High Temperature on gauge
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My temperature gauge is reading very high.
I had an issue last week when I ran out of coolant on my way to the garage for other issues. The red light came on briefly, which is strange as there isn't a sensor in the expansion tank…
The water pump and thermostat has been replaced and there was a leak at the heater control valve, which was seized (no warm air in cabin). This has been resolved and there are no leaks. there was no pressure in expansion tank so the cap was replaced.
The fan kicks in and it doesn't appear to be losing any coolant yet the gauge still reads high.
Any clues please?
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Or the head gasket or head is warped from over heating….Are you lossing any more water/antifreeze?
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
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Local Hero
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Are all the water pipes getting hot?
1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.
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It doesn't seem to be losing any more water. Water is pumping into the expansion tank and all the pipes are hot. There is hot air blowing into the cabin so there is no air lock by the looks of it. It has also had a new rad fitted recently as well as us fitting new water pump and thermostat.
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It still reads about 3/4 of the way across.
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I'm hoping to change the expansion tank and coolant level sensor on Saturday to see if this makes any difference (if the parts arrive on time anyway)
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MOTY 2013
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http://www.vwgolfmk2.co.uk/viewtopic.php?f=37&t=14913
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MOTY 2013
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Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
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VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
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Hoping to replace the coolant temp sensor today.
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MOTY 2013
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brown
red/blue
red/yellow (blue/yellow on some)
black or black/yellow
the coolant level sender is a 2 pin plug with rubber boot, brown and red/blue, looks the same as brake fluid warning switch plug
Hello my name is John and I'm a dub addict.
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There certainly isn't a relay 42/43, not sure if there is a holder there. I will check later.
Is it looking like Head gasket or faulty gauge?,………..
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I left the engine to run for 30 mins with the expansion cap off to ensure that any air is expelled but after only five to tens mins the fan had alredy kicked in with the temp gauge sitting on 3/4 plus.
Water is flowing through the system back into the expansion tank as this can be seen clearly when the cap is off, also if you squeeze the pipes the water flow 'squirts' the top and bottom pipes are also warm to the touch.
For a bit of history, I've also changed, thermostat, radiator, head gasket.
Any ideas as to why I'm constantly running hot ?
I'm worried this will cause major issues if not sorted !!
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MOTY 2013
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the rule of thumb when bleeding coolant is as soon as you see the level start to rise or coolant bubble, then switch the engien off and refit the cap. the problem is the coolant will boil before operating temp is reached which will then give you a load more airlocks and you'll have to start again. when the cap is on the system can pressurise, which raises the boiling point.
if the coolant did start to boil this may explain the odd fan running/temp?
it may be the timing is out though, this can cause the engien to run hotter than usual, or perhaps some of the radiator cores are blocked so its not cooling the system very well. if next time you try it the fan kicks in, feel all the way across the radiator. the whole thing should be hot to touch before the fan can kick in. if its mostly cold then that would tell you there is a blockage. have a feel around the rad fan switch as well, this area should be too hot to touch before the fan can kick in
Last edit: by rubjonny
Hello my name is John and I'm a dub addict.
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You should take it for a drive and the gauge should drop quite quickly from the cooling air of moving - if it does not then you have an issue.
What is your oil temperature saying ?
Mk 83 GTI did not have the level sensor, the wires were there but the relay was not.
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MOTY 2013
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frankly im surprised it didnt boil up and spout coolant all over the place if you left it for half an hour without the cap on it, so you're doing well
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Hello my name is John and I'm a dub addict.
My wiring diagrams and other documents have moved here:
VAG Documents & Downloads
You'll need to sign into google/gmail for the link to work! (its free!)
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