Replacing the camshafts and sealing the cylinder head cover of the duratec-v15 engine with a volume of 2.5 liters

Pic. 5.39. Duratec-V15 engine with a volume of 2.5 liters with elements of the variable valve timing system: 1 - cover of the gas distribution mechanism drive; 2 – a cover of a head of the block of cylinders; 3 - intake camshaft position sensor; 4 - exhaust camshaft position sensor; 5 - solenoid valve for adjusting the position of the intake camshaft; 6 - solenoid valve for adjusting the position of the exhaust camshaft; 7 - mechanism for adjusting the position of the exhaust camshaft; 8 - mechanism for adjusting the position of the intake camshaft; 9 - intermediate pulley of the timing belt; 10 - toothed pulley of the timing belt on the crankshaft; 11 - timing belt tensioner; 12 - toothed pulley of the coolant pump; 13 - timing belt drive.

Pic. 5.46. The procedure for loosening the bolts of the cylinder head cover.

You will need: all the tools needed to remove the battery, cylinder head cover, timing belt.

Camshafts are replaced in the following cases: – The pressure in the engine lubrication system has dropped; - valve knock at normal clearances in the valve drive mechanism. Caused by increased wear of the camshaft cams due to the use of low-quality engine oil or damage to the oil filter.

1. Disconnect a wire from the minus plug of the storage battery.

2. Remove the solenoid valves of the VCT system by disconnecting the wiring harness blocks from them and unscrewing one bolt securing the VCT system caliper.

3. Remove the camshaft position sensors by disconnecting the wiring harness blocks from them and unscrewing one bolt of fastening to the cylinder head cover. Remove the ignition coils and spark plugs.

4. Remove the timing belt (see Duratec-v15 2.5L Timing Belt Replacement).

5. Remove VCT controls 7 and 8 (see fig. 5.39) exhaust and intake camshafts.

6. Remove a cover of a head of the block of cylinders, having turned out forty six bolts of fastening of a cover of a head of the block of cylinders in the order shown in fig. 5.46.

7. Turn away bolts of fastening of covers of bearings of camshafts and remove covers.

8. Remove camshafts.

9. Examine camshafts.

If there are signs of seizing, overheating, deep scratches or wear in the form of a cut on the working surfaces of the cams, replace the shafts.

10. Lubricate the camshaft bearings with clean engine oil and install the camshafts.


11. Clean the grooves of the cylinder head cover and the mating surface of the block head from the remnants of the old seal.

12. Apply sealant-gasket to the surface of the cylinder head (FORD WSE-M4G323-A4 or equivalent) roller with a diameter of 3–4 mm, and the line for applying the sealant-gasket should run from the inside of the mounting holes.

13. No later than 10 minutes after applying the sealant, install the cylinder head cover.

14. Bolts of fastening of a cover tighten the moment of 17 Н·м in an order, the return shown on fig. 5.46.

15. Install all removed parts in the reverse order of removal.

16. Adjust the tension of the timing belt (see Duratec-v15 2.5L Timing Belt Replacement).