Steps 91-107

91. Collapse the LH secondary timing chain tensioner and install a pin to lock the piston.





92. Remove the LH VCT unit, exhaust camshaft sprocket and timing chain as an assembly.
93. Remove the 2 bolts and the LH secondary timing chain tensioner.





94. Collapse the RH secondary timing chain tensioner and install a pin to lock the piston.





95. Remove the RH VCT unit, exhaust camshaft sprocket and timing chain as an assembly.
96. Remove the 2 bolts and the RH secondary timing chain tensioner.





97. Remove the special tool.





98. CAUTION: Record the camshaft bearing cap locations. The camshaft bearing caps are positional and must be installed in their original locations and orientation or engine damage can occur.

Remove the LH camshaft bearing caps.
^ Remove the bolts.
^ Remove the LH camshaft bearing caps.





99. Remove the LH camshafts.





100. CAUTION: Record the camshaft bearing cap locations. The camshaft bearing caps are positional and must be installed in their original locations and orientation or engine damage can occur.

Remove the RH camshaft bearing caps.
^ Remove the bolts.
^ Remove the RH camshaft bearing caps.





101. Remove the RH camshafts.

102. CAUTION: Do not use any means of marking the shims other than a permanent type marker. Any scratches or paint on the shims can result in incorrect lash adjustments and severe engine damage.

CAUTION: Record the shim and bucket tappet location. The shim and bucket tappet are positional and if installed in the incorrect location, engine damage can occur.

Record the location of the valve tappets.
^ Remove the valve tappets.





103. CAUTION: The cylinder head must be cool before removing it from the engine. Cylinder head warpage can result if a warm or hot cylinder head is removed.

CAUTION: Place clean shop towels over exposed engine cavities. Carefully remove the towels so foreign material is not dropped into the engine.

CAUTION: The cylinder head bolts must be discarded and new bolts installed. They are tighten to yield designed and cannot be reused.

CAUTION: Aluminum surfaces are soft and can be scratched easily. Never place the cylinder head gasket surface, unprotected, on a bench surface.

NOTE: RH shown, LH similar.

Remove the RH and LH cylinder head end bolts.
^ Discard the bolts.





104. Remove and discard the bolts from both cylinder heads in the sequence shown.
^ Remove the cylinder heads.
^ Discard the gaskets.

105. CAUTION: Do not use metal scrapers, wire brushes, power abrasive discs or other abrasive means to clean the sealing surfaces. These tools cause scratches and gouges, which make leak paths. Use a plastic scraping tool to remove all traces of sealant.

CAUTION: Observe all warnings or cautions and follow all application directions contained on the packaging of the silicone gasket remover and the metal surface prep.

NOTE: If there is no residual gasket material present, metal surface prep can be used to clean and prepare the surfaces.

Clean the cylinder head to cylinder block mating surfaces of both the cylinder head and the cylinder block.
1 Remove any large deposits of silicone or gasket material with a plastic scraper.
2 Apply silicone gasket remover, following package directions, and allow to set for several minutes.
3 Remove the silicone gasket remover with a plastic scraper. A second application of silicone gasket remover may be required if residual traces of silicone or gasket material remain.
4 Apply metal surface prep, following package directions, to remove any remaining traces of oil or coolant, and to prepare the surfaces to bond with the new gasket. Do not attempt to make the metal shiny. Some staining of the metal surfaces is normal.

106. NOTE: The straightedge used must be flat within 0.0051 mm (0.0002 inch) per foot of tool length.Support the cylinder head on a bench with the head gasket side up. Inspect all areas of the deck face with a straightedge, paying particular attention to the oil pressure feed area. The cylinder head must not have depressions deeper than 0.0254 mm (0.001 inch) across a 38.1 mm (1.5 inch) square area, or scratches more than 0.0254 mm (0.001 inch).





107. Remove the bolts and the knock sensor.