Camshaft - Installation

INSTALLATION

CAUTION: When the timing chain is removed and the cylinder heads are installed, DO NOT rotate the camshafts or crankshaft without first locating the proper crankshaft position. Failure to do so will result in valve and/or piston damage.

NOTE: The engine can be equipped with either conventional roller-type (early production) or silent type (late production) secondary timing chains.










1. For engines equipped with roller chains (early production), assemble camshaft chain on the cams ensuring that the plated links (1) are aligned with the timing dot (2) on the camshaft sprockets.





2. For engines equipped with silent chains (late production) assemble camshaft chain on the cams ensuring that the marked links (1) are aligned with the timing dot (2) on the camshaft sprockets.










3. If camshaft chain tensioner is already in the compressed and locked position, proceed to step four.
4. When the camshaft chain tensioner is removed, it is necessary to compress and lock the tensioner using the following procedures:
a. Place tensioner (1) into a soft jaw vise.
b. SLOWLY compress tensioner until fabricated lock pin (2) or the equivalent can be inserted into the locking holes.
c. Remove compressed and locked tensioner from the vise.
5. Insert the compressed and locked camshaft chain tensioner in-between the camshafts and chain.










6. For engines equipped with roller chains (early production), rotate the cams so that the plated links (1) and dots (2) are facing the 12:00 O'clock position.





7. For engines equipped with silent chains (late production), rotate the cams so that the marked links (1) and dots (2) are facing the 12:00 O'clock position.





8. Install cams to cylinder head. Verify that rocker arms are correctly seated and in proper positions.
9. Install camshaft bearing caps. Verify that bearing caps are installed in same position as removed.
10. Tighten cam bearing cap bolts gradually in sequence shown to 12 Nm (105 in. lbs.).
11. Install secondary chain tensioner bolts and tighten to 12 Nm (105 in. lbs.).
12. Remove locking pin from secondary tensioners.
13. Verify end play of camshafts are within specification Engine Specifications.
14. Install the primary timing chain Timing Chain & Sprockets - Installation.