Temperature not hitting 90

MURRAYS444

MURRAYS444

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I’m experiencing some issues with my cars temperature when driving it doesn’t hit 90 and I’m now thinking that my thermostat is stuck open not allowing my car to hit 90 I left my car running to see if the car would hit 90 stationary and it does and sits at 90 and when driving it falls down towards the 70 mark I have opened the expansion tank to release any trapped air and nothing changed also the oil temperature seems to be low I’m thinking that the car is needing the thermostat replaced to cure the problem any help will be appreciated thanks and the cars a 2000 s4 b5
 
When its below 90 can you feel any heat in the rad or the in and out pipes to it ?If so the stat is stuck open or opening too soon
 
yeah there is heat to the rad and the fan is on checked the service history and the belts and water pump were replaced last may but no thermostat :shrug:
 
Unlucky. You'll most likely have to fork out for a full (and proper) cambelt service now including the thermostat. Why people don't do these as standard is beyond me. You hear so many people having this problem.

IIRC, there was one guy on here who managed to replace the stat without replacing his cambelt, but I think you are taking a risk by fannying around with taking the tension off the belt just in case a shaft does move even one tooth.
 
Aye thought so after reading the comments thanks guys, Aragorn do you know anywhere round here that would do the job cheap?
 
What will happen if you don't renew the thermostat? Do you get overheating issues? Genuine question, I'm just curious.
 
I think in my cars case is that the thermostat is stuck open allow the coolant to cool the engine down before it hits around 96 degrees to stop the engine over heating meaning the engine will not run at the optimum running temperature so I don't think the car will over heat just run at a lower temperature
 
And possibly overfuel because the ECU thinks the engine is constantly in a heating cycle.
 
audi upgrades
Mine gets up to 90C-93C ok [from aircom panel old 49 trick] and at 70mph in fifth stays there fine, drop a cog of go to 80mph plus [testing purposes officer] and it scuttles down to 70C ish, think stat is failing "safe".

Which is a fine way of enforcing the national limit!!!!

Have seen a youtube video where guy changed it from underneath as well.........
 
means a front end strip...just had to do my waterpump but left the thermostat as mine was sitting nicely at 90
 
Thanks for all the reply’s guys it’s really appreciated davy j I would try replacing the thermostat myself but I’m just worried about the belts looking for a garage in Edinburgh who would do it cheap!
 
Car is going into the garage next week to get the thermostat changed! Just started the car up and the fans were going anyone know why that would happen to an engine that is cold or will that be due to my thermostat being open too?
 
There's a guy up here in Perth, worked with VW for 15 years, been self employed VW/Audi/Seat/Skoda specialist for about 7 or 8 years now.
Crighton Donaldson, 01738 624036 not too expensive/hour, worth a shout if you are happy to head up the M90
 
Cheers for that i'll keep the number in mind if i'm needing any work done in the future
 
ImageUploadedByTapatalk1392068684527868 add that to your phone 👍
 
Got the car into the garage yesterday morning with a wee list of things to be done first of all is to get the thermostat replaced then get the awful fuel smell sorted also hit a pot hole the other day resulting in a knocking noise coming from the rear passenger side wheel also the airbag light has been on since last time it was in since the clutch was replaced fingers crossed its not going to break the bank:sadlike:
 
Get vcds on the airbag problem and see if you can reset it or if the controller has gone west.
 
Where is the fuel smell coming from? My old car randomly started leaking fuel at the fuel filter.
 
Not to sure its just when i'm sitting in traffic there is a really strong smell of fuel its been getting worse since I bought the car in September every time I drove it last week I kept on getting really bad headaches from it I told the garage to check the fuel filter as that is probably the cheapest fix
 
My 2.5 is a 2000, Murrays444, fuel pipes are getting a bit fragile. Had to repair the front end of the pipe as it had a pinhole under one of the rubbers, (10mm fuel pipe and clips from Pirtek) only cost a few quid, much better than £200 for new pipes)
 
cossie said:
How did you get on?
Click to expand...

The car is still in the garage I called on Friday for an update and the knocking noise from the rear was collapsed brakes should be picking up the car on Tuesday hopefully the car will be fixed fingers crossed tho
 
Get the car back tomorrow with the thermostat changed with the fuel filter and pollen filter just waiting for a new y pipe hopefully the car should be fixed this is how the car was looking today
 

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Got the car back and the temperature gauge is going up to 90 also the oil temperature is sitting better and the fuel smell has gone with the fuel filter and pollen filter being replaced!
 
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Take it back to the garage in the morning and tell them they must have broke it, as it wasn't like that prior to giving it to them, you may get it fixed as a freebie. No harm in trying mate, in the meantime I'd disconnect the battery, as long as that doesn't cause any more problem's. :sadlike:
 
Aye taking it back in the morning mate was woken up at 3 this morning with it going off and the alarm went off when I was driving down the road:-(
 
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Bet you turned a few heads, but for all the wrong reason's. Glad I'm not your neighbour, lol.
 
Aye the alarm wouldn't go off even when using the key I've had the beep beep beep ringing in my ears all day lol
 
cars back at the garage :( drove it up the M90 with the alarm going off lol got some funny looks
 
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