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Front Cover: Removal & Installation GMC Envoy I

Mechanical 4 illustrations ~388 words

Removal

  1. Remove negative battery cable. Remove interior engine cover (if equipped). Remove upper and lower fan shrouds. Remove engine cooling fan. Remove crankshaft balancer bolt.
  2. Remove accessory drive belt(s) and water pump pulley. Remove crankshaft pulley bolts and remove crankshaft pulley from balancer. Using Damper Puller/Installer (J-23523-F), remove crankshaft balancer.
  3. Remove water pump. See «WATER PUMP»(ref-1456-S13136974142000031300000) .
  4. Disconnect Crankshaft Position (CKP) sensor harness connector. Remove CKP sensor bolt and CKP sensor. Loosen or remove oil pan as necessary for removal of front cover.
  5. Remove front cover bolts, front cover and gasket.

Installation

  1. On 4.3L, 5.0L and 5.7L, install NEW front cover and gasket. On 7.4L, front cover and front cover gasket are reusable. Replace only if damaged. Tighten front cover bolts to specification. See «TORQUE SPECIFICATIONS»(ref-1456-S30447198832000031300000) .
  2. On all models, coat crankshaft front cover oil seal lips with clean engine oil. On 4.3L, 5.0L and 5.7L, install NEW seal in front cover with seal lip facing engine using Seal Installer (J-35468). On 7.4L, install NEW seal in front cover with seal lip facing engine using Seal Installer (J-22102).
  3. Install CKP sensor. Tighten CKP sensor holddown bolt to specification. See «TORQUE SPECIFICATIONS»(ref-1456-S30447198832000031300000) .
  4. Apply RTV sealant to Woodruff keyway in crankshaft damper. Install crankshaft balancer using Damper Puller/Installer (J-23523-F). Install crankshaft balancer bolt and tighten to specification. See «TORQUE SPECIFICATIONS»(ref-1456-S30447198832000031300000) . To complete installation, reverse removal procedure.
  1. Remove front cover. See «FRONT COVER»(ref-1456-S09894237352000031300000).
  2. On 4.3L, 5.0L and 5.7L, remove CKP sensor reluctor ring. (Scheme 11)or (Scheme 12).
  3. On 7.4L, remove CKP sensor reluctor ring using Puller (J-8433-1) and Puller Plate (J-41371). (Scheme 13) On all models, rotate crankshaft until timing marks on camshaft and crankshaft sprockets are aligned. (Scheme 14) Remove camshaft sprocket and timing chain. To remove crankshaft sprocket, use Sprocket Puller (J-5825-A on 4.3L, 5.0L and 5.7L or J-28509 on 7.4L).

Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13
Scheme 13

Scheme 14

Scheme 14
Scheme 14
  1. Install Woodruff key in crankshaft (if removed). Using Crankshaft Sprocket Installer (J-5590 on 4.3L, 5.7L and 5.7L or J-22102 on 7.4L), install crankshaft sprocket. Install the camshaft sprocket and the timing chain. Make sure timing marks on sprockets are aligned. (Scheme 14) Install and tighten camshaft sprocket bolts to specification. See «TORQUE SPECIFICATIONS»(ref-1456-S30447198832000031300000) table.
  2. Install CKP sensor reluctor ring. Install front cover and gasket. See «FRONT COVER»(ref-1456-S09894237352000031300000). To complete installation, reverse removal procedure.

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