Weird overheating problem

Asked by Joe Jul 31, 2019 at 03:38 PM about the Opel Astra

Question type: Maintenance & Repair

Car is overheating faster when the AC is turned on.
I did a radiator pressure test and there was no significant
drop in pressure over several hours.
There are no leaks.  No visible exhaust fumes. Oil is clean
no water is leaking into the oil. Small amount of coolant
can be seen under the plastic reservoid but not enough to
explain the great loss of coolant.
Fan works.
I have been refilling the reservoir tank with 1 to 2 liters of
water for every 100 kilometer driven while driving it
normally .
Pressure stays when the radiator cover is on.
Opel Astra J tourers sports 1.7 CDTI 109 HP 154000
kilometer

2 Answers

Cylinder head gasket broken maybe. So, water enters the engine and is being consumed.

306,945

The AC adds engine load and heat. You probably need to service the cooling system and you need to find and fix the leak. Make sure the cooling fans are working.

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