Audi A4 quattro, 1.8T, 2001 year model with auto transmission. Coolant temperature rising to maximum mark instead of staying @ mid mark. Coolant level is ok & radiator fan appeared to be blowing well.
Please what could be the problem? The mechanic is already suggesting removal of thermostart, but i suggested replacement if established the thermostat is bad.
Any input from the forum could help. Thank you.

The mechanic removed the thermostat, though we're yet to test it. The car was driven for up 2 miles distance, coolant temperature heating maximum, no evidence of coolant boiling.
Anybody with idea, please help oh!!!

Could it be the temperature switch is malfunctioning?

Removing without replacing d thermostat is wrong.

Meanwhile, I suggest u let d engine run idle till d temperature exceeds 90 C . Note d temperature when d fan blows.

If d fan blows from a cold start (which many mechanics indulge in), den dis cud be a rewire`s issue.

Also check the radiator for blockage.

kc007: The mechanic removed the thermostat, though we're yet to test it. The car was driven for up 2 miles distance, coolant temperature heating maximum, no evidence of coolant boiling.
Anybody with idea, please help oh!!!

CHANGE MECHANIC.... you seem to have answered your own question.

Any mechanic that is bent on removing thermostat in a bid to resolving over-heating problem is not qualified work on vehicles.

Pls wash your radiator and ensure there is no leak anywhere, that may just be d solution to the issue.
Radiator blockage can be a cause of overheating

aiso_g: Pls wash your radiator and ensure there is no leak anywhere, that may just be d solution to the issue.
Radiator blockage can be a cause of overheating

There's no pure evidence of engine overheating. The pointer of coolant temperature metre is reaching maximum and this is not commensurate with temp @ engine bay. No escape of coolant noted. Could it be a malfunctioning CTS?

Oga this your post here don't have connection to the help i'm seeking from the forum.

Where are Siena, Car-doctor, Ikenna, Zim Drill & co to help solve this problem? Or is this not worth their contributions?

why not post your enquiry on www.nairaland.com/810561 That will probably get you Siena's attention fast, just an advise sha o.

kc007: Audi A4 quattro, 1.8T, 2001 year model with auto transmission. Coolant temperature rising to maximum mark instead of staying @ mid mark. Coolant level is ok & radiator fan appeared to be blowing well.
Please what could be the problem? The mechanic is already suggesting removal of thermostart, but i suggested replacement if established the thermostat is bad.
Any input from the forum could help. Thank you.

I took the car for scan after erratic temp display continued & the following codes were pulled:
1. Engine coolant temp sensor(G62): Signal too low. P0117. Static - no indication on display.
2. Please check DTC memory of instrument cluster. P1654 - intermittent
3. Random multiple cylinder misfire dtected. P0300 - intermittent.
4. Cylinder 2 misfire detected. P0302 - intermittent
5. Cylinder 1 misfire detected P0301.
Initial search of the CTS wasn't successful. Pls anybody with information on how to get it can indicate. I'm based in Enugu.

you might need to bleed your radiator,theere might be air bubbles trapped in the system preventing water from going thru

Igorance, WHy remove a themostart from ur car? you think it got no use eh? go and replace it

erico2k2: Igorance, WHy remove a themostart from ur car? you think it got no use eh? go and replace it

It was a kind of troubleshooting. Now it has been estalished the thermostat is working fine, it'l be fixed back ASAP.

kc007:
It was a kind of troubleshooting. Now it has been estalished the thermostat is working fine, it'l be fixed back ASAP.

Good,never ever remove without replacing,every part in a car is usefull.