Question about 1998 Saturn SL
Timing Chain and Sprockets
REMOVAL & INSTALLATION
Fig. 1: At 90 degrees past TDC, the crankshaft sprocket timing
mark and keyway will align with the main bearing cap split line
Fig. 2: Exploded view of the timing chain and sprocket
assembly - SOHC engine
Fig. 3: Insert the timing pin to ensure that the camshaft is at
No. 1 TDC - SOHC engine
Fig. 4: When the camshaft is at TDC, rotate the crankshaft
counterclockwise 90 degrees to achieve TDC
dont no how to set - 84193103.giftp://i.fixya.net/uploads/images/84193103.gif" alt="84193103.gif" class="h_mi" />
NOTE: During timing chain and sprocket removal, position the
crankshaft 90 degrees past Top Dead Center (TDC) to make sure the pistons will
not contact the valves upon assembly.
crankshaft sprocket and keyway align with the main bearing cap split line.
to hold the camshaft. Then remove the timing chain and camshaft sprocket. Remove
the crankshaft sprocket, if necessary.
chain, it should be no more than 23.15 in. (588mm). Inspect the chain guides for
wear or cracks and the timing sprockets for teeth or key wear. Replace
components as necessary.
crankshaft keyway should be at 3 o'clock aligned with the main bearing cap split
line to prevent piston and valve damage.
letters FRT on the sprockets face forward, away from the cylinder block. Use the
wrench flats provided on the camshafts to hold the shaft and tighten the bolts
to 75 ft. lbs. (102 Nm).
until the dowel pins are at 12 o'clock. Install a 1?6 in. drill bit
into the hole in the sprocket about 9 o'clock.
counterclockwise 90 degree up to No. 1 TDC (keyway and sprocket timing mark at
12 o'clock, in alignment with the block timing mark).
camshaft sprockets so 2 silver link plates align with the reference marks on the
camshaft sprockets and another 2 plates align with the downward tooth (at 6
o'clock position) on the crankshaft sprocket. Excess chain slack should be
located on the tensioner side of the cylinder block.
mark at 12 o'clock and that the timing pins are installed in the holes at about
the 9 o'clock position. Remove the timing pins from the camshaft sprockets.
the water pump. Tighten the bolts to 21 ft. lbs. (28 Nm) and verify the chain is
snug against the guide.
and head. Tighten the bolt to 19 ft. lbs. (26 Nm) and verify the guide pivots
guide, then tighten the retaining bolts to 124 inch lbs. (14 Nm).
31 drill bit inserted in the alignment hole at the lower front of the component.
Install the tensioner and tighten the bolts to 14 ft. lbs. (19 Nm), then remove
the drill bit.
remove all timing pins.
Fig. 5: Rotate the crankshaft clockwise until the timing mark
on the crankshaft sprocket and keyway align with the main bearing cap spdont no how to set - 89563pb1.jpg />
Fig. 6: Loosen the timing dont no how to set - 89563pb4.jpgner mounting bolt . . .
Fig.dont no how to set - 89563pb7.jpgd remove the tensioner from the engine block
Fig. 8: Retract the tensioner plunger and pin the ratchet lever
with a 1
in. (3.18mm) drill bit inserted in the alignment hole
dont no how to set - 89563pb8.jpg />
Fig. 9: Remove the mounting fasteners from both timing guides .
Fig. 10: . . . and remove the timing guides from the engine
to hold the camshaft
Fig. 12: Remove the timing chain and camshaft sprockets
Fig. 13: Insert the timing pins to verify that the camshafts
are at TDC
Fig. 14: Make sure that the silver linkdont no how to set - prev.gifand reference
marks are all in alignment as shown
Posted on Oct 07, 2010
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Posted on Jan 02, 2017
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