X12 ENGINE OIL LEAKS - Alfa - 166 - eLearn

3308747 - X12 ENGINE OIL LEAKS

A leak of engine oil can be seen with dripping and/or fouling of the engine

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily carry out a visual inspect to locate the component or area which is leaking.If the visual inspection is not sufficient, wash the engine, dry it and cover the parts involved in talc: road test the vehicle to identify the leak	No leak identified: Continue to Step 1	Leak identified	Move on directly to the step involved
1	DRAIN PLUG CHECK	All OK	Problems met	Operation
	Check the condition and the seal of the oil drain plug	Continue to Step 2	Tightening of drain plug not correct	Restore the correct tightening Op. 1020A30
2	OIL SUMP CHECK	All OK	Problems met	Operation
	Verify: the condition of the oil sump, the seal of the sealant between the sump and the crankcase that the bolts fixing the sump are correctly tightened	Continue to Step 3	Oil sump damaged or distorted	Replace the oil sump Op. 1020A20
		Continue to Step 3	Lack of sealant or tightening not correct	Restore the correct tightening Op. 1020A20
3	OIL FILTER CHECK	All OK	Problems met	Operation
	Verify: the condition of the oil filter the seal and condition of the gasket	Continue to Step 4	Oil filter damaged or distorted	Replace the oil filter and the gasket Op. 1084B30
4	OIL PRESSURE RELIEF VALVE CHECK	All OK	Problems met	Operation
	Check the condition of the oil pump pressure relief valve	Continue to Step 5	Valve stuck in closed position	Replace the oil pump Op. 1084B16
5	ENGINE GASKETS CHECK	All OK	Problems met	Operation
	Gain access to the crankshaft and camshaft gasketsCheck the seal of these gaskets	Continue to Step 6	Crankshaft gaskets damaged	Replace the gaskets involved (see ENGINE OVERHAUL, Subassembly 1024)
		Continue to Step 6	Camshaft gaskets damaged	Replace the gaskets involved (see ENGINE OVERHAUL, Subassembly 1036)
6	HECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'