Setting Camshaft Timing Cadillac DeVille Concours I final

Note. Setting camshaft timing is necessary whenever camshaft drive system has been disturbed such that the relationship between any chain and sprocket has been lost. Even when only one sprocket is involved, the timing procedure should be observed since one crankshaft revolution will not confirm correct timing. The camshafts and crankshaft are correctly timed when the relationships shown in illustration exist (timing marks on crankshaft sprocket and intermediate shaft sprocket are aligned and all 4 camshaft drive pins are at a right angle to cylinder head surface). (Scheme 6)

1. Remove camshaft covers. See «CAMSHAFT COVER»(ref-1392-S00785795702000031300000). Remove front cover. See «FRONT COVER»(ref-1392-S25744538572000031300000). Remove or fully retract all 3 chain tensioners. Remove oil pump. See «OIL PUMP»(ref-1392-S13181614652000031300000) under ENGINE OILING.
2. Primary and secondary chain guides should remain in place. Rotate crankshaft until sprocket drive key is positioned at about 1 o'clock.
3. Set crankshaft and intermediate shaft sprockets into primary drive chain with their timing marks adjacent to each other. (Scheme 6)
4. Install crankshaft and intermediate sprockets over their respective shafts. Rotate crankshaft as necessary to engage crankshaft key in sprocket without changing the timing mark relationship.
5. Install Flywheel Holder (J-39411) to lock crankshaft in position. If engine is on stand, an alternate locking method should be devised. Install intermediate sprocket retaining bolt and tighten to specification. See «TORQUE SPECIFICATIONS»(ref-1392-S09285118392000031300000) table.
6. Route secondary chain for left cylinder head over inner row of intermediate shaft teeth. Route secondary drive chain over chain guide, and install exhaust camshaft sprocket to chain so camshaft drive pin engages sprocket notch marked LE (left head exhaust). There should be no slack in lower section of chain, and camshaft drive pin must be perpendicular to cylinder head face. (Scheme 6)
7. Install intake camshaft sprocket into chain so the sprocket notch marked LI (left head intake) engages camshaft drive pin, while pin remains perpendicular to head face. Minor camshaft positioning adjustments can be made using open-end wrench on hex cast into camshaft. see scheme 5
8. Install sprocket retainer bolts and chain tensioner and tighten to specification. See «TORQUE SPECIFICATIONS»(ref-1392-S09285118392000031300000) table.
9. Route secondary chain for right cylinder head over outer row of intermediate shaft teeth, and repeat steps 6 through 8. Right camshaft sprockets are identified RI (right intake) and RE (right exhaust). In addition, RE sprocket must contain camshaft position sensor pick-up.

Scheme 6

Removal

1. Release tension from accessory drive belt. Raise vehicle on hoist. Remove right front wheel. Remove 2 splash shields from wheelhouse. Remove brace between engine oil pan and transaxle case, and install Flywheel Holder (J-39411). Remove balancer bolt.
2. Support engine cradle with tall screw jack, and remove 3 engine cradle bolts on right side of cradle. Disconnect Road Sensing Suspension (RSS) sensor from right lower control arm.
3. Lower engine cradle to obtain clearance below body rail for Puller (J-34816). Install pilot into end of crankshaft. Remove harmonic balancer using Puller (J-38416).

Installation

Position balancer on crankshaft and install using Installer (J-39344). Clean and oil balancer bolt threads and tighten to specification. See TORQUE SPECIFICATIONS table. To complete installation, reverse removal procedure.

1. Remove engine and place on stand. See «ENGINE»(ref-1392-S13789296892000031300000). Remove oil pan, oil pump, oil pump pick-up, oil baffle, main bearing bolts, oil manifold bolts, oil manifold and upper/lower crankcase bolts.
2. Working on either side of crankcase, separate crankcase halves by alternately prying in grooves provided until lower crankcase is free of dowel pins. Remove lower crankcase. (Scheme 7)
3. Remove rear main seal and discard. Remove lower main bearings from lower crankcase. Remove upper main bearings by rolling out with aluminum pin inserted in oil hole of crank journal.

1. Install lower main bearing into lower crankcase. Install upper main bearing into upper crankcase. Ensure upper bearing has oil transfer hole. Roll bearing into position so lock tang engages crankcase slot. Bearing must fit flush with crankcase. No undersize bearings are available, and no crankshaft grinding is allowed.
2. Inspect upper crankcase seal to ensure it is in position in crankcase. Seal must not be torn, nicked or out of groove over its entire length on both sides of crankcase.
3. Clean block groove. Start seal at both ends and work seal into groove toward center. Apply a thin bead of Gasket Maker (1052942) parallel to seal running through the centerline of bolt holes but not in bolt holes. (Scheme 8) Install crankshaft. Lower crankcase over dowels. Wiggle into installed position.
4. Install oil manifold. Install 20 main bearing bolts (inboard bolts have stud heads). Install 10 oil manifold bolts. Install 8 upper-to-lower crankcase bolts. Tighten bolts to specification. See «TORQUE SPECIFICATIONS»(ref-1392-S09285118392000031300000) table. (Scheme 9)
5. Check crankshaft end play. End play should not exceed.019" (.50 mm). Install oil baffle and 10 nuts. Tighten to specification. See «TORQUE SPECIFICATIONS»(ref-1392-S09285118392000031300000) table.
6. Install oil pump pick-up and NEW "O" ring. To complete installation, reverse removal procedure.

Scheme 7

Scheme 8

Scheme 9

1. Remove transaxle. See appropriate TRANSMISSION REMOVAL & INSTALLATION article in TRANSMISSION SERVICING. Remove flexplate.
2. Preferred method of seal removal is by drilling a 1/8" hole in metal seal body and removing with a body dent puller (slide hammer).
3. Seal removal with a screwdriver blade between seal lips and crankshaft is also possible, but extreme care is required to avoid damage to crankshaft sealing surface.

1. Place a small dab of RTV sealant at crankcase split line between upper and lower cases. Lubricate seal lips with engine oil, and slide seal over arbor of Seal Installer (J-38817).
2. Thread seal installer into crankshaft flange, and install seal by turning handle until installer bottoms against crankshaft. To complete installation, reverse removal procedure. Use NEW flexplate bolts.

1. Drain the cooling system.
2. Disable SIR. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(ref-33460-S02574795082001051100000) .
3. Move forwarding discriminating sensor out of way.
4. Remove air cleaner assembly.
5. Disconnect negative battery cable.
6. Remove headlight cover panel.
7. Remove left-hand engine support torque struts.
8. Position radiator inlet hose aside.
9. Disconnect upper transmission oil cooler line.
10. Disconnect electrical connectors from cooling fans.
11. Remove 4 fan mounting bolts and remove fans.
12. Disconnect radiator outlet hose from radiator.
13. Disconnect oil cooler lines from right radiator end tank. Disconnect remaining transmission cooler line from left radiator end tank.
14. Remove right-hand engine support torque strut.
15. Remove upper radiator support screws and remove radiator from vehicle.

1. To install, reverse removal procedure.
2. Enable SIR. See «DISABLING & ACTIVATING AIR BAG SYSTEM»(ref-33460-S02574795082001051100000) .
3. Refill cooling system.

1. Remove the hood latch bracket.
2. Drain the engine coolant.
3. Remove the headlamps. Remove the upper filler panel. Remove 2 bolts retaining the headlamp to the headlamp mounting bracket. Pull the headlamp straight forward in order to disengage the locator pin at the outboard edge of the headlamp. Disconnect the headlamp connector from the forward lamp wiring harness. Remove the headlamp from the vehicle.
4. Remove the air cleaner. Remove the coolant surge inlet hose from the throttle body to surge tank (coolant recovery tank). Remove the air cleaner cover. Remove the IAT sensor connector from the IAT sensor. Loosen the intake air duct clamp at the Mass Air Flow (MAF) sensor end of the duct. Disconnect the intake air duct from the MAF sensor. Inspect the air cleaner element. Remove any loose debris that may be found laying in the base of the air cleaner. Remove the trim panel in front of the air cleaner cover to gain access to the bolts. Remove the bolts from the assembly. Remove the PCM from the PCM Air Box.
5. Remove the condenser mounting bolts.
6. Remove the radiator brackets.
7. Disconnect the upper and lower engine oil cooler hose from the radiator.
8. Disconnect the transmission cooler lines from the radiator.
9. Disconnect the outlet radiator hose from the engine.
10. Disconnect the upper inlet hose from the engine.
11. Tilt the radiator forward. Disconnect the electrical connectors from the cooling fans.
12. Remove the cooling fan assembly from the radiator.
13. Disconnect the generator inlet cooler hose from the radiator.
14. Remove the outlet radiator hose from the radiator.
15. Remove the inlet radiator hose from the radiator.
16. Remove the radiator.

1. Install the cooling fan assembly to the radiator.
2. Install the inlet radiator hose to the radiator. Install the outlet radiator hose to the radiator.
3. Install the radiator to vehicle. Connect the generator inlet cooler line to the radiator.
4. Connect the electrical connectors to the cooling fans.
5. Connect the lower radiator hose to the engine. Install the upper radiator hose to the engine.
6. Install the air cleaner. IMPORTANT: An improperly installed air cleaner or a distorted or missing intake air duct may cause at DTC to set. Ensure that the air cleaner assembly and intake air duct is installed correctly and that there are no kinks or folds in the intake air duct. Debris in the air cleaner assembly or MAF sensor inlet screen that may distort air flow can set a DTC. Install the PCM into the air inlet housing. Install the bolts from the assembly. Install the trim panel in front of the air cleaner cover. Install a new air filter element. IMPORTANT: The outlet of the air cleaner assembly and the MAF sensor inlet duct must be lined up when completely installed. Misalignment may cause incorrect air flow readings resulting in MIL illumination or a driveabilty concern. Pivot the air cleaner cover and duct assembly until the latches and cover engage in the air cleaner element base. Inspect to be sure that both latches latch. Install the intake air duct over the MAF sensor, being careful to ensure that the intake air duct is secure around the entire outer edge of the MAF sensor. Connect the IAT sensor connector (1) to the IAT sensor. Install the coolant surge inlet hose from the throttle body to surge tank (coolant recovery tank). Install the air cleaner cover.
7. Connect the upper and lower engine oil cooler hose to the radiator.
8. Connect the transmission cooler lines to the radiator.
9. Install the radiator brackets. Install the condenser mounting bolts.
10. Install the hood latch bracket.
11. Install the headlamps. Install the headlamp to the vehicle. Connect the headlamp connector to the forward lamp wiring harness. Position the outboard portion of the headlamp in order to align the locator pin with the headlamp mounting bracket. Press the headlamp rearward in order to engage the locator pin with the headlamp mounting bracket. Install the 2 bolts that retain the headlamp to the headlamp mounting bracket. Install the upper filler panel.
12. Fill the cooling system. Check the transmission fluid.