To all the knowledgeable Vauxhall owners, help needed please with a overheating problem we have with my sons 2011 reg 1.2 corsa D which is overheating.
I have done internet searches but nothing i have dug up quite matches our problem, i will give as much info as i can and fingers crossed someone can point us in the right direction.
Ok here goes, this is what i have established so far –
I have accessed the secret menu and monitored the engine temperatures from cold.
When the engine is started the temperature rises over a 30/40 minute period to around 90/95 degrees, the engine cooling fan does not run.
Another 10 mins the temperature rises to around 100/105 degrees, still no fan.
A couple more minutes temperature reaches 107 degrees and the coolant starts bubbling and spilling out all over the engine from the safety blow off on the side of the expansion vessel, still no fan.
Oil is clean.
Water is clear.
Expansion bottle cap seems fine.
So the problem appears to be the fan not turning on and cooling the engine. I have checked the manual and have realised that when going through the above procedure that if i pull the two 30 amp fuses in the engine compartment (noted in the manual as fuse 8 & 9 engine cooling) when the engine is running and immediately reinsert them that the fan will start and the engine temperature drops as expected. This kick start of the fan happens at whatever temperature the fuses are pulled and reinserted.
I have also noticed that when i do this that
1 - the fan will now run constantly until the engine is stopped and once restarted the same problem of no fan and overheating returns.
2 – when the fuses are removed and reinserted that the dash light of a car with a spanner illuminates which the manual states is a issue with the engine or transmission. I am not concerned about point 2 as i would expect this to happen when the fuses are pulled and the light goes out when the engine is restarted.
So correct me if i am wrong but i believe i am right in saying that –
1 – fan works fine, but for whatever reason is not getting the message to start
2 – water pump is working fine as normal temperatures are restored when fan is overridden and temperatures rise steadily from cold as expected.
3 – no issues with gasket or cracked head as oil is clean, water is clean
So any ideas, i am thinking maybe faulty thermostat or sensor possibly.
Sorry for the long post and Thank you in advance, any help greatly appreciated.
I have done internet searches but nothing i have dug up quite matches our problem, i will give as much info as i can and fingers crossed someone can point us in the right direction.
Ok here goes, this is what i have established so far –
I have accessed the secret menu and monitored the engine temperatures from cold.
When the engine is started the temperature rises over a 30/40 minute period to around 90/95 degrees, the engine cooling fan does not run.
Another 10 mins the temperature rises to around 100/105 degrees, still no fan.
A couple more minutes temperature reaches 107 degrees and the coolant starts bubbling and spilling out all over the engine from the safety blow off on the side of the expansion vessel, still no fan.
Oil is clean.
Water is clear.
Expansion bottle cap seems fine.
So the problem appears to be the fan not turning on and cooling the engine. I have checked the manual and have realised that when going through the above procedure that if i pull the two 30 amp fuses in the engine compartment (noted in the manual as fuse 8 & 9 engine cooling) when the engine is running and immediately reinsert them that the fan will start and the engine temperature drops as expected. This kick start of the fan happens at whatever temperature the fuses are pulled and reinserted.
I have also noticed that when i do this that
1 - the fan will now run constantly until the engine is stopped and once restarted the same problem of no fan and overheating returns.
2 – when the fuses are removed and reinserted that the dash light of a car with a spanner illuminates which the manual states is a issue with the engine or transmission. I am not concerned about point 2 as i would expect this to happen when the fuses are pulled and the light goes out when the engine is restarted.
So correct me if i am wrong but i believe i am right in saying that –
1 – fan works fine, but for whatever reason is not getting the message to start
2 – water pump is working fine as normal temperatures are restored when fan is overridden and temperatures rise steadily from cold as expected.
3 – no issues with gasket or cracked head as oil is clean, water is clean
So any ideas, i am thinking maybe faulty thermostat or sensor possibly.
Sorry for the long post and Thank you in advance, any help greatly appreciated.
