Chevrolet Sonic Repair Manual: Valve Stem Oil Seal and Valve Spring Replacement
Special Tools
- 207649 Rod Hairpin Clips
- 547324 Flange Screws
- EN-840 Pliers / Remover
- EN-958 Installer
- EN-45059 Angle Meter
- EN-50717 Kit
- J-43649–2 Rods
For equivalent regional tools, refer to Special Tools.
- Removal Procedure
-
- Remove the spark plugs. Refer to Spark Plug Replacement.
- Remove the camshaft position actuator. Refer to Camshaft Sprocket Replacement.
- Remove both camshafts. Refer to Camshaft Replacement.
- Remove the valve lifter. Refer to Valve Lifter Replacement.
- For cylinder 1 and 4 set the crankshaft to TDC marking, cylinder number 1.
Use the crankshaft balancer bolt.
- For cylinder 2 and 3, set the crankshaft BDC (180 degrees from TDC marking).
Use the crankshaft balancer bolt.
Note:
Wheels must contact the ground.
- Shift to 1. gear (MT) or park position (AT) and apply the park brake.
- Valve Stem Oil Seal Removal
-
- Install the 2 EN-50717–1 stands (1) to the cylinder head and
fix them with the 547324 screws.
- Install the 2 J-43649-2 rods (2) and the EN-51717–2 compressor
(3) to the B-side of the EN-50717–1 stands. Secure the rods with
the 207649 clips then.
- Install an suitable air pressure adapter (4) to the spark plug hole.
- Apply air pressure to the corresponding cylinder.
- Position the EN-51717–2 compressor (3) so that its adapter proper
contacts the valve spring retainer and pretension the compressor.
Warning:
Valve springs can be tightly compressed. Use care
when removing the retainers and plugs. Personal injury could result.
- Apply pressure to the EN-50717–2 compressor to push down the
vale spring retainer (1) and compress the valve spring (3) until the valve
keys (2) are free from tension. Carefully remove the valve keys then.
- Release the tension from the EN-50717–2 compressor.
- Remove the valve spring retainer (1) and the valve spring (3).
- Remove and DISCARD the valve stem oil seal, using the EN-840
pliers (1).
- Valve Stem Oil Seal Installation
-
Note:
Lubricate the NEW valve stem oil seal with clean engine
oil.
- Install the NEW valve stem oil seal, using the EN-958 installer
(1).
- Loosely install the valve spring and the valve spring retainer.
Caution:
The valve stem keys must correctly seat in the valve
spring cap. Engine damage may occur by not installing properly.
- Using the EN-51717–2 compressor (4), push down the valve spring
retainer (1) and compress the valve spring (3) until the valve keys (2)
can be inserted. Carefully insert the valve keys then, so that they are
proper installed to the valve stem grooves.
- Carefully release the tension from the EN-50717–2 compressor.
- Inspect the valve keys and valve spring retainer for proper seat.
- Repeat the procedure with the remaining valves and cylinders. Transfer
the EN-50717–1 stands and the EN-51717–2 compressor as needed.
- Take care that air pressure is always applied to the combustion chamber
of the treated cylinder.
- Installation Procedure
-
- Set the crankshaft in direction of engine rotation to 60 degrees
(a) before TDC. Use the EN-45059 meter and the crankshaft balancer
bolt.
- Install the valve lifter. Refer to Valve Lifter Replacement.
- Install both camshafts. Refer to Camshaft Replacement.
- Install the camshaft position actuator. Refer to Camshaft Sprocket Replacement.
- Install the spark plugs. Refer to Spark Plug Replacement.
The original equipment tires have tread wear indicators that show when you should
replace the tires.
The location of these indicators are at 60 degree intervals around the outer
diamet ...
Replace any wheel that is bent, cracked, or badly rusted or corroded. If wheel
nuts keep coming loose, the wheel, wheel bolts, and wheel nuts should be replaced.
If the wheel leaks air, replace it ...
Other materials:
Rear Safety Belt Comfort Guides
Rear safety belt comfort guides may provide added safety belt comfort for older
children who have outgrown booster seats and for some adults. When installed on
a shoulder belt, the comfort guide positions the shoulder belt away from the neck
and head.
Safety belt comfort guides are available ...
Engine Coolant Temperature Sensor Replacement (Radiator)
Engine Coolant Temperature Sensor Replacement - Radiator
Callout
Component Name
Preliminary Procedures
Drain the cooling system. Refer to Cooling System Draining and Filling.
1
Retaining C ...
Exhaust System Replacement
Removal Procedure
Special Tools
CH-6614 Chain Pipe Cutter
For equivalent regional tools, refer to Special Tools.
Warning: Refer to Protective Goggles and Glove Warning
Warning: Refer to Exhaust Service Warning.
Raise and support the vehicle. Refer to Lifting ...
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