22 · Diagnostics

Engine coolant consumption

Make: Alfa Romeo
Model: GT Factory Service Manual
Year: 2003–2010
Section: Consumption /leaks/ wear › Engine coolant consumption

‹ Prev Excessive oil consumption Next › Engine coolant leaks

Fault diagnosisEngine coolant consumption

ENGINE COOLANT CONSUMPTION

1.9 JTD 16V

The engine coolant consumption is high.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	First visually inspect the cooling system to check that there are no coolant leaks.	Continue to Step 1	There are leaks	Continue according to the instructions for the See table See table X10 ENGINE COOLANT LEAKS
1	COOLING SYSTEM LEAKAGE CHECK	All OK	Problems met	Operation
	Connect the test equipment replacing the expansion tank cap, pressurize the system to a value of slightly below 1.4 bar and check that the pressure remains at the recommended value for a few minutes and that there are no visible leaks. Op. Op. 0510C30 COOLING SYSTEM - TIGHTNESS TEST	Continue to Step 3	Fall in pressure detected with no visible leaks	Continue to Step 2
		Continue to Step 3	Fall in pressure detected with visible leaks	Continue according to the instructions for the See table See table X10 ENGINE COOLANT LEAKS
2	CHECKING CYLINDER HEAD	All OK	Problems met	Operation
	Remove the head Op. Op. 1016C10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL Check: That the planarity of the cylinder head plane is correct That the planarity of the cylinder head support surface on the cylinder block is correct	Continue to Step 9	Cylinder head plane defective	Regrind the cylinder head plane Op. Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
			Cylinder block/crankcase plane defective	Regrind the cylinder block/crankcase plane
			Planes correct, head gasket faulty	Replace the cylinder head gasket Op. 1016B10
3	Continue as instructed by the tester	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

1.8 T.SPARK, 2.0 JTS, 3.2 V6

The engine coolant consumption is high.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Bleed the air and check that the fault no longer occurs Check whether there are white exhaust fumes	End of diagnosis	The fault is still present	Continue to Step 1
		End of diagnosis	There is white smoke in the exhaust	Continue to Step 4
1	CAP EFFICIENCY CHECK	All OK	Problems met	Operation
	Check the efficiency of the cap	Continue to Step 2	Cap not working properly	Replace the cap
2	SYSTEM LEAKAGE CHECK	All OK	Problems met	Operation
	Check the cooling system for leaks Op. Op. 0510C30 COOLING SYSTEM - TIGHTNESS TEST	Continue to Step 3	There are coolant leaks	Continue according to the instructions in See table See table X10 ENGINE COOLANT LEAKS
3	BUBBLING CHECK	All OK	Problems met	Operation
2.0 JTS	Check that there are no bubbles or oil in the coolant reservoir	Continue to Step 4	Presence of fluid bubbling: cylinder head gasket damaged	Replace the seal Op. Op. 1016C10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
3.2 V6	Check that there are no bubbles or oil in the coolant reservoir	Continue to Step 4	Presence of fluid bubbling: head gaskets damaged	Replace the gaskets Op. 1016D11
4	CYLINDER HEAD HYDRAULIC SEAL CHECK	All OK	Problems met	Operation
2.0 JTS	Check the hydraulic seal of the cylinder head Op. 1016C04	Continue to Step 5	Seal ineffective	Replace the cylinder head Op. 1016C20
3.2 V6	Check the hydraulic seal of the cylinder heads Op. 1016D04	Continue to Step 5	Seal ineffective	Replace the cylinder heads Op. 1016D30
5	ENGINE MONOBLOC HYDRAULIC SEAL CHECK	All OK	Problems met	Operation
	Check the hydraulic seal of the engine monobloc	Continue to Step 6	Seal ineffective	Seal ineffective Op. Op. 1004E20 ENGINE - DISMANTLE AND RE-BUILD FOLLOWING OPERATION 1004E10 - WASH AND CHECK DISMANTLED PARTS - RE-FIT CYLINDER HEAD AND OIL SUMP - DOES NOT INCLUDE REPAIRS TO CYLINDER HEAD AND AUXILIARY UNIT
6	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

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Parts & tools for this job For 2003 Alfa Romeo GT

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