3.9L V6 Engine & 5.2L V8 Engine & 5.9L V8 Engine: Diagnosis Dodge Durango I

TROUBLE SHOOTING

Note. To trouble shoot mechanical engine components, see appropriate table in TROUBLE SHOOTING article in GENERAL INFORMATION.

Inspection

Check exhaust manifold mating surface warpage. On 3.9L or 5.2L engines, repair or replace exhaust manifold if warpage exceeds .004" (.10 mm) overall. Repair or replace exhaust manifold if warpage exceeds .008" (.20 mm) per 12" (305 mm).

Check cylinder head warpage. Repair or replace cylinder head if warpage exceeds specification. See CYLINDER HEAD table under ENGINE SPECIFICATIONS.

1. Remove front cover. See «FRONT COVER»(ref-97388-S20198330532001050300000) . Position ruler at camshaft sprocket, near timing chain link, to check timing chain stretch.
2. Place torque wrench on camshaft sprocket bolt. Apply 30 ft. lbs. (41 N.m) torque with cylinder heads installed, or 15 ft. lbs. (20 N.m) with cylinder heads removed, on camshaft sprocket bolt in direction of engine rotation. Note reading on ruler.
3. Apply same amount of torque in opposite direction and note amount of timing chain movement on ruler. If movement exceeds 1/8" (3.17 mm), replace timing chain.

Note. Cylinder block must be marked to indicate oversize valve lifters. See SPECIAL ENGINE MARKS .

Inspect components for damage. Measure lifter O.D. and bore diameter in cylinder block. Determine oil clearance. Clearance must be within specification. See VALVE LIFTERS table under ENGINE SPECIFICATIONS. Cylinder block can be bored for oversize lifters.

Inspect camshaft and camshaft bearings for wear. Measure camshaft journal diameter and camshaft bearing I.D. Replace camshaft or camshaft bearings if not within specification. See CAMSHAFT table under ENGINE SPECIFICATIONS.

1. Inspect components for damage. Using feeler gauge and straightedge, check pump cover flatness. Measure thickness of inner and outer rotors. Measure outer rotor outside diameter. Replace rotors if measurements are not as specified. See «OIL PUMP SPECIFICATIONS»(ref-97388-S22641379652001050300000) table.
2. Install outer rotor into pump body. Press outer rotor to one side, and measure clearance between outer rotor and pump body. Replace oil pump assembly if clearance exceeds specification. See «OIL PUMP SPECIFICATIONS»(ref-97388-S22641379652001050300000) table.
3. With outer rotor installed in pump body, install inner rotor and shaft into pump body. Measure rotor tip clearance between inner and outer rotors. Replace rotors if clearance exceeds specification. See «OIL PUMP SPECIFICATIONS»(ref-97388-S22641379652001050300000) table.
4. With rotors installed in pump body, place a straightedge (between bolt holes) across face of pump body. Measure rotor end clearance between rotors and straightedge. Replace oil pump assembly if clearance exceeds specification. See «OIL PUMP SPECIFICATIONS»(ref-97388-S22641379652001050300000) table.
5. Ensure relief valve slides freely in bore. Check free length and tension of relief valve spring. Replace spring if not within specification. See «OIL PUMP SPECIFICATIONS»(ref-97388-S22641379652001050300000) table.

OIL PUMP SPECIFICATIONS