Specifications

(3) Align notch in sprocket with alignment pin in
crankshaft.
(4) Using crankshaft sprocket installer VM.1029
press on the new sprocket.
(5) Remove alignment pin.
(6) Install vacuum pump.
CAUTION: The vacuum pump must be centered in
the block and tighten with two bolts. Ensure that
the pump spins freely. If vacuum pump drags or
does not spin freely loosen bolts and perform pro-
cedures again.
(7) Install timing chain.
(8) Install oil pump.
(9) Install oil pump drive gear on crankshaft.
(10) Install timing chain cover.
(11) Install vibration damper.
CAUTION: Correct torque on the crankshaft vibra-
tion damper nut is important or engine damage can
occur.
HYDRAULIC TENSIONER
Refer to Timing Chain Removal and Installation in
this section.
CAMSHAFT
REMOVAL
(1) To service camshaft (Fig. 50) the engine must
be removed from vehicle.
(2) Remove valve cover. Refer to valve cover
removal in this section.
(3) Remove rocker arms and push rods. Identify
push rods to ensure installation in there original
location.
(4) Remove cylinder head. Refer to cylinder head
removal in this section.
(5) Remove hydraulic tappets. Refer to tappet
removal in this section.
(6) Remove vibration damper. Refer to vibration
damper removal in this section.
(7) Remove power steering pulley.
(8) Remove pump shaft support bracket.
(9) Remove timing chain cover. Refer to timing
chain cover removal in this section.
(10) Remove timing chain. Refer to removal proce-
dure in this section.
(11) Install camshaft sprocket holding tool
VM.1031 to lock the camshaft sprocket in place.
(12) Remove camshaft sprocket bolt and remove
sprocket (Fig. 50).
(13) Remove locating plate, and reinstall sprocket
and bolt finger tight.
(14) Remove camshaft.
INSTALLATION
(1) Coat the camshaft journals with clean engine
oil and carefully install the camshaft.
(2) Install camshaft locating plate alignment tool
on block then install locating plate (Fig. 51).
(3) Tighten locating bolt to 11 N·m ( 96 in. lbs.)
torque. Be sure to align the timing marks as shown
in timing chain installation procedure.
(4) Install camshaft sprocket center bolt and
tighten to 19.6 N·m + 60° (170 in. lbs. + 60°). Remove
sprocket holding tool.
(5) Install hydraulic tappets and retaining yokes.
(6) Install cylinder heads.
(7) Push rods, and rocker arm assemblies. In there
original location.
(8) Install valve cover.
(9) Install Timing case cover.
Fig. 50 Camshaft Assembly
Fig. 51 Locating Plate Alignment
NS/GS ENGINE 9 - 59
REMOVAL AND INSTALLATION (Continued)