Removal

FA20 ENGINE MECHANICAL: TIMING CHAIN: REMOVAL; 2013 MY FR-S [03/2012 -]

1. REMOVE TIMING CHAIN OR BELT COVER SUB-ASSEMBLY

Removal

2. REMOVE CHAIN SUB-ASSEMBLY (for Bank 1)

(a) Temporarily install the pulley bolt to the crankshaft.

(b) Turn the crankshaft and align the alignment marks of the crankshaft timing gear or sprocket, camshaft timing intake gear assembly RH and camshaft timing exhaust gear assembly RH.

HINT
The crankshaft key faces downward at this time.

(c) Push down the chain tensioner slipper and insert a 2.5 mm (0.098 in.) hexagonal wrench through the stopper plate into the No. 1 chain tensioner assembly.

(d) Remove the 2 bolts and No. 1 chain tensioner assembly.

(e) Remove the chain tensioner slipper.

(f) Using a 5 mm hexagonal wrench, remove the bolt and No. 1 chain vibration damper.

(g) Remove the chain sub-assembly.

NOTICE:
* With the chain sub-assembly removed, the valve heads may contact each other if the camshafts are turned, causing the valve stems to bend.
* To avoid this, do not turn the intake camshaft RH and the exhaust camshaft RH more than the zero-lift range (the range where camshafts can be turned lightly by hand).

HINT
Arrange the removed parts in the correct order.

3. REMOVE CHAIN SUB-ASSEMBLY (for Bank 2)

(a) Turn the crankshaft and position each alignment mark on the crankshaft timing gear or sprocket, camshaft timing intake gear assembly LH and camshaft timing exhaust gear assembly LH as shown in the illustration.

(b) Push the chain tensioner slipper and retain the plunger by inserting an approximately 1 mm (0.039 in.) wire through the stopper plate into the No. 2 chain tensioner assembly.

(d) Remove the chain tensioner slipper.

(e) Remove the O-ring from the cylinder block (bank 2).

(f) Using a 5 mm socket hexagon wrench, remove the bolt and No. 1 chain vibration damper.

(g) Remove the chain sub-assembly.

NOTICE:
* With the chain sub-assembly removed, the valve heads may contact each other if the camshafts are turned, causing the valve stems to bend. To avoid this, do not turn the exhaust camshaft LH more than the zero-lift range (the range where the camshaft can be turned lightly by hand).
* At this time, the No. 1 and No. 4 pistons are located near TDC. If the intake camshaft is turned, the valves may come into contact with the piston, causing the valve stems to bend. To avoid this, do not turn the intake camshaft LH.

HINT
Arrange the removed parts in the correct order.

(h) Remove the pulley bolt.