Honda HR-V: Valve Seat Reconditioning
Reconditioning
1. Valve, Valve Seal, and Valve Spring Seat - Remove
2. Valve Seat - Reconditioning
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- Inspect valve stem-to-guide clearance. If the valve guides are worn,
replace them before cutting the valve seats.
- Renew the valve seats in the cylinder head using a valve seat cutter.
- Carefully cut a 45º seat, removing only enough material to ensure a
smooth and concentric seat.
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- Bevel the upper and lower edges at the angles shown in the illustration.
Check the width of the valve seat and adjust accordingly
- Make one more very light passes with the 45º cutter to remove any
possible burrs caused by the other cutters.
Intake
Standard (New): 0.85-1.15 mm (0.0335-0.0453 in)
Service Limit: 1.6 mm (0.063 in)
Exhaust
Standard (New): 1.25-1.55 mm (0.0492-0.0610 in)
Service Limit: 2.0 mm (0.079 in)
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- After resurfacing the valve seat, inspect for even valve seating; Apply
Prussian Blue
compound (A) to the valve face. Insert the valve in its original location in
the cylinder
head, then lift it and snap it closed against the valve seat several times
- The actual valve seating surface (B), as shown by the blue compound,
should be
centered on the valve seat:
- If it is too high (closer to the valve stem), you must make a second
cut with the
60º cutter to move it down, then one more cut with the 45º cutter to
restore
valve seat width.
- If it is too low (close to the valve edge), you must make a second
cut with the
30º cutter to move it up, then make one more cut with the 45º cutter
to restore
valve seat width.
NOTE: The final cut should always be made with the 45º cutter.
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- Insert the intake and exhaust valves in the cylinder head, and measure
the valve stem installed height (A).
Standard (New): 50.10-50.60 mm (1.9724-1.9921 in)
Service Limit: 50.90 mm (2.0039 in)
- If the valve stem installed height is over the service limit, replace
the valve and recheck. If it is still
over the service limit, replace the cylinder head; the valve seat in the
cylinder head is too deep.
3. All Removed Parts - Install
- Install the parts in the reverse order of removal.
VALVE STEM-TO-GUIDE CLEARANCE INSPECTION
Inspection
1. Valve and Valve Seal - Remove
2. Valve - Inspect
3. Valve Stem To Guide Clearance - Inspect
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- Subtract the O.D. of the valve stem, measured with a micrometer, from
the I.D. of the valve
guide, measured with an inside micrometer or ball gauge. Take the
measurements in three
places along the valve stem and three places inside the valve guide. The
difference between
the largest valve guide measurement and the smallest valve stem measurement
should not
exceed the service limit.
Standard (New): 0.02-0.05 mm (0.0008-0.0020 in)
Service Limit: 0.08 mm (0.0031 in)
Standard (New): 0.05-0.08 mm (0.0020-0.0031 in)
Service Limit: 0.11 mm (0.0043 in)
4. All Removed Parts - Install
- Install the parts in the reverse order of removal.
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Overview
The electronic throttle control system (ETCS) opens and closes the throttle
valve by electronic control. This
system consists of a throttle actuator built into the throttle body, throttle
v
SEE MORE:
Honing
1. Oil Jet - Remove
2. Cylinder Bore - Honing
Measure the cylinder bores. If the engine block is to be reused, hone
the
cylinders and remeasure the bores. Only scored or scratched cylinder bore
must be
honed.
Hone the cylinder bores with honing oil and a fine (400 grit) stone.
Honi
Special Tools Required
SRS Inflator Simulator 07SAZ-TB4011A
SRS Simulator Lead J 070AZ-SNAA100
NOTE:
Before doing this troubleshooting procedure, find out if the vehicle was
in a collision. If so, verify
that all the required components were replaced with new components of the
correct par