Acura RL. Manual - part 468

Fig. 39: Zeroing Dial Indicator To The Piston Pin Diameter 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

3. Check the difference between the piston pin diameter and piston pin hole diameter on the piston. 

Piston Pin-to-Piston Clearance  

Standard (New): -0.0050 to +0.0010 mm (-0.00020 to +0.00004 in.)  

Service Limit: 0.004 mm (0.0002 in.)  

Fig. 40: Checking Difference Between Piston Pin Diameter And Piston Pin Hole Diameter On 
Piston 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

4. Measure the piston pin-to-connecting rod clearance. 

Piston Pin-to-Connecting Rod Clearance  

Standard (New): 0.005-0.014 mm (0.0002-0.0006 in.)  

Service Limit: 0.019 mm (0.0007 in.)

 

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2005-08 ENGINE Engine Block - RL

  

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Fig. 41: Measuring Piston Pin-To-Connecting Rod Clearance 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

REASSEMBLY 

1. Install a piston pin snap ring (A). 

Fig. 42: Identifying Piston Pin Snap Ring 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

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 158°F (70°C). 

 

2007 Acura RL 

2005-08 ENGINE Engine Block - RL

  

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© 2005 Mitchell Repair Information Company, LLC. 

Fig. 43: Heating Piston 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

4. Assemble the piston (A) and connecting rod (B) with the embossed marks (C) on the same side. 

Install the piston pin (D). 

 

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2005-08 ENGINE Engine Block - RL

  

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© 2005 Mitchell Repair Information Company, LLC. 

Fig. 44: Identifying Piston, Piston Pin And Connecting Rod
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

5. Install the remaining snap ring.  

PISTON RING REPLACEMENT 

1. Remove the piston from the engine block (see CRANKSHAFT AND PISTON REMOVAL ).  

2. Using a ring expander (A), remove the old piston rings (B). 

Fig. 45: Removing Piston Rings 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

3. Clean all the ring grooves thoroughly with a squared-off broken ring, or a ring groove cleaner with a 

blade that fits the piston grooves. File down the blade, if necessary. The top ring and second ring 
grooves are 1.2 mm (0.05 in.) wide, and the oil ring groove is 2.8 mm (0.11 in.) wide. Do not use a 
wire brush to clean the ring grooves, or cut the ring grooves deeper with the cleaning tool. 

4. Using a piston, push a new ring (A) into the cylinder bore 15-20 mm (0.6-0.8 in.) from the bottom. 

NOTE:

If the piston is to be separated from the connecting rod, do not install 
new rings yet.

 

2007 Acura RL 

2005-08 ENGINE Engine Block - RL

  

me 

 

Friday, June 05, 2009 3:16:24 PM

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© 2005 Mitchell Repair Information Company, LLC.