check engine ACURA CSX 2006 Service Workshop Manual



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Engine Block Warpage
Standard (New): 0.07 mm (0.003 in.) max.
Service Limit: 0.10 mm (0.004 in.) Piston-to-Cylinder Bore Clearance
Standard (New): 0.020 0.040 mm
(0.0008 0.0016 in.)
Service Limit: 0.05 mm (0.002 in.)
7-17
PRECISION STRAIGHT EDGE SERVICE LIMIT
0.05 mm (0.002 in.)
5. Scored or scratched cylinder bores must be honed.
6. Check the top of the engine block for warpage.
Measure along the edges, and across the center as
shown. 7. Calculate the difference between the cylinder bore
diameter and the piston diameter. If the clearance
is near, or exceeds the service limit, inspect the
piston and the cylinder bore for excessive wear.
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Piston Pin-to-Piston Clearance
Standard (New): 0.005 to 0.002 mm
( 0.00020 to 0.00008 in.)
Service Limit: 0.005 mm (0.0002 in.)
Piston Pin-to-Connecting Rod Clearance
Standard (New): 0.005 0.015 mm (0.0002 0.0006 in.)
Service Limit: 0.02 mm (0.0008 in.)
Reassembly
7-20 Engine Block
Piston, Pin, and Connecting Rod Replacement (cont’d)
A
3. Check the difference between the piston pin
diameter and the piston pin hole diameter in the
piston.
4. Measure the piston pin-to-connecting rod clearance. 1. Install a piston pin snap ring (A) only on one side.
2. Coat the piston pin bore in the piston, the bore in
the connecting rod, and the piston pin with new
engine oil.
3. Heat the piston to about 70 °C (158 °F).
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Piston Ring End-Gap
Top Ring:
Standard (New): 0.20 0.35 mm
(0.008 0.014 in.)
Service Limit: 0.60 mm (0.024 in.)
Second Ring:
K20Z2 engine:
Standard (New): 0.40 0.55 mm (0.016 0.022 in.)
Service Limit: 0.70 mm (0.028 in.)
K20Z3 engine:
Standard (New): 0.50 0.65 mm (0.020 0.026 in.)
Service Limit: 0.75 mm (0.030 in.)
Oil Ring:
Standard (New): 0.20 0.70 mm (0.008 0.028 in.)
Service Limit: 0.80 mm (0.031 in.)
7-22 Engine Block
Piston Ring Replacement (cont’d)
A
B 15 20 mm (0.6 0.8 in.) A
B
K20Z2 engine:
A
B
K20Z3 engine:
BTop Ring (Standard):
A: 3.1 mm (0.12 in.)
B: 1.2 mm (0.05 in.)
Second Ring (Standard):
A: 3.4 mm (0.13 in.)
B: 1.2 mm (0.05 in.)
Piston Ring Dimensions
A A
BC
C
4. Using a piston that has its rings removed, push a
new ring (A) into the cylinder bore 15 20 mm
(0.6 0.8 in.) from the bottom.
5. Measure the piston ring end-gap (B) with a feeler gauge:
 If the gap is too small, check to see if you have the proper rings for your engine.
 If the gap is too large, recheck the cylinder bore diameter against the wear limits (see page 7-16).
If the bore is beyond the service limit, the engine
block must be rebored. 6. Install the top ring and the second ring as shown.
The top ring (A) has a 1R mark, and the second ring
(B) has a 2R mark. The manufacturing marks (C)
must be facing upward.
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Top Ring Clearance
K20Z2 engine:
Standard (New): 0.035 0.060 mm
(0.0014 0.0024 in.)
Service Limit: 0.13 mm (0.005 in.)
K20Z3 engine:
Standard (New): 0.045 0.070 mm (0.0018 0.0028 in.)
Service Limit: 0.13 mm (0.005 in.)
Second Ring Clearance
K20Z2 engine:
Standard (New): 0.030 0.055 mm (0.0012 0.0022 in.)
Service Limit: 0.13 mm (0.005 in.)
K20Z3 engine:
Standard (New): 0.040 0.065 mm (0.0016 0.0026 in.)
Service Limit: 0.13 mm (0.005 in.)
If the Crankshaft is Already Installed
7-237-23
Piston Installation
OIL RING GAP About 90 °
SECOND RING GAP
PISTON PIN OIL RING GAPAbout 45 °
TOP RING GAP and
SPACER RING GAP A
A
B
7. After installing a new set of rings, measure the
ring-to-groove clearances:
8. Rotate the rings in their grooves to make sure they do not bind.
9. Position the ring end gaps as shown: 1. Set the crankshaft to bottom dead center (BDC) for
each cylinder as its piston is installed.
2. Remove the connecting rod caps, then install the ring compressor. Check that the bearing is securely
in place.
3. Apply new engine oil to the piston, inside of the ring compressor, and the cylinder bore, then attach
the ring compressor to the piston/connecting rod
assembly.
4. Position the mark (A) to face the cam chain side of the engine block.
5. Position the piston/connecting rod assembly in the cylinder, and tap it in using the wooden handle of a
hammer (A).
Push down on the ring compressor (B) to prevent
the rings from expanding before entering the
cylinder bore.
6. Stop after the ring compressor pops free, and check the connecting rod-to-rod journal alignment
before pushing the piston into place.
(cont’d)
This illustration shows K20Z2 engine.
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Top Ring Clearance
K20Z2 engine:
Standard (New): 0.035 0.060 mm
(0.0014 0.0024 in.)
Service Limit: 0.13 mm (0.005 in.)
K20Z3 engine:
Standard (New): 0.045 0.070 mm (0.0018 0.0028 in.)
Service Limit: 0.13 mm (0.005 in.)
Second Ring Clearance
K20Z2 engine:
Standard (New): 0.030 0.055 mm (0.0012 0.0022 in.)
Service Limit: 0.13 mm (0.005 in.)
K20Z3 engine:
Standard (New): 0.040 0.065 mm (0.0016 0.0026 in.)
Service Limit: 0.13 mm (0.005 in.)
If the Crankshaft is Already Installed
7-237-23
Piston Installation
OIL RING GAP About 90 °
SECOND RING GAP
PISTON PIN OIL RING GAPAbout 45 °
TOP RING GAP and
SPACER RING GAP A
A
B
7. After installing a new set of rings, measure the
ring-to-groove clearances:
8. Rotate the rings in their grooves to make sure they do not bind.
9. Position the ring end gaps as shown: 1. Set the crankshaft to bottom dead center (BDC) for
each cylinder as its piston is installed.
2. Remove the connecting rod caps, then install the ring compressor. Check that the bearing is securely
in place.
3. Apply new engine oil to the piston, inside of the ring compressor, and the cylinder bore, then attach
the ring compressor to the piston/connecting rod
assembly.
4. Position the mark (A) to face the cam chain side of the engine block.
5. Position the piston/connecting rod assembly in the cylinder, and tap it in using the wooden handle of a
hammer (A).
Push down on the ring compressor (B) to prevent
the rings from expanding before entering the
cylinder bore.
6. Stop after the ring compressor pops free, and check the connecting rod-to-rod journal alignment
before pushing the piston into place.
(cont’d)
This illustration shows K20Z2 engine.
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If the Crankshaft is Not Installed
7-24Engine Block
Piston Installation (cont’d)
90 °
A
A
B
7. Check the connecting rod bearing clearance with
plastigage (see page 7-8).
8. Inspect the connecting rod bolts (see page 7-25).
9. Install the rod caps with bearings. Tighten the bolts to 20 N·m (2.0 kgf·m, 14 lbf·ft) (K20Z2 engine) or
29 N·m (3.0 kgf·m, 22 lbf·ft) (K20Z3 engine).
NOTE: Apply new engine oil to the bolt threads and
flanges.
10. Tighten the connecting rod bolts an additional 90 °.
NOTE: Remove the connecting rod bolt if you
tightened it beyond the specified angle, and go
back to step 8 of the procedure. Do not loosen it
back to the specified angle. 1. Remove the connecting rod caps, then install the
ring compressor, and check that the bearing is
securely in place.
2. Apply new engine oil to the piston, inside of the ring compressor, and the cylinder bore, then attach
the ring compressor to the piston/connecting rod
assembly.
3. Position the mark (A) to face the cam chain side of the engine block.
4. Position the piston/connecting rod assembly in the cylinder, and tap it in using the wooden handle of a
hammer (A).
Push down on the ring compressor (B) to prevent
the rings from expanding before entering the
cylinder bore.
5. Position all pistons at top dead center (TDC).
This illustration shows K20Z2 engine.
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Symptom Diagnostic procedure Also check for
8-5
Symptom Troubleshooting Index
Excessive engine oil
consumption
1.
2.
3.
4.
5.Verify that the engine oil filler cap, the oil drain
bolt, and the oil filter are tight.
Check for oil leaks.
Check for worn valve guide(s) (see page 6-55) or
worn valve stem seal(s) (see page 6-54).
Check for damaged or worn piston ring(s)
(see page 7-21).
Check for damaged or worn engine internal parts
(cylinder wall, pistons, etc.) (see page 7-16).
Low oil pressure indicator does
not come on with the ignition
switch in ON (II) 1.
2.Do the low oil pressure indicator circuit
troubleshooting (Open) (see page 8-7).
Test the oil pressure switch (see page 8-9). An open in the wire
between the engine
control module (ECM)/
powertrain control
module (PCM) and the
oil pressure switch
Low oil pressure indicator stays
on 1.
2.
3.
4.
5.
6.
7.
8.Check the engine oil level.
Do the low oil pressure indicator circuit
troubleshooting (Short) (see page 8-8).
Test the oil pressure switch (see page 8-9).
Check the engine oil pressure (see page 8-10).
Check the oil filter for clogging.
Check the oil screen for clogging.
Check the relief valve (see page 8-15).
Testtheoilpump(seepage8-17). A wire shorted to
ground between the
ECM/PCM and the oil
pressure switch
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YES
NO
YES
NO YES
NO
8-7
Low Oil Pressure Indicator Circuit Troubleshooting (Open)
ECM/PCM CONNECTOR B (44P)
OPSW
(YEL/RED)
OIL PRESSURE
SWITCH CONNECTOR
OPSW
(YEL/RED)
1. Connect the Honda Diagnostic System (HDS) to thedata link connector (DLC) (see step 2 on page 11-3).
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain
control module (PCM). If it does not communicate,
troubleshoot the DLC circuit (see page 11- 204).
4. Check for DTCs (see page 11-3). If a DTC is present, diagnose, and repair the cause before continuing
with this test.
5. Check the OIL PRESSURE SWITCH in the PGM-FI DATA LIST with the HDS.
Replace the gauge control module (tach)
(see page 22-277).
Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Check the oil pressure switch (see page 8-9).
Go to step 8.
Replace the oil pressure switch (see page 8-9).
8. Turn the ignition switch to ON (II), and jump the SCS line with the HDS, then turn the ignition switch
to LOCK (0).
NOTE: This step must be done to protect the ECM/
PCM from damage.
9. Disconnect ECM/PCM connector B (44P) and the oil pressure switch connector. 10. Check for continuity between ECM/PCM connector
terminal B7 and the oil pressure switch connector.
Update the ECM/PCM if it does not have the
latest software (see page 11-227), or substitute a
known-good ECM/PCM (see page 11-7), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original
ECM/PCM (see page 11-228).
Repair an open in the wire between the oil
pressure switch and ECM/PCM connector terminal
B7.
Terminal side of female terminals
Wire side of
female terminal
Is ON indicated?
I s t he oi l pr essur e sw i t ch OK ? Is there continuity?
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NO
YES
NO
YES
NO YES
NO
8-8Engine Lubrication
Low Oil Pressure Indicator Circuit Troubleshooting (Short)
OIL PRESSURE SWITCH CONNECTOR
OPSW
(YEL/RED)
1. Connect the Honda Diagnostic System (HDS) to thedata link connector (DLC) (see step 2 on page 11-3).
2. Turn the ignition switch to ON (II).
3. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain
control module (PCM). If it does not communicate,
troubleshoot the DLC circuit (see page 11- 204).
4. Check for DTCs (see page 11-3). If a DTC is present, diagnose, and repair the cause before continuing
with this test.
5. Start the engine, and check the OIL PRESSURE SWITCH in the PGM-FI DATA LIST with the HDS.
Replace the gauge control module (tach)
(see page 22-277).
Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Disconnect the oil pressure switch connector.
8. Start the engine, and check the OIL PRESSURE SWITCH in the PGM-FI DATA LIST with the HDS.
Turn the ignition switch to LOCK (0), then go
to step 9.
Turn the ignition switch to LOCK (0), then go
to step 10.
9. Check the oil pressure switch (see page 8-9).
Do the oil pressure test (see page 8-10).
Replace the oil pressure switch (see page 8-9). 10. Turn the ignition switch to ON (II), and jump the
SCS line with the HDS, then turn the ignition switch
to LOCK (0).
NOTE: This step must be done to protect the ECM/
PCMfromdamage.
11. Disconnect ECM/PCM connector B (44P).
12. Check for continuity between the oil pressure switch connector and body ground.
Repair a short to ground in the wire between
the oil pressure switch and ECM/PCM connector
terminal B7.
Update the ECM/PCM if it does not have the
latest software (see page 11-227), or substitute a
known-good ECM/PCM (see page 11-7), then
recheck. If the symptom/indication goes away with
a known-good ECM/PCM, replace the original
ECM/PCM (see page 11-228).
Wire side of female terminal
I s OF F i nd i cat ed ?
I s OF F i nd i cat ed ?I s t he oi l pr essur e sw i t ch OK ? Is there continuity?
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8-98-9
Oil Pressure Switch Test Oil Pressure Switch Replacement
A
B C
B
18 N·m
(1.8 kgf·m, 13 lbf·ft)A
1. Disconnect the oil pressure switch connector (A)
from the oil pressure switch (B).
2. Check for continuity between the positive terminal (C) and the engine (ground). There should be
continuity with the engine stopped. There should
be no continuity with the engine running. 1. Disconnect the oil pressure switch connector (A),
then remove the oil pressure switch (B).
2. Remove any old liquid gasket from the switch and the switch mounting hole.
3. Apply a very small amount of liquid gasket to the oil pressure switch threads, then install the oil
pressure switch.
NOTE: Using too much liquid gasket may cause
liquid gasket to enter the oil passage or the end of
the new oil pressure switch.
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