- Install gear spring, sub-gear and wave washer. Refer to Figure
. Align pin on gear with gear spring ends. Install snap ring. Install pins "A" and "B" in sub-gear. See Figure
. Using screwdriver, rotate sub-gear clockwise. Install service bolt and remove pins.
CAUTION:
Keep camshaft level during installation, or camshaft binding and breakage may occur.
- To install exhaust camshaft, lubricate thrust area of camshaft with multipurpose grease. Install exhaust camshaft so knock pin is in 4 o'clock position. This angle allows No. 1 and No. 3 cylinder cam lobes to push on valve lifters evenly. Apply RTV sealer (1052917) to No 1 bearing cap. See Fig 1
. Install exhaust camshaft bearing caps on cylinder head.
CAUTION:
Ensure arrow on camshaft bearing cap points toward timing belt end of engine. Install caps so numbers are in order.
- Tighten bolts on exhaust camshaft bearing caps evenly in sequence. See Fig 2
. Tighten bolts to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article.
- Apply multipurpose grease on camshaft oil seal. Using Seal Installer (J-35403), install seal on exhaust camshaft.
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
CAUTION:
DO NOT confuse TDC marks with camshaft aligning marks. During camshaft installation, ensure installing marks, not TDC marks, are aligned.
- To install intake camshaft, rotate exhaust camshaft so knock pin is at approximately 10 o'clock position. See Fig 3
. Lubricate thrust area of camshaft with multipurpose grease. Install intake camshaft so installing marks on camshaft gears are aligned.
- Install all camshaft bearing caps, except No. 1, on cylinder head. Tighten both bolts on each camshaft bearing cap in sequence. See Fig 2
. Tighten bolts to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article.
CAUTION:
Ensure arrow on camshaft bearing cap points toward timing belt end of engine. Install bearing caps so numbers are in order.
- Remove bolt from service bolt hole. Install No. 1 bearing cap. If No. 1 camshaft bearing cap does not fit properly, push camshaft gear backward while installing camshaft bearing cap. Tighten bolts to specification. See TORQUE SPECIFICATIONS TABLE at the end of this article. Rotate exhaust camshaft clockwise so knock pin is at 12 o'clock position.
- Ensure TDC marks are together and at cylinder head surface. See Fig 3
. The installing marks should be at 12 o'clock position.
CAUTION:
Check valve clearance if cylinder head or camshaft components were serviced or changed. See VALVE CLEARANCE ADJUSTMENT under ADJUSTMENTS.
- To install remaining components, reverse removal procedure. Before installing valve cover, apply Sealant (1052751) at valve cover-to-camshaft bearing cap surfaces.