Exhaust Camshaft and Components Installation
WARNING: This page is about a different variant/trim than selected.
- Install the hydraulic lash adjusters (1) into their bores in the cylinder head. Apply lubricant to the lash adjusters, refer to Adhesives, Fluids, Lubricants, and Sealers .
- Lubricate the valve tips (1), refer to Adhesives, Fluids, Lubricants, and Sealers .
- Position the roller followers (1) on the tip of the valve stem and on the lash adjuster. Apply lubricant to the followers, refer to Adhesives, Fluids, Lubricants, and Sealers .
- When installing the camshafts, ensure the exhaust camshaft notch is in the 7 o'clock position (1). The number 1 piston should be at top dead center (TDC), crankshaft key at 12 o'clock.
- Set the exhaust camshaft (1) on top of the roller followers in the camshaft bearing journals. Lubricate the camshaft, refer to Adhesives, Fluids, Lubricants, and Sealers .
- Rotate the oil seal in the groove of the number one camshaft journal so the split line (1) is at approximately the 12 o'clock position before installing the camshaft caps.
- Install the exhaust camshaft with the notch on the front (1) at approximately the 7 o'clock position.
- Install the camshaft caps (1) and hand start the camshaft cap bolts (2).
- Lubricate and tighten the camshaft cap bolts in increments of 3 turns until they are seated. Tighten the camshaft cap bolts to 10 N.m (89 lb in).
- Ensure that all sealing material has been removed from the components, and the sealing surfaces are clean and free of contamination prior to applying the sealer.
- Install and align the rear cap within 20 minutes of applying the sealer.
- Ensure proper use of room temperature vulcanizing (RTV) sealant.
Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
- Apply a 2.5 mm bead of sealer to the cylinder head at the exhaust camshaft bearing rear cap mating surface. Refer to Adhesives, Fluids, Lubricants, and Sealers .
- Install the exhaust camshaft bearing rear cap and bolts.
- Tighten the cap bolts evenly to 5 N.m (44 lb in).
- Tighten the cap bolts evenly to 10 N.m (89 lb in).
- Back the cap bolts out 120 degrees.
- Tighten the cap bolts evenly a final pass to 10 N.m (89 lb in).
- Remove all excess sealing material from the power brake booster pump bore (1), and ensure the bore and gasket sealing surface is clean and free of debris. Do not allow any excess sealing material to remain within the cylinder head or on any sealing surface.
NOTE:
Used roller followers must be returned to the original position on the camshaft. If the camshaft is being replaced, the roller followers actuated by the camshaft must also be replaced.
NOTE:
The engine is timed top dead center exhaust stroke.
CAUTION:
Refer to Fastener Caution .
NOTE:
It is critical during installation to ensure the bearing rear cap and cylinder head alignment is correct and the mating surfaces are flush.
NOTE:
Apply the sealer to all locations centrally locating the bead on the rail. Run bead to within 2.0 mm of the end points, dimension (a), as shown. Where the cap ends on the perimeter rail, extend bead approximately 2.0 mm beyond edge of cap.