Timing Chain: Overview Infiniti Q45 II

Note. Engine must be removed from vehicle for timing chain removal. See ENGINE.

Scheme 8

1. Remove engine assembly. See ENGINE. Remove engine mounts, generator, A/C compressor and exhaust manifolds. Mount engine on engine stand.
2. Remove intake manifold collector. Remove fuel tube assembly with injectors. DO NOT disassemble fuel hose. Remove intake manifold and valve covers. See «CYLINDER HEAD»(ref-49502-S03549378772001011500000).
3. Rotate engine so No. 1 cylinder is at TDC on compression stroke. No. 1 cylinder is front cylinder on left side when viewed from rear of engine. Ensure TDC timing mark on crankshaft pulley is aligned with pointer on front cover. Using puller, remove crankshaft pulley.
4. Remove camshaft position sensor from left timing chain uppercover. Remove left and right timing chain upper bolts in reverse order of tightening sequence. (Scheme 8) Remove timing chain upper covers. Remove upper chain tensioner. NOTE: After removing upper timing chain tensioners, press tensioner foot inward and insert.04" (1 mm) pin into hole in tensioner frame.
5. Apply paint to upper timing chain and camshaft sprockets for reassembly reference. While holding camshaft with wrench, remove camshaft sprockets.
6. Remove right and left tensioner covers from timing chain lower cover. On both timing chain tensioners, press tensioner foot inward and insert.04" (1 mm) pin into hole in tensioner frame.
7. Remove upper timing chain guides. Remove cylinder head assembly. See «CYLINDER HEAD»(ref-49502-S03549378772001011500000). Remove upper timing chain and idler sprocket.
8. Remove timing chain cover bolts in reverse order of tightening sequence. (Scheme 9) Remove lower timing chain cover. Remove lower timing chain tensioner. Remove oil pump drive chain. Remove lower timing chain guide and lower timing chain slack guide. Remove lower timing chain with crankshaft sprocket.

Scheme 9