All Things Mk5 > How to Guides / Troubleshooting

Ed30 Temp Gauge Drop When Coasting

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GrayMK5GTI:
Afternoon All,

I collected my Ed30 on saturday and in general its running really well, still feels very tight  :smiley:

However. . . although it warms up quickly (definetly quicker than my K03 GTI did), and holds 90 degrees on the gauge when driving, if i take my foot off and coast down to a roundabout the water temp gauge drops a little bit - more noticable when coasting from 60mph to a standstill. When I accelerate away again it goes back up to 90 degrees quickly.

I did 200+ miles on the motorway over the weekend and whilst driving it held a solid 90 degrees still.

I've done a quick search, but most thermostat / temp sensor issues were about the car either taking a long time to warm up, or the fans coming on all the time, neither of which are similar to my issue.

For clarity, its got no fault codes, coolant is clean and full, Cambelt & water pump replaced by last owner in 2012.

Any ideas? does this sound normal for an Ed30?

Thanks,

Gray  :happy2:

V2 FAN:
Hi Mate

Not noticed any change in temp on mine, it holds a steady 90 until switched off  :happy2:

GrayMK5GTI:
Thanks matey!

Is yours an Ed30? I heard they have different thermostats to a GTI. Was hoping to pin it on that  :sad1:

It's looking like the thermostat is not working 100% right then.

skard:
I have thermostat coming which I am putting on at the same time as a new timing belt.

The BYD (ED30) has a different stat according to ETKA - 06F121111H same price about £30

doylebros:
This could be the auxiliary coolant pump running unnecessarily

http://www.ebay.co.uk/itm/VW-GOLF-MK5-GTI-04-09-2-0-TFSI-AUXILLARY-SECONDARY-WATER-PUMP-1K0-965-561-G-/231085460592?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item35cdc44c70

Chassis number dependant part number 1K0 965 561 G - price £136.93 full retail inc vat from the dealers.

Get it scanned to see if any sensors are faulty causing it to run?

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