1997 HONDA CR-V piston

Pistons and
Crankshaft
Selection
Connecting Rod Code Location
Numbers have been stamped on the side of each con-
necting rod as a code for the size of the big end. Use
lhem, and the letters stamped on the crankshaft (codes
for rod journal size), to choose the correct bearings.
lf the codes are indeciDherable because of an accumula-
tion of dirt and dust, do not scrub them with a wire
brush or scraper. Clean them only with solvent or deter-
gent.
8€aring ldentif ication
aolor code is on theedge oltne Deanng.
Larger big end bore
---------------r. sma er bearino {thicker)
RedPinkGreen
PinkGreenBrown
GreenBrownBlack
GreenBrownElackBlue
Half of number isstamped on beanngcap and the othelhalf is stamped onrod.
Connecting Rod Journal Code Locations {Lettersl
llAort ll
llBo'll ll
llcotrll ll
I l-.. ilril It-lSmaller'odSmallerbeanng(thicker)
234
Removal
Remove the oil pan assembly.
Remove the right side cover.
1.
Remove the oil screen.
Remove the oil pump.
OIL SCREEN
(cont'd)
7-9
OIL PUMP
5. Remove the baffle plate.
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Pistons and Crankshaft
Removal (cont'dl
6. Remove the bolts. To prevent warpage, unscrew the
bolts in sequence 1/3 turn at a time; repeat the
sequence until all bolts are loosened.
Remove the rod caps/bearings and main caps/bear-
ings, Keep all caps/bearings in order
Lift the crankshaft out of the engine. being careful
not to damage the journals.
7.
7-10
9.
10.
Remove the upper bearing halves from the connecting
rods, and set them aside with their respective caps.
Reinstall the main caps and bearings on the engine
in proper order.
lf you can feel a ridge of metal or hard carbon
around the top of each cvlinder, remove it with a
ridge reamer. Follow the reamer manufacturer's
instructions. lf the ridge is not removed, it may
damage the pistons as they 8re pushed out.
12.
11.
14.
Use the wooden handle of a hammer to drive the
pistons out.
13.Reinstall the connecting rod bearings and caps after
removing each piston/connecting rod assembly.
To avoid mixup on reassembly, mark each piston/
connecting rod assembly with its cylinder number.
NOTE: The existing number on the connecting rod
does not indicate its position in the engine, it indi-
cates the rod bore size.
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PistonsI
Inspection
LCheck each piston for distortion or cracks.
Measure the piston diameter at distance A from the
bottom of the skirt.
A: '97 - 98 models 15 mm 10.5 inl'99 - 00 models 20 mm 10.8 inl
Piston Diameter:
Standard (New): 8:1.980 - txl.990 mm(3.3063 - 3.3067 inl
Service Limit: 83.970 mm {3.3059 inl
SKIRT DIAMETER
7-12
3. Calculate the difference between the cylinder bore
diameter (see page 7-13) and the piston diameter.
Piston-to-Cylinder Clearance:
Standard {New): 0.010 - 0.040 mm
{0.0004 - 0.0016 inl
Service Limit: 0.05 mm {0.002 in}
lf the clearance is near or exceeds the service limit,
inspect the piston and cylinder block for excessive
wear.
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Piston PinsConnecting Rods
Assemble the Piston Pin Tools as shown.
PISTON BASE HEAO07HAF -PL20102
PISTON BASE07973 - 6570500
Adjust the length A of the piston pin dflver.
A: 49.70 mm 11.957 in)
PIN DRIVER HEAIPE00320
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ffi-"""-
u_ll
3. Place the piston on the piston base, and press the
pin out with a hydraulic press. Make sure that the
recessed portion of the piston aligns with the lips
on the collar.
7-14
Removal
1.
PISTON07973 -
PISTON PIN BASE INSERT07GAF - PH60300
PISTON PIN DRIVER SHAFT07973 - PEt 0310
PILOT COLLAR07LAF - PR30100Embossod mark facing up.
Selection
Each rod falls into one of four tolerance ranges (from 0
to + 0.024 mm {0 to + 0.0009 in). in 0.006 mm (0.0002 in)
increments) depending on the size of its big end bore.
lt's then stamped with a number 1.1.2,3, or 4) indicating
the range.
You may find any combination ot 1,2,3, or 4 in any
engrne.
Normal Bore Size: ,18.0 mm (1.89 in)
Inspect the connecting rod for cracks and heat damage.
CONNECTING ROD BOREREFENENCE NUMBERHalf of number is stamped onbearing cap, the other half onconnectno roo.
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Piston Pins
lnstallation
The arrow must face thetiming belt side ot theengine and the connectingrod oil hole must face therear of the engine.
CONNECTING ROOotL Hor.E
1. Adjust the length B of the piston pin driver and shaft.
B: 49.70 mm (1.957 in)
PISTON PIN DRIVER SHAFT0t973 - P€qxtlo
Place the piston on the
pin in with a hydraulic
recessed portion of the
on the piston base head.
ffi*r,"ron'nl
PILOT COLLAROTLAF - PF3O1(x'
PISTON PIN BASE INSERT07GAF - PH6o3ttO
PISTON BASE HEADOTHAF - PL2O102
PISTON BASE07973 - 6670500
piston base and press the
press. Make sure that the
piston aligns with the lugs
7-15
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Piston Pins
lMeasure the diameter of the piston pin.
Piston Pin Diameter:
Standard lNewl: 20.996 - 21.000 mm
{0.8266 - 0.8268 in}
20.998 - 21.002 mm(0.8267 - 0.8268 in)
Inspection
1.
Oversize:
2. Zeto the dial indicator to the piston pin diameter.
7-16
3. Measure the piston pin to piston clearance. lf the
piston pin clearance is greater than 0.024 mm
(0.0009 inL remeasure using an oversized piston pin.
NOIE: All replacement piston pins are oversize.
Piston Pin-to-Piston Clearance:
Standard lNewl: 0.010 - 0.017 mm
10.0004 - 0.0007 in)
Check the difference betlveen the piston pin diame-
ter and the connecting rod small end diameter.
Piston Pin-to-Connecting Rod Interference:
Standard (New): 0.015 - 0.032 mm(0.0006 - 0.0013 inl
4.
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Piston Rings
End Gap
2.
1.Using a piston, push a new ring into the cylinder
bore 15 - 20 mm (0.6 0.8 in) from the bottom
Measure the piston ring end-gap with a feeler
ga uge:
. lf the gap is too small, check to see if you have
the proper rings for your engine.
. lf the gap is too large, recheck the cylinder bore
diameter against the wear limits on page 7 '13.
Piston Ring End-Gap:
Top Ring
Standard (Newl:0.20 - 0.30 mm
10.008 - 0.012 inl
Service Limit: 0.60 mm {0.024 inl
Second Ring
Standard lNew): 0.i10 - 0.55 mm
{0.016 - 0.022 inl
Service Limit: 0.70 mm (0.028 in)
Oil Ring
Standard (Newl: 0.20 - 0.50 mm
10.008 - 0.020 in)
Service Limit: 0.70 mm (0.028 in)
PISTON RING
--:4 llEND GAP -1f-
Ring-to-Groove Glearance
After installing a new set of rings, measure the ring-to-
groove clearances:
Top Ring Clearance:
Standard {New}: 0.055 - 0.080 mm
10.0022 - 0.0031 inl
Service Limit: 0.13 mm 10,005 inl
Second Ring Clearance:
Standard {Newl: 0.035 - 0.060 mm
{0.001'l - 0.0024 inl
Service Limit: 0,13 mm 10.005 inl
7-17
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Piston Rings
2.
Replacement
1.Using a ring expander, remove the old piston rings.
Clean all the ring grooves thoroughly with a
squared-off broken ring or a ring gtoove cleaner
with a blade to fit the piston grooves.
The top ring groove is 1.2 mm (0.042 in) wide, rhe
second ring groove is 1.2 mm (0.042 in) wide, and
the oil ring groove is 2.8 mm (0.11 in) wide. File
down a blade if necessary.
Do not use a wire brush to clean ring lands, or cutring lands deeper with cleaning tool.
3. Install the new rings in the proper sequence andposition (shown in the right column).
NOTE: lfthe piston is to be separated from the con-
necting rod, do not install new rings yet.
7-18
RING EXPANDER
Alignment
l. Installthe rings as shown.
Piston Ring Dimensions:
|- T fB
+k-'1
A
Top Ring {standard}:
A: 3.1 mm (0.12 in)
B: 1.2 mm 10.05 inl
Second Ring (standard):
A: 3.'1 mm (0. f 3 in)
B: 1.2 mm (0.05 in)
NOTE: The manufacturing marks must
upward.
be tacing
MARK
z:-\ropnrNG+S
SECOND RING +
,A-\
o**^o( €ffi+-sPAcER
\zu-\
v
TOP RING
'97 - 98 models:
'99 - O0 mod€ls:
l-;
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