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ENGINE PERFORMANCE DIAGNOSTIC TABLE CONDITION POSSIBLE CAUSES CORRECTION OIL LEAKS 1. Gaskets and O-Rings. - (a) Misaligned or damaged. (a) Replace as necessary. (b) Loose fasteners, broken or (b) Tighten fasteners, Repair or 2. Crankshaft rear seal 2. Replace as necessary. See 3. Crankshaft seal flange. 3. Polish or replace crankshaft. 4. Oil pan flange cracked. 4. Replace oil pan. See 5. Timing chain cover seal 5. Re-seal timing cover. 6. Scratched or damaged vibration 6. Polish or replace damper. OIL PRESSURE DROP 1. Low oil level. 1. Check and correct oil level. 2. Faulty oil pressure sending unit. 2. Replace sending unit. See REMOVAL. 3. Low oil pressure. 3. Check oil pump and bearing 4. Clogged oil filter. 4. Replace oil filter. See 5. Worn oil pump. 5. Replace oil pump. See 6. Thin or diluted oil. 6. Change oil and filter. 7. Excessive bearing clearance. 7. Replace as necessary. 8. Oil pump relief valve stuck. 8. Replace oil pump. See 9. Oil pick up tube loose, damaged 9. Replace as necessary. OIL PUMPING AT RINGS; SPARK PLUGS FOULING 1. Worn or damaged rings. 1. Hone cylinder bores and replace 2. Carbon in oil ring slots. 2. Replace rings. See 3. Incorrect ring size installed. 3. Replace rings. See 4. Worn valve guides. 4. Ream guides and replace 5. Leaking valve guide seals. 5. Replace valve guide seals. CONDITION POSSIBLE CORRECTION
2007 Dodge Nitro R/T 2007 ENGINE 3.7L - Service Information - Nitro
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