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36. Remove the EVAP canister purge joint with the
bracket.

39. Separate the water passage from the heads.
GASKETS

Replace.

22 N.m
(16 lb-ft)

EVAP CANISTER
PURGE JOINT
WATER PASSAGE

CONNECTING
PIPE

12 N.m (8.7 lb-ft)

37. Remove the fuel rail connecting joint hose.
MOUNTING BOLT

22 N.m (16 lb-ft)

O-RING

Replace.

O-RING

Replace.

40. Remove the appropriate WU-TWC, depending on
diagnosis.
NOTE: Set the WU-TWC aside and cover the
opening with shop towels to prevent coolant from
entering.
FRONT

GASKET

Replace.

QUICK-CONNECT
FITTING

FRONT
WU-TWC

38. Remove the EGR pipe mounting bolts, then
remove the EGR pipe.

NUTS

31 N.m
(23 lb-ft)
Replace.

GASKET

Replace.
GASKET

Replace.
EGR
PIPE

REAR
GASKET

MOUNTING
BOLTS

22 N.m
(16 lb-ft)

Replace.
REAR
WU-TWC
NUTS

31 N.m
(23 lb-ft)
Replace.

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41. Remove the appropriate head with the injector
base attached.
NOTE: Depending on diagnosis, you will remove
the rear bank head or both heads.
FRONT
5

3

7

1

NOTE: Below are the head bolt torque
specifications for reinstallation.
• First step: torque the cylinder bolts in sequence
to 29 N•m (22 lb-ft).
• Second step: tighten in sequence an additional
90 degrees.
• Third step: tighten in sequence an additional
90 degrees.
• If the bolts are new, tighten an additional
90 degrees.

FIRST STEP

8

2

6

4

REAR
5

SECOND STEP

THIRD STEP

3

7

1

(Newbolt)

43. Raise the vehicle.
44. Remove the CKP sensor cover and bolts, then
disconnect the CKP sensor connector.

BOLT
8

2

6

4

12 N.m
(8.7 lb-ft)

42. Measure the head bolts to determine if they need
replacement. If either diameter is less than
11.3 mm (0.445 in), replace the cylinder head bolt.
50 mm (1.97 in)
45 mm (1.77 in)

B

A

CKP SENSOR
CONNECTOR

12 N.m (8.7 lb-ft)

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CKP SENSOR
COVER

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45. Remove the torque converter case cover and the
four bolts securing the oil pan to the transmission.

47. Using a flat blade screwdriver, separate the oil pan
from the engine block in the areas shown.

BOLTS (4)

74 N.m (54 lb-ft)

12 N.m
(8.7 lb-ft)

TORQUE
CONVERTER
CASE COVER

48. Remove the oil strainer and baffle plate.

46. Remove all bolts securing the oil pan.

12 N.m
(8.7 lb-ft)

BOLTS

12 N.m (8.7 lb-ft)
9

5

1

3

7

OIL
STRAINER

12 N.m
(8.7 lb-ft)

11

O-RING

Replace.

BAFFLE
PLATE

13
15

16
17
18
12
14

10

6

2

4

8

49. Remove the appropriate pistons depending on
diagnosis, then go to PISTON CLEANING
PROCEDURE.
NOTE: When removing the piston rod caps, be
sure to keep all caps and bolts with their
corresponding pistons for reassembly purposes.

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PISTON CLEANING PROCEDURE
1. Remove the piston rings from the piston using a
ring expander. Be careful not to damage the piston.

4. Press the handle on the piston ring groove cleaner
tool and slide the cleaning bit onto the appropriate
piston ring grooves.

OLD PISTON
RINGS

RING
EXPANDER

2. Spray the piston head and piston ring grooves
thoroughly with Honda throttle plate cleaner.
3. While holding the piston upright in your left hand,
take the piston ring groove cleaner tool in your right
hand and line up the cleaner tool guides with the
second (middle) piston ring groove.

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5. Once the cleaning bit is in the appropriate ring
grooves of the piston, make sure the tool handle
clicks in to place.
NOTE: There is only one notch on the tool for the
handle to engage.

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6. Hold the piston steady and rotate the tool
counter-clockwise five to six times to remove any
carbon deposits in the piston ring grooves.
Do not rotate the tool clockwise.
NOTE: You can watch this procedure in the
Tech2Tech segment “How to Clean Piston Ring
Grooves”.

NOTE: Below are some examples of before and
after pictures. Depending on mileage and running
conditions, the pistons will achieve different levels
of cleanliness.

7. Remove the piston groove cleaning tool and clean
off the carbon from the tool bit.
8. Finish cleaning the piston with throttle plate cleaner
and the nylon brush. Do not use a steel wire brush.

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9. Install the piston rings as shown.
NOTE: The first (top) ring has a 1D manufacturing
mark and the second (middle) ring has an SPR
manufacturing mark. The manufacturing marks
must be facing upward.

12. Install the piston/connecting rod assembly in to the
cylinder bore with the arrow on top of the piston
facing the timing belt side of the engine.
NOTE: Be careful not to damage the cylinder wall
when installing the piston.
ARROW

TOP RING

MANUFACTURING
MARKS

MANUFACTURING
MARKS

SECOND
RING

13. Measure the diameter of the connecting rod bolts to
determine if they need replacement. Calculate the
difference in diameter between point A and point B.
It should not be more than 0–0.1 mm (0–0.004 in).
35 mm (1.38 in)
B

A

20 mm (0.79 in)

10. Position the ring end gaps as shown.
NOTE: If the ring gaps are not positioned correctly,
excessive blowby may occur.
OIL RING GAP

About 90°

SECOND RING GAP

About 45°

TOP RING GAP and
SPACER RING GAP

OIL RING GAP
PISTON PIN

11. Apply new engine oil to the piston, the inside of the
piston ring compressor, and the cylinder bore.

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14. Apply new oil to the connecting rod bolt threads
and flanges. Torque the bolts to 20 N•m (14 lb-ft),
then tighten the connecting rod bolts an additional
90 degrees.
After torquing, turn bolt
another quarter turn.

CONNECTING
ROD MARK
BOLTS

20 N.m
(14 lb-ft)

CONNECTING
ROD

ROD CAP
CONNECTING
ROD BEARING

15. Reinstall the remaining components in the reverse
order of removal.
16. Replace spark plugs 1–4.
17. Replace the oil filter and refill all fluids.
18. Do the idle learn procedure.

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