SEAT Workshop Service and Repair Manuals

Oil sump, oil pump, balance shaft assembly: component overview

1 -

Seal

q

Replace

2 -	Oil drain plug

q

30 Nm

3 -

Oil sump

q	removing and fitting → Chapter

4 -

Bolt

q

9 Nm

5 -	Intake conduit

q	Clean strainer if soiled.

6 -

O ring

q

Replace

7 -

Oil pump:

q	removing and fitting → Chapter

q	Before installing, check that the two dowel sleeves for centring oil pump are fitted onto balance shaft assembly

8 -	Oil pump drive shaft

9 -

Circlip

q	Must fit securely in groove

q	A damaged or excessively widened securing ring must be replaced.

10 -	Spur gear for balance shaft

11 -

Bolt

q

Replace

q	20 Nm ± +90°

12 -	Thrust washer

q	For idler gear

q

Replace

q	Installation position → Fig.

q	When installing the idler gear,it must be secured with grease on the balancing module

13 -	Idler gear

q

Replace

q	To achieve the correct backlash a suitably thick coating is already applied to the new idler gear; the required clearance is achieved as the coating is worn down

q	On idler gears with coating applied to the teeth on parts of the circumference only, a white dot indicates the correct installation position

q	If there is no white dot, the complete circumference of the idler gear is coated

q	Fitting position: Part No. must be visible

q	Make sure thrust washer is properly seated → Fig.

14 -

Bolt

q

Replace

q	90 Nm ± +90°

15 -

Hub

q	For idler gear

q

Replace

16 -	Crankshaft gear

17 -	Balancer shaft module

q	Removing → Chapter

q	Re-installing "old" balance shaft assembly → Chapter

q	Installing new balance shaft assembly → Chapter

q	Before installing, check that the two dowel sleeves for centring balance shaft assembly are fitted on cylinder block

18 -

Bolt

q

Replace

q	Tightening torque and sequence → Fig.

19 -	Guide sleeve

20 -

Bolt

q

9 Nm

21 -	Oil suction line

22 -

Bolt

q

10 Nm

23 -

Ring seal

q

Replace

24 -	Oil level and oil temperature sender -G266-

q	removing and fitting → Chapter

25 -

Bolt

q	Self-locking

q

Replace

q

9 Nm

26 -

Bolt

q	Tightening torque and sequence → Fig.

Sump - tightening torque and sequence –  Renew bolts for sump. –  Tighten bolts in 3 stages and in diagonal sequence as follows:

1.  Tighten the bolts -1 … 20- to 5 Nm crossways. 2.  Tighten bolts -arrows- securing sump to gearbox to 40 Nm. 3.  Tighten bolts -1 ... 20- in diagonal sequence and in stages to 15 Nm.

Installation position of thrust washer   Caution Thrust washer can slip out of position behind idler gear. Make sure that thrust washer -A- does not slip out of the recesses in the balancing module -arrows- when fitting the idler gear. If this is neglected, the thrust washer can become trapped. If necessary, apply grease to hold washer on balancing module.

Balance shaft assembly - tightening torque and sequence

–  Replace the screw for the balancing module. –  Tighten the bolts -1 to 8- in 5 stages, as indicated in the following: 1.  Screw in bolts -1 ... 8- by hand until they make contact. 2.  Pre-tighten bolts in the sequence -1 ... 8- to 6 Nm. 3.  Tighten bolts -5- and -7- to 13 Nm. 4.  Tighten bolts -1, 2, 3, 4, 6, 8- to 20 Nm. 5.  Turn bolts -1 … 8- 90° further.

Oil jets and pressure release valve 1 -  Bolt with pressure relief valve - 27 Nm 2 -  Oil spray jet for cooling piston