Oil pump - Overhaul (page 2 of 2)

ENGINE - K SERIES KV6

OVERHAUL 12-3-105

3. Remove oil pressure relief valve plug.

Note: If a hexagonal plug and sealing washer 
are fitted, discard washer.

4. Remove spring and valve.
5. Check that valve and bore are free from scoring 

and corrosion.

Note: Light corrosion may be removed using 
grade 600 emery cloth soaked in engine oil.

6. Check free length of spring.

 + 

 GENERAL DATA, Engine - KV6 

Petrol.

7. Check that valve slides freely in bore.

CAUTION: If valve is scored, renew relief 
valve as an assembly. If valve bore is 
scored, renew oil pump as an assembly.

Reassembly

1. Clean cover plate and mating face of cylinder 

block; ensure bolt holes are clean and dry.

2. Clean running surface on crankshaft.
3. Remove all traces of sealant from relief valve 

plug, Torx screws and tapped holes in pump 
body.

CAUTION: Do not use a tap.

4. Lubricate relief valve, spring and bore with 

clean engine oil.

5. Fit relief valve and spring.
6. If a hexagonal plug and sealing washer were 

fitted, fit new sealing washer to plug. 

7. Apply sealant, Part No. STC 50552 to plug 

threads; fit plug and tighten to 25 Nm (18 lbf.ft).

8. Lubricate pump rotors and recess with clean 

engine oil.

9. Fit inner and outer rotors ensuring that 

identification mark on outer rotor is facing 
outwards and that reference marks are aligned.

10. Lubricate new cover plate sealing ring with 

clean engine oil.

11. Fit cover plate seal and cover plate.
12. Apply sealant, Part No. STC 50552 to threads 

of Torx screws, fit and tighten screws.

13. Check that pump rotates freely.

Refit

1. Fit oil pump gasket.

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 ENGINE - K SERIES KV6, REPAIRS, 

Gasket - oil pump.