Primary Camshaft Drive Chain and Sprockets Replacement

Primary Camshaft Drive Chain and Sprockets Replacement

Special Tools

J 39946 Crankshaft Socket

Removal Procedure




1. Remove the oil pump. Refer to Oil Pump Replacement (Oil Pump Replacement).
2. Remove the crankshaft sprocket to oil pump drive friction washer.




3. Align the primary timing marks (1) using the J 39946 .
4. Remove the secondary camshaft drive chains. Refer to Secondary Camshaft Drive Chain Replacement - Left Side (Secondary Camshaft Drive Chain Replacement - Left) and Secondary Camshaft Drive Chain Replacement - Right Side (Secondary Camshaft Drive Chain Replacement - Right).
5. Remove the primary drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Replacement (Primary Camshaft Drive Chain Tensioner Replacement).




6. Remove the oil outlet tube (4). Refer to Oil Pump Outlet Tube Removal (Overhaul).




7. Remove the primary camshaft drive chain guide bolts and guide.




8. Remove the camshaft intermediate sprocket retaining bolt.




9. Remove the following as an assembly:

* The primary camshaft drive chain (3)
* The crankshaft sprocket
* The camshaft intermediate sprocket




10. Remove the crankshaft to crankshaft sprocket friction washer.
11. Clean and inspect the camshaft timing drive components. Refer to Camshaft Timing Drive Components Cleaning and Inspection ().

Installation Procedure





Note: Ensure the proper friction washer is installed in the correct position.

1. Select the crankshaft to crankshaft sprocket friction washer (1). The outer diameter is 63.5 mm (2.5000 in), an inner diameter of 45.25 mm (1.7815 in) and a notch to clear the crankshaft pin.




2. Install the crankshaft to crankshaft sprocket friction washer.




3. Align the timing marks (1) of the camshaft intermediate and crankshaft sprockets. The marks should be aligned vertically in the installed position.
4. Install the primary camshaft drive chain on the drive sprockets.




5. Ensure the number one piston is at Top Dead Center (TDC) and the crankshaft pin is approximately at the 1 o'clock position. Use the J 39946 to rotate the crankshaft as necessary.
6. Install the following as an assembly:

* The primary camshaft drive chain (3)
* The crankshaft sprocket
* The camshaft intermediate sprocket





Caution: Refer to Fastener Caution (Fastener Caution).

7. Install the camshaft intermediate sprocket retaining bolt and tighten to 60 Nm (44 lb ft).




8. Install the primary drive chain guide.
9. Install the primary drive chain guide bolts and tighten to 25 Nm (18 lb ft).
10. Install the primary drive chain tensioner. Refer to Primary Camshaft Drive Chain Tensioner Replacement (Primary Camshaft Drive Chain Tensioner Replacement).




11. Install the oil outlet tube (4) and bolts then tighten to 10 Nm (89 lb in). Refer to Oil Pump Outlet Tube Installation (Overhaul).
12. Install the secondary camshaft drive chains. Refer to Secondary Camshaft Drive Chain Replacement - Left Side (Secondary Camshaft Drive Chain Replacement - Left) and Secondary Camshaft Drive Chain Replacement - Right Side (Secondary Camshaft Drive Chain Replacement - Right).
13. Remove the pin from the primary timing chain tensioner release lever.




14. Ensure the primary timing marks (1) are aligned vertically.




15. Install the crankshaft sprocket to oil pump drive friction washer. The crankshaft sprocket to oil pump drive friction washer outer diameter is 62.0 mm (2.4410 mm) and the inner diameter is 45.25 mm (1.7815 in).
16. Install the oil pump. Refer to Oil Pump Replacement (Oil Pump Replacement).