Replacement

FA20 ENGINE MECHANICAL: CYLINDER HEAD: REPLACEMENT; 2013 MY FR-S [03/2012 -]

1. REPLACE NO. 2 INTAKE VALVE GUIDE BUSH

(a) Place the cylinder block on wooden blocks with the combustion chamber side facing upward.

(b) Using SST and a hammer, tap out the No. 2 intake valve guide bush.





SST : 09201-10000

09201-01050

SST : 09950-70010

09951-07100

NOTICE:
* Place wooden blocks wrapped in a cloth under the cylinder head and stabilize the cylinder head during servicing.
* Use special care not to damage the cylinder head.

(c) Before installing the No. 2 intake valve guide bush, make sure that neither scratches nor damages exist on the inner surface of cylinder head valve guide bush holes.

(d) Draw a reference line 7.6 mm (0.299 in.) below from the top face on a new No. 2 intake valve guide bush using a marker.









HINT
Reference line is used as a guide when tapping-in the No. 2 intake valve guide bush.

(e) Place the cylinder block on wooden blocks with the combustion chamber side facing downward.

(f) Apply enough engine oil to the No. 2 intake valve guide bush, and set it on the cylinder head.

(g) Using SST and a hammer, tap in the No. 2 intake valve guide bush to the reference line.





SST : 09201-10000

09201-01050

SST : 09950-70010

09951-07100

NOTICE:
* Place wooden blocks wrapped in a cloth under the cylinder head and stabilize the cylinder head during servicing.
* Use special care not to damage the cylinder head.

(h) While measuring the No. 2 intake valve guide bush protrusion amount using a vernier caliper, tap in the No. 2 intake valve guide bush so that its height is within the standard.









Standard protrusion height:

11.4 to 11.8 mm (0.449 to 0.466 in.)

NOTICE:
* Place wooden blocks wrapped in a cloth under the cylinder head and stabilize the cylinder head during servicing.
* Use special care not to damage the cylinder head.

HINT
Use multiple small repetitions of tap-in and measurement in order not to excessively tap in the No. 2 intake valve guide bush.

(i) Place the cylinder block on wooden blocks with the combustion chamber side facing upward.

NOTICE:
* Place wooden blocks wrapped in a cloth under the cylinder head and stabilize the cylinder head during servicing.
* Use special care not to damage the cylinder head.

(j) Using a reamer, ream the No. 2 intake valve guide bush to obtain the standard clearance between the No. 2 intake valve guide bush and valve stem.





Standard inside diameter:

5.500 to 5.512 mm (0.21654 to 0.21701 in.) at 20°C (68°F)

NOTICE:
While gradually widening the reamer diameter, ream the No. 2 intake valve guide bush uniformly so that the oil clearance is within the standard.

HINT
* Apply engine oil to the reamer when reaming.
* If the inner surface of No. 2 intake valve guide bush is damaged, slightly grind the edge of the reamer with 400-grit sandpaper.
* If the inner surface of No. 2 intake valve guide bush becomes lustrous and the reamer does not chip, use a new reamer or correct the reamer.

(k) After reaming, remove chips and clean the No. 2 intake valve guide bush.

(l) Measure the inside diameter of the No. 2 intake valve guide bush and confirm the oil clearance.

(m) Check the contact condition between the valve and valve seat.

2. REPLACE NO. 2 EXHAUST VALVE GUIDE BUSH

(a) Place the cylinder block on wooden blocks with the combustion chamber side facing upward.

(b) Using SST and a hammer, tap out the No. 2 exhaust valve guide bush.





SST : 09201-10000

09201-01050

SST : 09950-70010

09951-07100

NOTICE:
* Place wooden blocks wrapped in a cloth under the cylinder head and stabilize the cylinder head during servicing.
* Use special care not to damage the cylinder head.

(c) Before installing the No. 2 exhaust valve guide bush, make sure that neither scratches nor damages exist on the inner surface of cylinder head valve guide bush holes.

(d) Draw a reference line 7.6 mm (0.299 in.) below from the top face on a new No. 2 exhaust valve guide bush using a marker.









HINT
Reference line is used as a guide when tapping-in the No. 2 exhaust valve guide bush.

(e) Place the cylinder block on wooden blocks with the combustion chamber side facing downward.

(f) Apply enough engine oil to the No. 2 exhaust valve guide bush, and set it on the cylinder head.

(g) Using SST and a hammer, tap in the No. 2 exhaust valve guide bush to the reference line.





SST : 09201-10000

09201-01050

SST : 09950-70010

09951-07100

NOTICE:
* Place wooden blocks wrapped in a cloth under the cylinder head and stabilize the cylinder head during servicing.
* Use special care not to damage the cylinder head.

(h) While measuring the No. 2 exhaust valve guide bush protrusion amount using a vernier caliper, tap in the No. 2 exhaust valve guide bush so that its height is within the standard.









Standard protrusion height:

11.4 to 11.8 mm (0.449 to 0.466 in.)

NOTICE:
* Place wooden blocks wrapped in a cloth under the cylinder head and stabilize the cylinder head during servicing.
* Use special care not to damage the cylinder head.

HINT
Use multiple small repetitions of tap-in and measurement in order not to excessively tap in the No. 2 exhaust valve guide bush.

(i) Place the cylinder block on wooden blocks with the combustion chamber side facing upward.

NOTICE:
* Place wooden blocks wrapped in a cloth under the cylinder head and stabilize the cylinder head during servicing.
* Use special care not to damage the cylinder head.

(j) Using a reamer, ream the No. 2 exhaust valve guide bush to obtain the standard clearance between the No. 2 exhaust valve guide bush and valve stem.





Standard inside diameter:

5.500 to 5.512 mm (0.21654 to 0.21701 in.) at 20°C (68°F)

NOTICE:
While gradually widening the reamer diameter, ream the No. 2 exhaust valve guide bush uniformly so that the oil clearance is within the standard.

HINT
* Apply engine oil to the reamer when reaming.
* If the inner surface of No. 2 exhaust valve guide bush is damaged, slightly grind the edge of the reamer with 400-grit sandpaper.
* If the inner surface of No. 2 exhaust valve guide bush becomes lustrous and the reamer does not chip, use a new reamer or correct the reamer.

(k) After reaming, remove chips and clean the No. 2 exhaust valve guide bush.

(l) Measure the inside diameter of the No. 2 exhaust valve guide bush and confirm the oil clearance.

(m) Check the contact condition between the valve and valve seat.