MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: Frenzy on November 15, 2014, 04:20:40 pm

Title: Coolant - How full?
Post by: Frenzy on November 15, 2014, 04:20:40 pm
How full is your reservoir with coolant?

I ask because mine currently sits at the black line above the black line which says min (so in other words min line plus about an inch and a half) and i don't know whether it should get a top up to be on the safe side.

I'm guessing that actually having this much coolant above the min line equates to quite a lot of normal driving miles.
Title: Re: Coolant - How full?
Post by: GrayMK5GTI on November 15, 2014, 04:23:45 pm
I kept mine at the top of those lines but Statllers filled it up to the middle line in the tank.
Title: Re: Coolant - How full?
Post by: howie1987 on November 15, 2014, 06:56:25 pm
I had mine done recently by audi and its above the lines.
Title: Re: Coolant - How full?
Post by: dansmith180 on November 15, 2014, 09:45:35 pm
I always have it half way between the lines or higher
Title: Re: Coolant - How full?
Post by: vRSAlex on November 16, 2014, 09:28:35 am
Min when cold, max when hot.
Title: Re: Coolant - How full?
Post by: th3_f15t on November 16, 2014, 09:41:50 am
I was always advised to fill it to just above minimum as it allows for an expansion of the fluid plus allows the pressure inside the system to remain stable. Too little space in the previous means not enough space for the build up of pressure when at high temperatures.
Title: Re: Coolant - How full?
Post by: Frenzy on November 16, 2014, 05:30:07 pm
Cheers for the replies fellas and thanks for the explanation th3_f15t.

So my coolant level is absolutely fine which means the 'STOP check coolant levels' message i get from the dash in cold weather is being caused by a dodgy sensor...? Anyone else had this?

cheers
Title: Re: Coolant - How full?
Post by: th3_f15t on November 16, 2014, 05:55:39 pm
Yeah, most likely a faulty sensor. A fault scan of the ECU will tell you, but nothing wrong with removing the sensor, cleaning the metal prongs and checking the wiring for any obvious damage. Cheapest solution first...