ECU ACURA CSX 2006 Service Owner's Manual




7-12Engine Block
Oil Pan Removal (cont’d)
B
A
19. A/T model: Remove the shift cable cover.
20. K20Z2 engine: Remove the torque converter cover/clutch cover. 21. K20Z3 engine: Remove the clutch cover (A) and the
transmission mounting bolts (B).
22. Remove the bolts securing the oil pan.
23. Using a flat blade screwdriver, separate the oil pan from the lower block in the places shown.
24. Remove the oil pan.
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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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7-30Engine Block
Oil Pan Installation (cont’d)
B
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)
A
12x1.25mm
64N·m(6.5kgf·m,47lbf·ft)
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) 12 x 1.25 mm
74 N·m
(7.5 kgf·m, 54 lbf·ft)
7. K20Z3 engine: Install the transmission mounting
bolts (A) and the clutch cover (B).
8. A/T model: Install the shift cable cover. 9. Install the lower torque rod bracket.
10. If the engine is still in the vehicle, do the following steps.
11. Attach the front subframe adapter (VSB02C000016) to the front subframe, and hang the belt of the front
subframe adapter over the front of the subframe.
Secure the belt with its stop, then tighten the wing
nut (see step 53 on page 5-9).
12. Line up the slots in the front subframe adapter arms with the bolt holes on the jack base, then
securely attach them with four bolts. Lift the front
subframe up to the body.
13. Loosely install the new front subframe mounting bolts (see step 17 on page 5-17).
14. Align all reference marks on the front subframe with the edges of the body, then tighten the bolts
on the front subframe to the specified torque (see
step 18 on page 5-18).
15. Remove the jack and the front subframe adapter.
16. Tighten the new mid-stiffener mounting bolts on both sides (see step 20 on page 5-18).
17. Lower the vehicle on the lift.
18. Loosen the upper torque rod mounting bolt (see step 5 on page 5-15).
Replace.
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7-31
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft)
19. Raise the vehicle on the lift.
20. Install the lower torque rod, then tighten the newlower torque rod mounting bolts in the numbered
sequence shown (see step 21 on page 5-18).
21. M/T model: Loosely tighten the new front mount mounting bolt (see step 22 on page 5-19).
22. Lower the vehicle on the lift.
23. Remove the engine support hanger and engine hanger adapter.
24. Tighten the upper torque rod mounting bolt (see step 25 on page 5-19).
25. Raise the vehicle on the lift.
26. M/T model: Tighten the front mount mounting bolt (see step 27 on page 5-19).
27. A/T model: Install the bolt securing the automatic transmission fluid (ATF) filter. 28. Install the stiffener, then tighten the steering
gearbox mounting bolt and the stiffener mounting
bolt. Install the harness clamp to the front subframe
(see step 29 on page 5-20).
29. Install the steering gearbox bracket. Install the stiffener, then tighten the steering gearbox
mounting bolt and the stiffener mounting bolt (see
step 32 on page 5-20).
30. Connect the lower arms to the knuckles (see step 9 on page 18-16).
31. Connect the stab ilizer links (see page 18-25).
32. Install the splash shield (see step 40 on page 5-20).
33. Install the front wheels.
34. Refill the engine with engine oil (see step 4 on page 8-10).
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K20Z2 engine
10-610-6 Cooling System
Water Pump Inspection
Water Pump Replacement
A
A
B
A
6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
1. Remove the drive belt (see page 4-31).
2. Turn the water pump pulley counterclockwise, and check that it turns freely and smoothly. If it does not
turn smoothly, replace the water pump (see page
10-6).
NOTE: When you check the water pump, you may
see a small amount of ‘‘weeping’’ from the bleed
holes (A). This is normal.
3. Install the drive belt (see page 4-31). 1. Remove the drive belt (see page 4-31).
2. Drain the engine coolant (see page 10-8).
3. Remove the drive belt auto-tensioner pulley
(see page 4-33).
4. Remove the crankshaft pulley (see page 6-16).
5. Remove the six bolts securing the water pump, then remove the water pump (A).
6. Inspect, and clean the O-ring groove and mating surface of the water passage.
7. Install the water pump with a new O-ring (B).
8. Clean up any spilled engine coolant.
9. Install the crankshaft pulley (see page 6-17).
10. Install the drive belt auto-tensioner pulley (see page 4-33).
11. Install the drive belt (see page 4-31).
12. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater
valve open (see step 6 on page 10-8).
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K20Z3 engine
10-710-7
Coolant Check
A B
C
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) C A
B
1. Remove the drive belt (see page 4-31).
2. Drain the engine coolant (see page 10-8).
3. Remove the drive belt auto-tensioner pulley (see page 4-33).
4. Remove the crankshaft pulley (see page 6-16).
5. Remove the oil cooler joint pipe (A), then remove the seven bolts securing the water pump. Remove
the water pump (B).
6. Inspect, and clean the O-ring groove and mating surface of the water passage.
7. Install the water pump with new O-rings (C) and the oil cooler joint pipe.
8. Clean up any spilled engine coolant.
9. Install the crankshaft pulley (see page 6-17).
10. Install the drive belt auto-tensioner pulley (see page 4-33).
11. Install the drive belt (see page 4-31).
12. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater
valve open (see step 6 on page 10-8). 1. Check the coolant level in the coolant reservoir.
Make sure it is between the MAX mark (A) and MIN
mark (B).
2. If the coolant level in the coolant reservoir is at or below the MIN mark, add coolant to bring it up to
the MAX mark, then inspect the cooling system for
leaks.
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K20Z3 engine
10-710-7
Coolant Check
A B
C
6x1.0mm
12 N·m
(1.2 kgf·m, 8.7 lbf·ft) C A
B
1. Remove the drive belt (see page 4-31).
2. Drain the engine coolant (see page 10-8).
3. Remove the drive belt auto-tensioner pulley (see page 4-33).
4. Remove the crankshaft pulley (see page 6-16).
5. Remove the oil cooler joint pipe (A), then remove the seven bolts securing the water pump. Remove
the water pump (B).
6. Inspect, and clean the O-ring groove and mating surface of the water passage.
7. Install the water pump with new O-rings (C) and the oil cooler joint pipe.
8. Clean up any spilled engine coolant.
9. Install the crankshaft pulley (see page 6-17).
10. Install the drive belt auto-tensioner pulley (see page 4-33).
11. Install the drive belt (see page 4-31).
12. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater
valve open (see step 6 on page 10-8). 1. Check the coolant level in the coolant reservoir.
Make sure it is between the MAX mark (A) and MIN
mark (B).
2. If the coolant level in the coolant reservoir is at or below the MIN mark, add coolant to bring it up to
the MAX mark, then inspect the cooling system for
leaks.
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K20Z2 engine
Engine Coolant Capacities (Including the coolant
reservoir capacity of 0.4 L (0.11 US gal))
M/T model:
After Coolant Change: 4.3 L (1.14 US gal)
After Engine Overhaul: 6.6 L (1.74 US gal)
A/T model:
After Coolant Change: 4.2 L (1.11 US gal)
After Engine Overhaul: 6.5 L (1.72 US gal)
K20Z3 engine
Engine Coolant Capacities (Including the coolant
reservoir capacity of 0.4 L (0.11 US gal))
After Coolant Change: 4.5 L (1.19 US gal)
After Engine Overhaul: 6.8 L (1.80 US gal)
10-8
Cooling System
Coolant Replacement
A
A
1. Wait until the engine is cool, then carefully removethe radiator cap.
2. Start the engine. Set the heater temperature control dial to maximum heat, then turn the ignition switch
to LOCK (0). Make sure the engine and the radiator
are cool to the touch.
3. Loosen the drain plug (A), and drain the coolant.
4. After the coolant has drained, tighten the radiator drain plug securely.
5. Remove, drain, and reinstall the coolant reservoir.
6. Fill the coolant reservoir to the MAX mark (A) with Honda Long Life Antifreeze/Coolant Type 2 (P/N
CA66688). 7. Pour Honda Long Life Antifreeze/Coolant Type 2
into the radiator up to the base of the filler neck.
NOTE: Always use Honda Long Life Antifreeze/Coolant Type 2. Using a non-Acura coolant can result in
corrosion, causing the cooling system to
malfunction or fail.
 Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Do
not add water.
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