GolfGTIforum.co.uk
Model specific boards => Golf mk7 => Topic started by: Carbon VW on 11 January 2018, 19:32
-
I noticed driving home yesterday that my coolant temp gauge was jumping between 80-90 degrees C. One time I would look it would be 80, the next sat in the middle at 90c. It never budged from 90 before this. I also noticed at the same time that the oil temp is running very low. It usually settles at around 102-105 degrees C but it is now between 77-80 max. The car is fully up to temperature with these readings. Economy has not suffered according to the MFD. car seems to be running fine. All levels and fluids checked and all ok. I suspected thermostat/water pump but I’m confused as to why the oil temperature is also very low.
Any thoughts would be interested. Car is August 2013 Mk7 GTi with 50,000km on the clock.
-
I don't know if this is the same thing, but over on the TT forum, this issue raises its head all the time, especially on MK1 TTs. and its either the coolant temp. sensor, which on a MK1 TT is straight forward to change, or if that doesn't work, it's the thermostat. Is the car still under warranty? If so take into the dealers and get them to sought it out.
-
Thanks for that. Yes I’m hoping it’s a temp sensor. Would that explain the low oil temp also? The car is out of warranty.
-
Does it throw any faults?
Oil temp would have its own sensor, so looks like it really does not warm up fully.
You say kilometers..... where are you based?
-
Does it throw any faults?
Oil temp would have its own sensor, so looks like it really does not warm up fully.
You say kilometers..... where are you based?
Ireland.
-
Hi yes Ireland. Haven’t scanned with VCDS yet. Heating inside car (blower) is working fine so that would tell me the thermostat is not to blame ? It’s just very strange that the oil temp is reading so low also. I will update once I know more.
-
I have been having these exact symptoms for the past two weeks. The water temp fluctuating between 75-90, oil running cool and the heater blowing hot air in the cabin as usual.
I have noticed a big increase in fuel consumption on mine though. My average mpg has dropped from 29 to 26.5 with no changes to my driving style/distances covered, just more stops at Shell than to usual.
Car is showing no fault codes when I scan it either.
I've had the water pump off and inspected but the garage said it was fine. They have replaced the coolant and I topped it up the following day after it had all settled overnight. Being family friends, they were against just going ahead and replacing the thermostat as they weren't sure it would resolve the problem for me.
Mine is also a 2013 model, out of warranty but with more miles under her belt than yours - 76k! Which is why I thought it could be the water pump.
Today I did the 16 miles journey back from my girlfriends without the heating on and it seemed to be fine. I then turned the heating on a couple miles from home and it started to drop in temperature again.
Not sure what to do, so as you said, let us know how you get on
-
Yes that is the exact same symptoms as I am experiencing. It’s disappointing really from a 4.5year old car. Whatever the mileage covered. I have my car booked into my local Indy VW expert tomorrow night . He has already said over the phone he suspects coolant temp sensor. I will let you know what happens.
-
Notice my coolant was low and had to top up 100ml yesterday. Took it into the dealer and the Service Manager (different dealer from my last service) did notice though that the expansion tank filler cap hadn't been screwed on correctly. On my Mk7 it gets tight and you think you're going to cross thread it but you keep tightening until you get the audible click. The Service Manager put some grease on the nylon thread of the cap and refitted. I mentioned about the discoloration of the expansion tank compared to my 67 plate Golf, but he said it was down to coolant gases over last 4 yrs and the coolant and tank looked all OK.
-
Yes that is the exact same symptoms as I am experiencing. It’s disappointing really from a 4.5year old car. Whatever the mileage covered. I have my car booked into my local Indy VW expert tomorrow night . He has already said over the phone he suspects coolant temp sensor. I will let you know what happens.
How did you get on?
Mine is still dropping off but not as frequently as before now that the coolant has been changed.
If I don't use the heater inside (fortunately I have heated leather) it sits at 90 just fine. Then when I turn the climate control on, hot air comes in as expected but then the water temp dips again.
-
Booked in to stealer for Wednesday. Car will now have to be towed there. Check engine light on. Cabin heat not working. Coolant temp at zero constantly. Oil temp not even registering anything. Stop start fail. Nursed it home from work today. Hope I didn’t do any damage.
-
Booked in to stealer for Wednesday. Car will now have to be towed there. Check engine light on. Cabin heat not working. Coolant temp at zero constantly. Oil temp not even registering anything. Stop start fail. Nursed it home from work today. Hope I didn’t do any damage.
Wow, what happened?! Sorry to hear that. You must be seething. :sad:
-
Booked in to stealer for Wednesday. Car will now have to be towed there. Check engine light on. Cabin heat not working. Coolant temp at zero constantly. Oil temp not even registering anything. Stop start fail. Nursed it home from work today. Hope I didn’t do any damage.
If you didn't have a red dash warning, you should be OK. Yellow means get attention, red means stop and turn off.
-
Carbon VW, check your own "my message" box on this site.
I sent you email on 11 Jan when you first posted, covering what appears to be VW policy on this issue. I don't know if you saw it?
-
Carbon VW, check your own "my message" box on this site.
I sent you email on 11 Jan when you first posted, covering what appears to be VW policy on this issue. I don't know if you saw it?
Please can you let me know this info too, also having the same problems with mine.
-
My mk6 does this every winter , fine in the summer :whistle:
-
Engine running cooler than normal could be thermostat having failed/stuck open. FI then compensates for what it sees as a cold engine richening the mixture and the fuel economy drops away to sh!t.... Coolant loss/leaks normally cause the engine to run hotter than norm running the risk of overheating as the coolant level drops below the minimum.
-
My mk6 does this every winter , fine in the summer :whistle:
How odd. Mine didn't do this last winter....
-
Thanks club sport. Hadn’t seen the message. It’s the orange CEL I have. Think I will chance the 100km trio to the dealer Wednesday morning. She can stay in the garage until then.
-
Just a quick update on my problem. Turned out to be faulty temperature sensors. Dealer said that 2 temperature sensors were faulty and had to be replaced. Didn’t get any goodwill from VW Ireland but did get a span new (9km on the clock) Golf 1.6tdi as courtesy car. :smiley:Nice car. I felt bad thrashing it on the drive home on the muddy roads. Collecting car on Friday ! :cool:
-
Just got a call from the dealers saying they took it out for a test drive after replacing the sensors and the problem is still there. They now say the thermostat is the problem and that it will cost an additional €600 for the part. :angry: :angry: these dealers really are worse than useless at diagnosing problems. I told them I wouldn’t be paying anything near that figure for the part and to talk to the warranty manager and ring me back. I won’t be seeing my car until next week now at the earliest. :embarrassed:
-
Unfortunately as expected, you know the score, play hard ball.... Good luck!
-
I feel your pain, but surely you are out of warranty?
Owning these modern computer controlled cars after warranty is a potentially expensive thing...
-
Thermostat housing was cracked and the whole unit was replaced and WP refitted. Including the 2 temperature sensors they replaced the bill was €600 with 50% goodwill included ! I also left having bought the wife a 151 white Passat highline with LEDs and massage seats ! I’m a sucker for punishment. :whistle:
Glad to have my GTi back.