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Coolant temp spike after waterpump replacement

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Hi all. This is my first post so I'm sorry if I haven't got this in the right thread. Had my car from used at 28k miles. Bought online from cazoo and came with 3 month warrenty.

 

1 month after that expired had the dreaded overheating warning on dash and coolent temp spike into the red.

 

Turned on heater to full and slowed down and it went away and temp back to 90. 

 

This happened once more. Ten to garage as researched on here and suspected water pump failure. This was replaced and coolant flushed.

 

However this is still happening. Coolent temp hasn't hit red but on a cold start from overnight about 5 minutes in the ac heat blows cold and then the coolent temp spikes again to maybe 110....again slow down fiddle with ac heat and it reduces and then stays there for the rest of the day

 

Please help as I'm at my wits end after footing a hefty bill to fix water pump already. Now looking at a thermostat replacemebt and getting quoted 400! I'm worried the local independent (they did the waterpump) are just using trial an error here and its costing me a fortune

 

Really worried as love the car when it's working

 

It's mk3 1.4tsi Dsg

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Most of the water pump issues are with the 2.0tdi. I don't recall hearing about it on the 1.4. Doesn't mean it's not happened though. 

Another thing to be aware of is you actually had 6 months to take the car back to the supplier for them to have a chance at fixing. Possibly too late now as you have had someone else work on it but worth talking to them.

As for the current issue, take it back to the indy and get them to double check the coolant level. There was one on here over the weekend reporting similar and the garage hadn't done the purge to get rid of the air in the system.

  • Author

Hiya mate. Thabks so much for the comment. 

 

 

So with cazoo they are saying they only of cover warrenty for 3 months. The issue occurred after that so think I am stuck on that front. 

 

So the guy working on it had a look at it after water pump replacement and bleed the system to make sure no air locks and refilled the coolant.

 

It's weird. The car gets to 90 degrees quite quickly on a cold start but knee it hits 90 ac hot air immediately stops then goes ice cold and then a minute or two kater the temp spike on the coolant gauge goes up to maybe 115 then with easing off the gas and blasting the heater (still cold) goes back to normal at 90.

 

If I pull over and leave it for a minute or two and restart issue has gone. Car drives fine and no issue with loss of heat from the aircon

 

Almost seems like the problem is something isn't working when the coolant hits 90 and gets stuck until the issue resolves or something clears then it's fine for the rest of the day

 

Only happens from a dead cold engine start??

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  • Author
13 hours ago, MarkyG82 said:

Most of the water pump issues are with the 2.0tdi. I don't recall hearing about it on the 1.4. Doesn't mean it's not happened though. 

Another thing to be aware of is you actually had 6 months to take the car back to the supplier for them to have a chance at fixing. Possibly too late now as you have had someone else work on it but worth talking to them.

As for the current issue, take it back to the indy and get them to double check the coolant level. There was one on here over the weekend reporting similar and the garage hadn't done the purge to get rid of the air in the system.

Just looked into what u said above woth the 6months. Apologies I thought u meant warrenty  but its rhe consumer rights act thing.....so thanks that' is an avenue I will explore....

 

 

If anyone has any other thoughts on root cause of the issue would be great to hear 

@dazahill1 you beat me to it. Was busy with kiddo bedtime.

DSG thermostat.

  • Author

Haha only took me a day to figure it out. Really appreciate the piubtrr though. Gives me an avenue to explore

 

First time I have ever bought anything but an old banger....shame its not gone to plan.

 

 

 

 

 

I assume these still have coolant temperature sensors, worth a shot changing that as it’s not normally that expensive, could be throwing a false positive

 

No idea where it’s located though 

hi all - i had my cam belt renewed beginning of the week at 117k  ... my garage buy the full kit ... good Gates belt [which we use on our 1700cc bikes drive here] 

the kit also includes tensioner and water-pump ...i had read here that these 'add on' pumps can be cheap and useless ...considering it's involved in a few hrs of fitting.. 

 

i had the oem skoda pump fitted ...all good ... local driving for a day ...then yesterday set for a 100 mile journey around the m25

and 10 miles out the dreaded coolant red symbol appeared with  an awful warning screaming noise [not to be ignored] ... i pulled over

covered the coolant chamber cap and unscrewed with plastic bag over glove ...looked in and the 'ball' was near empty ... [ok i thought the worst of the fitter] 

anyway asked at the garage if i could fill up my two water flasks [one is the hounds] and they gladly did so ...brought the chamber up to the overflow point 

closed up and drove off ...[thinking i'll sort the anti freeze that should have gone in later] ... note-  i could see the alarms two bare wire arms visibly at empty

 

but only another 10 miles up the road off went the alarm !! ... narrow emergency lane on two lane motorway M2 couldn't hear myself think

let alone the recovery company AA for nationwide ...who i did hear say 3 hrs to wait ! ... so refilled chamber ... it was just 25 mm [one inch] down 

and then limped back to the garage [with one more refill] to be told the water-pump is bad .... ouch

 

next morning a whole new set had been fitted and it was the seal on the water-pump that was leaking fluid ... new pump all good now

 

dodgy seal is very rare but of course does happen 

 

hope this tale helps perhaps

 

tomba

 

Is it losing coolant? What happens if you keep driving will it correct itself? Sounds to me like the thermostat isn't opening properly after being parked overnight. Next time it happens check to see if there's hot water going through the top hose to the radiator. 

  • Author

No not losing coolant (well not after the pump got replaced last month as that was leaking badly)

 

 

 

Thought it could be a stuck thermostat. Yeah if I keep driving the issue does correct itself. Haven't actually managed to pull over when the issue is happening to check that top hose. However after correcting it can feel that hose being hot 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

so ... just a highlight ... i didn't check the coolant tank level for 6 days after have ghe waterpump changed a second time (story here) ... and the level warning light came on again ... freaked me out ... it had dropped to 

where another 500ml went in to level it 

 

it is necessary when anything waterpump related to keep an eye on the level ... just be aware to not open it slowly covered plus a glove on if engine hot ... cools down fast enough to wait ... and being pink means it has added anti freeze in it 

 

 

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