Acura RL. Manual - part 469

Fig. 46: Pushing Ring Into Cylinder Bore
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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 step 4 ). If
the bore is over the service limit, the engine block must be rebored.

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:

Standard (New): 0.40-0.55 mm (0.016-0.022 in.)

Service Limit: 0.70 mm (0.028 in.)

Oil Ring:

Standard (New): 0.20-0.70 mm (0.008-0.028 in.)

Service Limit: 0.80 mm (0.031 in.)

6. Install the rings 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 face upward.

2007 Acura RL

2005-08 ENGINE Engine Block - RL

Friday, June 05, 2009 3:16:24 PM

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Fig. 47: Identifying Top Ring And Second Ring
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Piston Ring Dimensions:

Fig. 48: Identifying Piston Ring Dimensions
Courtesy of AMERICAN HONDA MOTOR CO., INC.

7. After installing a new set of rings, measure the ring-to-groove clearance:

Top Ring Clearance

Standard (New): 0.065-0.090 mm (0.0026-0.0035 in.)

Service Limit: 0.15 mm (0.006 in.)

Second Ring Clearance

Standard (New): 0.030-0.055 mm (0.0012-0.0022 in.)

Service Limit: 0.13 mm (0.005 in.)

2007 Acura RL

2005-08 ENGINE Engine Block - RL

Friday, June 05, 2009 3:16:24 PM

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Fig. 49: Measuring Ring-To-Groove Clearance:
Courtesy of AMERICAN HONDA MOTOR CO., INC.

8. Rotate the rings in their grooves to make sure they do not bind.

9. Position the ring end gaps as shown:

Fig. 50: Identifying Ring End Gaps
Courtesy of AMERICAN HONDA MOTOR CO., INC.

CRANKSHAFT AND PISTON INSTALLATION

Special Tools Required



Handle driver 07749-0010000



Driver attachment, 106 mm 070AD-RCAA200

1. Check the connecting rod bearing clearance with plastigage (see CONNECTING ROD BEARING

REPLACEMENT ).

2. Check the main bearing clearance with plastigage (see CRANKSHAFT MAIN BEARING

REPLACEMENT ).

3. Install the bearing halves in the engine block and connecting rods.

4. Apply new engine oil to inside of the main bearings and rod bearings.

5. Lower the crankshaft (A) into the engine block.

2007 Acura RL

2005-08 ENGINE Engine Block - RL

Friday, June 05, 2009 3:16:24 PM

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Fig. 51: Identifying Crankshaft
Courtesy of AMERICAN HONDA MOTOR CO., INC.

6. Apply new engine oil to the side with the thrust washer groove. Install the thrust washers (A) in the

No. 3 journal.

Fig. 52: Identifying Thrust Washers
Courtesy of AMERICAN HONDA MOTOR CO., INC.

7. Install the bearings (A) and bearing caps (B) with the arrow (C) facing the timing belt end of the

engine.

2007 Acura RL

2005-08 ENGINE Engine Block - RL

Friday, June 05, 2009 3:16:24 PM

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