something is incorrect and the fault must be found. Dirt on the back of a bearing shell is sometimes the cause of a tight main bearing.

1 If a new crankshaft is being fitted to automatic transmission models, the needle roller bearing supplied and fitted by the manufacturer will need to be removed from its aperture in the rear end of the crankshaft. It may already have been removed by the supplier, but check anyway.

2 Clean the crankcase recesses and bearing caps thoroughly and fit the bearing shells so that the tang on the bearing engages in the recess in the crankcase or bearing cap.

Ensure that the shells fitted to the crankcase have oil grooves and holes and that these align with the drillings in the bearing housings.

When fitting the bearing shells to the caps, note that bearing Nos. 1, 2 and 5 are plain shells whilst No. 4 has an oil groove.

3 The bearing shells of the centre bearing (No. 3) may either be flanged to act as thrustwashers, or may have separate thrustwashers. These should be fitted oil groove outwards. Fit the bearing shells so that the ends of the bearing are flush with the joint face (see illustrations).

30.3a Fitting flanged type centre main bearing into crankcase
30.3a Fitting flanged type centre main bearing into crankcase

30.3b Fitting alternative type centre main bearing into crankcase . . .
30.3b Fitting alternative type centre main bearing into crankcase . . .

30.3c . . . together with thrustwashers
30.3c . . . together with thrustwashers

30.3d Fitting flanged type centre main bearing to cap
30.3d Fitting flanged type centre main bearing to cap

30.3e Fitting centre bearing and separate thrustwashers to cap
30.3e Fitting centre bearing and separate thrustwashers to cap

30.3f Ensure that ends of bearing are flush with joint face
30.3f Ensure that ends of bearing are flush with joint face

4 Oil the bearings and journals then locate the crankshaft in the crankcase.

5 Fit the main bearing caps (with centre main bearing thrustwashers if applicable) in their correct positions (see illustration).

30.5 Fitting main bearing caps
30.5 Fitting main bearing caps

6 Fit the bolts to the bearing caps and tighten the bolts of the centre cap to the specified torque, then check that the crankshaft rotates freely.

7 Working out from the centre, tighten the remaining bearing caps in turn, checking that the crankshaft rotates freely after each bearing has been tightened.

8 Check that the endfloat of the crankshaft is within specifications by inserting feeler blades between the crankshaft and the centre bearing thrust face/washer while levering the crankshaft first in one direction and then in the other.

9 Lubricate the rear of the crankshaft and using a new gasket, install the rear oil seal and flange. Tighten the six bolts (see illustration).

30.9 Fitting crankshaft rear oil seal and flange
30.9 Fitting crankshaft rear oil seal and flange

10 Lubricate the front of the crankshaft and fit the front oil seal and flange with a new gasket. Tighten the bolts to the correct torque.


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