1.2L REVOTRON ENGINE 15 'Tapping' or 'ticking' noise from the top end of the engine Fuel injectors worn excessively Fuel injectors will make some ticking noise. Replace fuel injectors if not putting out enough fuel to cylinders. Excessively worn camshaft Inspect camshaft. lobes and runout for excessive wear. Replace as necessary. Valve springs, tappets, or rocker arms worn Inspect valve train components; replace as necessary. Exhaust System Condition Possible Cause Remedy Engine emits white smoke from tailpipe. Obstructed air filter or air Inlet Clean or replace air filter or Inlet. Head gasket leaking coolant into combustion chamber Inspect engine oil for coolant and perform engine compression test. Engine cylinder head or block cracked Inspect engine oil for coolant and perform engine compression test. Engine oil or other substance on exhaust manifold Inspect exhaust manifold for foreign material. Improper grade or contaminated fuel Rush fuel system with fresh, clean, fuel of the correct type. Replace fuel filter. Engine emits blue smoke from tailpipe. Worn or damaged valve guide seals Remove rocker arm cover and inspect valve guide seals. Replace as necessary. Engine crankcase overfilled with oil Check oil level; drain oil as necessary. Worn I damaged piston ring(s) or cylinder bore, permitting oil blowby Perform engine compression test and/or leak-down test. Head gasket leaking oil into combustion chamber Inspect engine coolant for oil and perform engine compression test. Engine emits black smoke from tail pipe. Excess carbon deposits in combustion chamber Remove carbon deposits in combustion chamber using a commercially available cleaner Excess fuel entering cylinder(s) Check lambda/O2 and other engine sensors for proper operation. Test fuel injectors for proper operation or leakage. Check the fuel and emissions system for proper operation. Exhaust rubber hanger wear / crack. Ageing of rubber hanger Check the Exhaust rubber hangers & replaced if found crack / damage or wear. Cooling System Condition Possible Cause Remedy Overheating Low coolant level/ Cooling system leaking Check coolant level in reservoir and inspect system for leaks. Add coolant as necessary.
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