Oil pressure relief valve (page 2 of 2)

ENGINE - K SERIES KV6

12-3-56 REPAIRS

7. Remove 4 nuts securing engine oil cooler to 

mounting bracket and position oil cooler aside.

8. Remove oil pressure relief valve plug nut.

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

9. Remove spring and valve.

Refit

1. Clean valve, spring and plug; remove all traces 

of sealant from threads in oil pressure relief 
valve bore and from threads of plug.

CAUTION: Do not use a tap.

2. Clean valve seating inside oil pump  housing.
3. Check that valve slides freely in bore and that 

valve and bore are free from scoring and 
corrosion.

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

4. Check free length of spring.

 + 

 GENERAL DATA, Engine - KV6 

Petrol.

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

threads.

Note: If a hexagonal head plug and sealing 
washer were fitted, fit new sealing washer to 
plug.

6. Fit valve, spring and plug to oil pump housing. 

Tighten plug to 25 Nm (18 lbf.ft).

7. Fill canister of replacement oil filter with clean 

engine oil.

8. Lubricate new oil filter seal with clean engine oil 

and fit filter.

9. Position engine oil cooler to mounting bracket, 

fit and tighten nuts to 25 Nm (18 lbf.ft).

10. Remove oil container from underneath of 

engine.

11. Fit splash shield and secure with bolts.
12. Fit RH road wheel and tighten nuts to 115 Nm 

(85 lbf.ft).

13. Fit underbelly panel.

 + 

 EXTERIOR FITTINGS, REPAIRS, 

Panel - underbelly.

14. Connect battery earth lead.
15. Check engine oil level, top-up if  necessary.

M12 7916