996 911 engine timing
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Track Day
Joined: Oct 2012
Posts: 18
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996 911 engine timing
hey everyone
i have this '01 911 996 that i'm trying to put together. i would need a little help with the timing. never done this (porsche) before. pictures, or a video, or anything would help.
thanks a bunch
i have this '01 911 996 that i'm trying to put together. i would need a little help with the timing. never done this (porsche) before. pictures, or a video, or anything would help.
thanks a bunch
Captain Obvious
Super User
Super User
Joined: Aug 2003
Posts: 22,846
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From: Cambridge, Ontario, Canada
The most important thing is that you have to time one bank and then rotate the crank a full revolution to the other bank. The procedure is the same for both banks but they are not done at the same time.
Drifting
Joined: Oct 2011
Posts: 3,217
Likes: 14
From: Texas
Heres the timng steps from the service manual if that helps.
Adjusting Timing - Cylinder Bank 1-3
Requirements
Three auxiliary chain tensioners fitted with correct pretension.
1.Turn engine to installation position on assembly support.
2.Remove fixing pin. Advance crankshaft 360°clockwise until the bore 1 OT (top dead center) in the belt pulley is aligned with the fixing bore on the crankcase. Position or fix with fixing pin (short) of special tool 9595.
View from the flywheel side
3.Check basic camshaft adjustment of cylinder bank 1 - 3 Ensure that the groove in the camshaft faces outward toward the cylinder head cover.
4.Turn engine 90°clockwise on the assembly support. Cylinder bank 1 - 3 faces upward.
View from the belt pulley side
5.If the allocation is correct, the narrow segment must face the cylinder head cover on the opposite side of the cylinder head.
6.Fasten blocking device (special tool 9612) on the cylinder head.
7.Special tool fitting sequence: A - Fastening screw with star **** on cylinder head lug. Pull back centering piece (B) and sword bolt (C) when tightening.
B - Centering piece in groove of the exhaust camshaft. Pull sword bolt (C) back when tightening.
C - Sword bolt
D - Center section (pivoting).
8.Undo four hexagon-head screws (M6 x 15) on the sprocket wheel on the opposite side.
9.Allocate camshafts; to do this, turn the pretension center piece (D) accordingly until the sword bolt (C) can be fixed in the bearing bore of the inlet camshaft.
10.Fasten sprocket wheel. Tightening torque 14 Nm (10.5 ft. lbs.)
11.Remove blocking device.
Adjusting timing - Cylinder bank 4 - 6
1.Turn engine to installation position on assembly support.
2.Remove fixing pin. Advance crankshaft 360°clockwise until the bore 1 OT (top dead center) in the belt pulley is aligned with the fixing bore on the crankcase. Position or fix with fixing pin (short) of special tool 9595.
View from the belt pulley side
3.Check camshaft adjustment at cylinder bank 4 - 6: The groove in the camshaft must face inward toward the crankcase.
4.Turn engine 90°counterclockwise on the assembly support. Cylinder bank 4 - 6 faces upward.
5.If the allocation is correct, the narrow segment must face the cylinder head cover on the opposite side of the cylinder head.
6.Fasten blocking device (special tool 9612) on the cylinder head (4 - 6).
7.Perform assembly steps for timing adjustment as described from Step 7 to Step 11.
8.Fit oil extraction pumps
Note: The oil extraction pumps on the cylinder heads are identical parts. Therefore, the installation position and direction of rotation must be correct.
Installation position of oil extraction pump at cylinder head 1 - 3 (flywheel side). The arrow for the direction of rotation or the marking 1 - 3" must face the crankcase. Fit oil extraction pump. Use new sealing ring and new micro-encapsulated hexagon socket head screws. Tightening torque: 10 Nm (7.5 ft. lbs.)
Installation position of oil extraction pump at cylinder head 4 - 6 (belt pulley side). The arrow for the direction of rotation or the marking "4 - 6" must face the crankcase.
Fit oil extraction pump. Use new sealing ring and new micro-encapsulated hexagon socket head screws. Tightening torque: 10 Nm (7.5 ft. lbs.)
9.Unscrew auxiliary chain tensioner, put new sealing ring on the original chain tensioner and install. Tightening torque: 80 Nm (59 ft. lbs.) (Wrench size 30 mm.)
Note: The compression springs of the auxiliary chain tensioners should be relieved after measurement. Unscrew thrust screw (wrench size 19 mm).
Allocation of chain tensioners
Installation position of the chain tensioners (engine in installed position)
Chain tensioner on the crankcase
Chain tensioner on cylinder bank 1 - 3
Chain tensioner on cylinder bank 4 - 6
10.Fit caps (6 ea.) for camshaft bores,
Installation
1.Clean receiving bore; remove any silicone material emerging. Manually fit new cap dry and press in as far as it will go.
Adjusting Timing - Cylinder Bank 1-3
Requirements
Three auxiliary chain tensioners fitted with correct pretension.
1.Turn engine to installation position on assembly support.
2.Remove fixing pin. Advance crankshaft 360°clockwise until the bore 1 OT (top dead center) in the belt pulley is aligned with the fixing bore on the crankcase. Position or fix with fixing pin (short) of special tool 9595.
View from the flywheel side
3.Check basic camshaft adjustment of cylinder bank 1 - 3 Ensure that the groove in the camshaft faces outward toward the cylinder head cover.
4.Turn engine 90°clockwise on the assembly support. Cylinder bank 1 - 3 faces upward.
View from the belt pulley side
5.If the allocation is correct, the narrow segment must face the cylinder head cover on the opposite side of the cylinder head.
6.Fasten blocking device (special tool 9612) on the cylinder head.
7.Special tool fitting sequence: A - Fastening screw with star **** on cylinder head lug. Pull back centering piece (B) and sword bolt (C) when tightening.
B - Centering piece in groove of the exhaust camshaft. Pull sword bolt (C) back when tightening.
C - Sword bolt
D - Center section (pivoting).
8.Undo four hexagon-head screws (M6 x 15) on the sprocket wheel on the opposite side.
9.Allocate camshafts; to do this, turn the pretension center piece (D) accordingly until the sword bolt (C) can be fixed in the bearing bore of the inlet camshaft.
10.Fasten sprocket wheel. Tightening torque 14 Nm (10.5 ft. lbs.)
11.Remove blocking device.
Adjusting timing - Cylinder bank 4 - 6
1.Turn engine to installation position on assembly support.
2.Remove fixing pin. Advance crankshaft 360°clockwise until the bore 1 OT (top dead center) in the belt pulley is aligned with the fixing bore on the crankcase. Position or fix with fixing pin (short) of special tool 9595.
View from the belt pulley side
3.Check camshaft adjustment at cylinder bank 4 - 6: The groove in the camshaft must face inward toward the crankcase.
4.Turn engine 90°counterclockwise on the assembly support. Cylinder bank 4 - 6 faces upward.
5.If the allocation is correct, the narrow segment must face the cylinder head cover on the opposite side of the cylinder head.
6.Fasten blocking device (special tool 9612) on the cylinder head (4 - 6).
7.Perform assembly steps for timing adjustment as described from Step 7 to Step 11.
8.Fit oil extraction pumps
Note: The oil extraction pumps on the cylinder heads are identical parts. Therefore, the installation position and direction of rotation must be correct.
Installation position of oil extraction pump at cylinder head 1 - 3 (flywheel side). The arrow for the direction of rotation or the marking 1 - 3" must face the crankcase. Fit oil extraction pump. Use new sealing ring and new micro-encapsulated hexagon socket head screws. Tightening torque: 10 Nm (7.5 ft. lbs.)
Installation position of oil extraction pump at cylinder head 4 - 6 (belt pulley side). The arrow for the direction of rotation or the marking "4 - 6" must face the crankcase.
Fit oil extraction pump. Use new sealing ring and new micro-encapsulated hexagon socket head screws. Tightening torque: 10 Nm (7.5 ft. lbs.)
9.Unscrew auxiliary chain tensioner, put new sealing ring on the original chain tensioner and install. Tightening torque: 80 Nm (59 ft. lbs.) (Wrench size 30 mm.)
Note: The compression springs of the auxiliary chain tensioners should be relieved after measurement. Unscrew thrust screw (wrench size 19 mm).
Allocation of chain tensioners
Installation position of the chain tensioners (engine in installed position)
Chain tensioner on the crankcase
Chain tensioner on cylinder bank 1 - 3
Chain tensioner on cylinder bank 4 - 6
10.Fit caps (6 ea.) for camshaft bores,
Installation
1.Clean receiving bore; remove any silicone material emerging. Manually fit new cap dry and press in as far as it will go.