Removal
SPECIAL TOOLS REQUIRED
REMOVAL
1. Remove valve covers and engine front cover.
CAUTION: At no time, when the timing chain(s) are removed and the cylinder heads are installed, may the crankshaft and/or camshafts be rotated. Failure to follow these directions will result in valve and/or piston damage.
NOTE: Because this is not a free-wheeling engine, if it jumps time, there will be damage to the valves and/or pistons and will require the removal of the cylinder heads. The camshaft sprockets should only be disassembled from the camshafts when one of the components is to be replaced.
2. Remove crankshaft position sensor pulse wheel.
3. Rotate engine to No. 1 top dead center (TDC).
4. Install Cam Positioning Tool Adapters 303-413 and Cam Positioning Tool 303-380 on flats of camshaft at rear of cylinder head.
NOTE:
- This will prevent accidental rotation of the camshafts.
- Cam Positioning Tool Adapters 303-413 and Cam Positioning Tool 303-380 must be installed on camshaft to prevent camshaft from rotating.
5. Remove two bolts retaining RH timing chain tensioner to cylinder head and remove timing chain tensioner.
NOTE: If tensioners are to be reused, they must first be compressed and a suitable tool (lock pin) inserted into them for the tensioners to remain compressed. This will aid in reassembly.
6. Remove RH timing chain tensioner arm.
7. Remove two bolts retaining RH timing chain guide to cylinder head and remove timing chain guide.
8. Remove RH timing chain from camshaft sprocket and crankshaft sprocket.
9. Remove two bolts retaining LH timing chain tensioner to cylinder head and remove timing chain tensioner.
NOTE: Cam Positioning Tool Adapters 303-413 and Cam Positioning Tool 303-380 must be installed on camshaft to prevent camshaft From rotating.
10. Remove LH timing chain tensioner arm.
11. Remove two bolts retaining LH timing chain guide to cylinder head and remove tinning chain guide.
12. Remove LH timing chain from camshaft sprocket and crankshaft sprocket.
13. If necessary, remove camshaft sprockets and crankshaft sprockets.
CAUTION: Do not rotate crankshaft and/or camshafts or possible engine damage may occur.
14. Inspect the plastic running face on timing chain tensioner arms and timing chain guides. If worn or damaged, remove and clean oil pan and oil pump screen cover and tube.