Question 1

How to replace the engine front timing cover on GMC Sierra 1500?

Accepted Answer

To replace engine front cover, ensure that the Water Pump, crankshaft balancer, and Oil Pan are removed and then removed the engine shield bolts and shield. Remove the clip of the engine wire harness from the front cover and remove the crankshaft position (CKP) electric connector . Take off the bolt attached to the ckp sensor and the sensor itself, dispose of the ckp sensor o-ring seal. Unplug the engine wiring harness electrical connector from the camshaft position (CMP) sensor wiring harness jumper, then, take off the cmp sensor bolt and take out the cmp sensor and the wiring harness jumper from the engine front cover. Unplug the cmp sensor's wiring harness jumper from the cmp sensor, take cmp sensor off the wiring harness jumper. Next, take off front cover bolts and dispose of the front cover while removing front cover carefully to clean all sealing surfaces before installing a new covering. Replace the front cover bolts, fastening it to 12 n.m (106 lb in), do not reuse the original o-ring seal. If the old cmp sensor is to be reinstalled; install a new o-ring seal onto the sensor and install the cmp sensor on the wire harness jumper and connect the cmp sensor wire harness jumper to the cmp sensor. Apply clean engine oil to the o-ring seal and then mount the cmp sensor and wiring harness jumper to the engine front cover, tight in place the cmp sensor bolt by 10 n.m (89 lb in). Join the engine wiring harness transformer from the cmp sensor wiring harness jumper. Make sure not to use the original ckp sensor angle wire seal again. Fresh engine oil to lubricate a new ckp sensor o-ring seal and fit it to the ckp sensor with the bolt to 8 n.m (71 lb in) tight. Ensure that the sensor is fully seated before tightening the bolt to 8 n.m (71 lb in). Connect the ckp sensor electrical connector and the engine wire harness clip to the front cover. Lastly, the engine shield and bolts should be installed and tightened to 20 n. M (15 lb ft), then the Oil Pan, crankshaft balancer and Water Pump.

Question 2

How to replace the engine front timing cover on GMC Yukon?

Accepted Answer

If you are to change the engine front cover, remove the Water Pump and crankshaft balancer first. Unplug the cmp sensor wire harness from cmp actuator magnet and the engine harness from cmp sensorarness. The next step is to remove Oil Pan to front cover bolts and front cover bolts (501), after which the front cover (502) should be removed along with its gasket (503) which should be discarded. Strip the crankshaft front oil seal off it and in case of changing the engine front cover take off the cmp sensor wire harness and bolts and disconnecting it from the cmp sensor off and besides taking off the cmp sensor wire harness and the cmp sensor (703) and cmp actuator magnet bolts (751) and magnet (752) but discarding cmp actuator magnet gasket (753). For installation, do not use the reused crankshaft oil seal or the front cover gasket and do not apply the sealant to the front cover gasket in the absence of instructions. Use the en-48853 front cover alignment tool which will adjust the crankshaft front oil seal properly. Install a new cmp actuator magnet gasket (753), put the cmp actuator magnet (752) and bolts (751) on and tighten them to 12 nm (106 lb in) check the cmp sensor o-ring seal (704) for damage, lubricate its o-ring with clean engine oil and install the cmp sensor (703). Mount the cmp sensor wire harness to the front cover, attach it to the compressor pressure sensor, tighten the cmp sensor wire harness bolts to 12 nm (106 lb in), and apply gasket between the wire harness and the front cover. Put a 5 mm, 20 mm 0.20in,0.80in length bead of sealant on the Oil Pan, the Oil Pan to engine block junction ,and then to position the new engine front cover gasket (503) and front cover (502) on the engine. Putting in front cover bolts (501) until snug in sequence avoiding overtightening, oil pan to front cover bolts in finger-tight sequence. Install the crank shaft balancer bolt partially tight then tighten the Oil Pan to front cover at 25 nm (18 lb ft) then tighten the engine front cover bolts at 25 nm (18 lb ft). Unplug the tools, place the cmp sensor, and connect the engine harness electrical connector to the cmp sensor wire harness electrical connector and the Camshaft Position Sensor wire harness electrical connector to the cmp actuator magnet. Finally, seal a new crankshaft front oil seal and also the Water Pump.

OEM GMC Timing Cover

72 Timing Covers found

GMC Timing Cover, Front Part Number: 14090022

GMC Timing Cover Part Number: 89017261

GMC Timing Cover, Front Part Number: 12688896

GMC Timing Cover Part Number: 12687775

GMC Front Cover Part Number: 55512356

GMC Front Cover, Upper Part Number: 55514491

GMC Timing Cover, Front Part Number: 12691696

GMC Rear Cover, Lower Part Number: 55515618

GMC Timing Cover Part Number: 12671403

GMC Timing Cover, Front Part Number: 12704639

GMC Rear Cover Part Number: 12731559

GMC Front Cover Part Number: 12716029

GMC Front Cover Part Number: 55489569

GMC Timing Cover, Front Part Number: 12690012

GMC Front Cover Part Number: 12728654

GMC Timing Cover, Front Part Number: 12691693

GMC Timing Cover, Front Part Number: 12624280

GMC Timing Cover, Front Part Number: 12652364

GMC Water Pump, Front Part Number: 12693557

GMC Rear Cover Part Number: 55512224

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