Service diagnosis-mechanical. Service diagnosis-lubrication

2. Thin or diluted oil.

3. Low oil pressure.

4. Dirt in lash adjusters.

5. Bent push rods.

6. Worn rocker arms.

7. Worn tappets

8. Worn valve guides.

9. Excessive runout of valve seats on valve faces.

2. Change oil and filter.

3. Check oil pump, if Ok, check rod and main bearings for excessive wear.

4. Clean lash adjusters.

5. Replace as necessary.

6. Replace as necessary.

7. Replace as necessary.

8. Refer to Valve Service in this section.

9. Service valves and valve seats.

Refer to Valve Service in this section.

2. Low oil pressure.

3. Thin or diluted oil.

4. Excessive bearing clearance.

5. Connecting rod journal out-of-round.

6. Misaligned connecting rods.

2. Refer to Group 0, Lubrication and maintenance.

3. Change oil and filter.

4. Replace as necessary.

5. Service or replace crankshaft.

6. Replace bent connecting rods.

2. Low oil pressure

3. Thin or diluted oil.

4. Excessive bearing clearance.

5. Excessive end play.

6. Crankshaft journal out-of round.

7. Loose flywheel or torque converter.

2. Refer to Group 0, Lubrication and maintenance.

3. Change oil and filter.

4. Replace as necessary.

5. Check No. 3 main bearing for wear on flanges.

6. Service or replace crankshaft.

7. Tighten to correct torque

(a) Misaligned or damaged.

(b) Loose fasteners, broken or porous metal parts.

2. Crankshaft rear seal

3. Crankshaft seal flange.

Scratched, nicked or grooved.

4. Oil pan flange cracked.

5. Timing chain cover seal, damaged or misaligned.

6. Scratched or damaged vibration damper hub.

(a) Replace as necessary.

(b) Tighten fasteners, Repair or replace metal parts.

2. Replace as necessary

3. Polish or replace crankshaft.

4. Replace oil pan.

5. Replace seal.

6. Polish or replace damper.

2. Faulty oil pressure sending unit.

3. Low oil pressure.

4. Clogged oil filter.

5. Worn oil pump.

6. Thin or diluted oil.

7. Excessive bearing clearance.

8. Oil pump relief valve stuck.

9. Oil pump suction tube loose or damaged.

2. Replace sending unit.

3. Check pump and bearing clearance.

4. Replace oil filter.

5. Replace as necessary.

6. Change oil and filter.

7. Replace as necessary.

8. Clean or replace relief valve.

9. Replace as necessary

2. Carbon in oil ring slots.

3. Incorrect ring size installed.

4. Worn valve guides

5. Leaking intake gasket.

6. Leaking valve guide seals.

2. Replace rings.

3. Replace rings.

4. Ream guides and replace valves.

5. Replace intake gaskets.

6. Replace valve guide seals.