1998 ACURA INTEGRA Service Repair Manual

Connecting Rod BearingsCrankshaft
Selection (cont'dlRemoval
818C5 engine:
CAUTION: lf the codes are indecipherable because of
an accumulation of dirt and dust, do not scrub them
with a wire brush or scraper. Clean them only with sol-
vent or detergent.
Connecting Rod Code Location
A number has been stamped on the side of each con-
necting rod as a code for the size of the big end. Use it,
and the letters stamped on the crank lcodes for rod jour-
nal size), to choose the correct bearings.
ilb
Color code ison the edge ofthe bearing.Larger big end bore
Smaller bearing (thicker)
Smallerbeal|ng(thicked
1rI
llli
tl
ilI
I
*z-t o
Smallerrodjournal
Connecting Rod Journal Code Locations {Letters or Barsl
Beering ldentitication
NOTE: End play for the connecting rods and crankshaft
should be inspected before removing the crankshaft.
1. Remove the oil pan, oil screen and the oil pump.
GASKETReplace.
Remove the baffle plate.
Turn the crankshaft so No.2 and 3 crankpins are at
the bottom.
Remove the right side cover.
OIL PAN
Half of number isstamped on bearingcap and the otherhalf is stamped onrod.
212223242526
T
z
Black
Black
Blue

IRemove the bearing cap bolts.
CAUTION: To prevent warpage, unscrew the boltsin sequence 1/3 turn at a time; repeat the sequenceuntil all bolts are loosened.
\J
?, .ia --10) 3r O
Remove the cap bridge (818C1, B18Cb enginesonly) and main caps/bearings. Keep all caps/bear-ings in order.
CAP BRIDGE{818C1, 818C5 engines only}
MAIN CAP
MAIN BEARING
11
T
T
TI
7.Remove the rod caps/bearings. Keep all caps/bearings in order.
Lift the crankshaft out o{ the engine, being care{ulnot to damage journals.
CRANKSHAFT
9. Remove the upper bearing halves from connectingrods and set them aside with their respective caps.
10. Reinstall main caps and bearings on the engine inproper order.
11. lf you can feel a ridge oI metal or hard carbonaround the top of each cylinder, remove it with afldge reamer.
Follow the reamer manufacturer's instructions.
CAUTIONT lf the ridge is not lemoved, it may dam-age the pistons as they are pushed out.
(cont'd)
7-11
RIDGE REAMER

Grankshaft
Removal (cont'dl
Use the wooden handle ot a hammer to drive the
pistons out.
CAUTION:
. Take care not to damage the contact surface ot
the metal gasket.
. When removing the piston/connecting rod, take
care not to hit the oil iet (818C1, 818C5 enginesl.
. ll the oil iet nozzle is damaged or bent, replace
the oil iet assembly {818C1, B18C5 engincs.
page 8-9).
Reinstall the rod bearings and caps after removing
each piston/connecting rod assembly.
l\4ark each piston/connecting rod assembly with its
cylinder number to avoid mixup on reassembly.
NOTE; The existing number on the connecting rod
does not indicate its position in the engine, it indi-
cates the rod bore size.
End Play
NOTE: End play should be inspected before removing
crankshaft.
Push the crank firmly away from the dial indicator, and
zero the dial against the end of the crank. Then pull the
crank firmly back toward the indicator; dial reading
should not exceed service limit.
Crankshaft End Play:
Standard (New): 0.10 - 0.35 mm
{0.00'l - 0.014 inl
Service Limit: 0.45 mm 10.018 inl
. lf end play is excessive, inspect the thrust washers
and thrust surface on the crankshaft. Replace parts as
necessary.
NOTE:
. Thrust washer thickness is tixed and must not be
changed either by grinding or shimming.
. Thrust washers are installed with grooved sides fac-
ing outward.
12.
14.
Frlfll
ftl
t
iffi[l
t,,tlr
lt
i

NOTE:
. Clean the crankshaft oil passages with pipe cleanersor a suitable brush.
. Check the keyway and threads.
Alignment
. Measure runout on all main journals to make sure thecrank as not bent.
. The difference between measurements on each ,our-nal must not be more than the service limit.
Crankshaft Total Indicated Runout:
Standard (New): 0.03 mm (0.001 inl max.Service Limit: 0.05 mm 10.002 in)
DIAL INDICATORRotate two complete
Suppon with lathe-type toolor V-blocks.
Out-of-Round and Taper
. Measure out-of-round at the middle of each rod andmain journal in two places.
. The difference between measurements on each jour
nal must not be more than the service limit.
Journal Out-oI-Round:
Standard {Newl:0,005 mm (0.0002 inl max.
Service Limit: 0,010 mm {0.0004 inl
places at middle.
Measure tapernear edges..r +
. Measure taper at the edges of each rod
JOUrnal.. The difference between measurements on
nal must not be more than the service limit.
Journal Taper:
Standard {New): 0.005 mm (0.0002 in) max.
Service Limit: 0.010 mm 10.0004 inr
and matn
each Jour-
7-13

Cylinder Block
Inspection
1. Measure wear and taper in direction
three levels in each cylinder as shown.
XandYat
{0.24 in}6mm
tFirst
Second
ThirdMeasurement
6 mm 10.24 in)
CYLINDER BORE GAUGE
Cylinder Bore Size:
Standard (N€w): 81.00 - 81.02 mm
(3.189 - 3.190 inl
Service Limit: 81.07 (3.192 inl
Oversize:
0.251 81.25 - 41.27 mm 13.199-3.200 inl
Bore Taoer:
S€rvice Limit: lDifference betwcen first and third
measu;ement) 0.05 mm (0.002 inl
. lf measurements in any cylinder are beyond
Oversize Bore Service Limit, replace the block.
. lf the block is to be rebored, reler to Piston
Clearance Inspection (see page 7-16) after rebor-
I ng.
NOTE: Scored or scratched cylinder bores must be
noneo,
Reboring Limit: 0.25 mm (0.01 inl
ll
:i
I
I
Check the top oI the block for warpage.
Measure along the edges and across the center as
sh own.
SURFACES TO 8E MEASURED
Engine Block Warpage:
B188l engine:
Standard {New}: 0.07 mm (0,003 inl max.
Service Limit: 0.10 mm {0.004 in)
818C1, 818C5 engines:
Standard (Newl:0.05 mm 10.002 inl max.
Service Limit: 0.08 mm (0.003 in)
I
I
rl
LC
'/rz
PRECISION STRAIGHT EDGE

11
Bore Honing
l/easure cylinder bores as shown on page 7-14.lf the block is to be reused, hone the cylinders andremeasure the bores.
Hone cylinder bores with honing oil and a fine (400
grat) stone in a 60 degree cross-hatch pattern.
NOTE:
. Use only a rigid hone with 400 grit or finer stonesuch as Sunnen, Ammco, or equivalent.a Do not use stones that are worn or oroKen.
When honing is complete, thoroughly clean thecylinder block of all melal particles. Wash the cylin-der bores with hot soapy water, then dry and oilimmediately to prevent rusting.
NOTE: Never use solvent, it wili only redistribute
the grit on the cylinder walls.
lf scoring or scratches are still present in cylinderbores after honing to the service limit, rebore theengine block.
NOTE: Some light vertical scoring and scratching isacceptable if it is not deep enough to catch your fin-gernail and does not run the full length ofthe bore.
NOTE:
. After honing, clean the cylinder thoroughly withsoapy water.o Only scored or scratched cylinder bores must behoned.
4.
7-15

Pistons
Inspection
1. Check the piston lor distortion or cracks.
NOTE: lf the cylinder is bored, an oversized piston
musl be used.
2. Measure the piston diameter at a point 15 mm
(0.6 in) from the bottom of the skrrt.
Piston Diameter:
Standard (Newl: 80.98 - 80.99 mm
(3.188 - 3.189 in)
Service Limit: 80.97 mm (3.188 in)
15 mm{0.6 in)
3. Calculate the difference between cylinder bore
diameter on (see page 7-14) and piston diameter.
Piston-to-Cylinder Clearance:
Standard (Newl: 0.010 - 0.040 mm
(0.0004-00016in)
Service Limit: 0.05 mm (0.002 inl
lf the clearance is near or exceeds the service limit,
inspect the piston and cylinder block for excessive
wear.
Ove6ize Piston Diameter:
0-25181-23 - 81.24 mm 13.1980 - 3.1984 in)
@

t
Installation
Bl881, 818C1 enginos:
lf the crankshaft is already installed
'1. Set the crankshaft to BDC for each cylinder.
2, Remove the connecting rod caps, and slip short sec-
tions of rubber hose over the threaded ends of the
connecting rod bolts.
3. Install the ring compressor, and check that the bear-
ing is securely in place.
4. Position the arrow facing the timing belt side of the
eng ine.
The arrow must facethe timing belt sideot the engine. Theconnecting rod oil holemust face the intakemanjfold (81881 engine).
CONNECTING ROOOIL HOLE {81881 enginel
Position the piston in the cylinder. and tap it in
using the wooden handle of a hammer.
NOTE; Maintain downward force on the ring com-pressor to prevent rings from expanding before
entering the cylinder bore.
6. Stop after the ring compfessor pops free, and check
the connecting rod-to-crank journal alignment
betore pushing piston in to place,
7.Check the connecting rod bearing clearance withplastigage {see page 7-9).
Apply engine oil to the bolt threads. then install the
rod caps with bearings,
Installthe nuts, and toroue it.
81881 engine: 31 N.m {3.2 kgf.m, 23 lbf.ft)
BlSCt engine: il4 N.m {i[.5 kgf.m, 33 lbf.ft)
(cont'd)
7-17