I was wondering if anyone can offer any advice?
I Have a mk3 golf 2.0 gti engine code 2E. I have been having overheating issues with it.
I have changed:
Water pump
Thermostat
All sensors switches
Expansion cap
Head Gasket
All seals
The problem remains unsolved...
I have recently realised that the problem started not long after the AA changed the coil...
What are the chances that it could be the coil causing the engine to overheat?
Failing that do you have any other suggestions?
Any help much appreciated.
Cheers,
Dubstar_04
Have you considered the condition of the radiator at all?? How old is it?? Could be that the core is knackered (to use the proper technical term)
If it remains ok when idling, ie comes up to temp fan cuts in & then later out again, but overheats as soon as under significant power on a run then it sounds like a blocked rad core - I have also seen the situation where a blocked heater rad core screws up flow within the rest of the system & causes overheating.
I have flushed the complete system and water passes through everything freely. also it overheats so quickly the thermostat doesn't have chance to
open!!
I have tried 3 different thermostats...
How can something so simple be so complicated?
Cool powering the spark wrong? Too hotter plugs? If it over heats that quick could be this.
Does the rad get hot all over or are there cold spots?
quote:
Originally posted by russbost
If it remains ok when idling, ie comes up to temp fan cuts in & then later out again, but overheats as soon as under significant power on a run then it sounds like a blocked rad core - I have also seen the situation where a blocked heater rad core screws up flow within the rest of the system & causes overheating.
quote:
Originally posted by Danozeman
Cool powering the spark wrong? Too hotter plugs? If it over heats that quick could be this.
Does the rad get hot all over or are there cold spots?
Is it overheating though??? Or is the gauge/sender just telling you that it is??
It could be a faulty gauge or sender.
Also check for damaged/chaffed wiring especially around the coil area it could be that the AA man has done some damage
quote:
Originally posted by omega 24 v6
Is it overheating though??? Or is the gauge/sender just telling you that it is??
It could be a faulty gauge or sender.
Also check for damaged/chaffed wiring especially around the coil area it could be that the AA man has done some damage
I had a Sierra once that pressurised the system really badly. Cracked head was the cause.
Steve
quote:
Originally posted by Howlor
I had a Sierra once that pressurised the system really badly. Cracked head was the cause.
Steve
The electrics causing significant heating problems just doesn't stand up. The differences it would cause would be subtle and should be easily
accomodated by the cooling system. Timing used to be a possible cause in days of yore but not with electroinic management.
My bet would be radiator (run the car without a thermostat and see if it still runs hot) or an air lock (some cars have a right involved procedure for
sorting this) or, and you don't want to hear it, a cracked head which causes hot spots and short circuiting. The cracks are usually in the
galleries and only open under pressure i'm afraid. There are rigs for testing this but the cost of a replacement may be less than the set up
costs.
Is it boiling or losing water?
What happened to make Mr AA change coils and things?
[Edited on 6/10/08 by Litemoth]
[Edited on 6/10/08 by Litemoth]
The coil was changed because we went through a puddle and the car cut out, then a few weeks later it just wouldn't start.
I have just been out in it and run it up to temperature and the thermostat just isn't opening. also it sounds like there is air coming from one
of the hoses which won't help.
There is no water loss and it doesn't seem to boil. I ran the car for a few days with no thermostat in and it seemed ok however I was only doing
short runs to work and back.
Prbably a silly question but is the thermostat in the right way round? It sounds very much like an air lock , try bleeding the system by removing the highest sensor or hose while filling . Some VWs have a problem with the water pump impeller coming loose and not pumping . Might be worth getting head gasket tested with a block tester kit and maybe getting the rad flow tested
quote:
Originally posted by rusty nuts
Prbably a silly question but is the thermostat in the right way round? It sounds very much like an air lock , try bleeding the system by removing the highest sensor or hose while filling . Some VWs have a problem with the water pump impeller coming loose and not pumping . Might be worth getting head gasket tested with a block tester kit and maybe getting the rad flow tested
Blocked rad here too. You may still have circulation but unless you take it out and get it tested at a rad specialist you will never know !
Check the thermostat in a pot of boiling water.
Erm how big a puddle did you go through??? any change of water induction and subsequent hydraulicing of the engine??
This could cause a split in the cylinder
After all the fuss I took the car to vw for a electronics check and the report said either a faulty temp sensor or an ecu fault!!
They said they could replace both items for only £900...
my mate breaks vws and sold me an ecu for £20 and a new thermostat from gsf is £8.99
Thats still not solved the problem!!
I have been driving it now for 3 weeks and its not spontaneously burst into flames so i will just keep driving it and hopefully get another 6 months
out of it...
Two common faults :-
1. Temp sensor faulty
2. Fan(s) not working. (VW won't admit they are inherently faulty.)
Fans are expensive from dealers !!
The OBD would show faults on the temp sender and ECU because you've been fiddling with them!! The dealer should have noted the faults and then
cleared them. Then checked for reoccurence.
If you could give us a tedious but accurate timeline of events for the car, starting from when and why the headgasket was changed, when the AA poked
around and when the overheating started, we could perhap, have a better guess?
It will be something elementary. But well hidden!
quote:
Originally posted by dubstar_04
my mate breaks vws and sold me an ecu for £20 and a new thermostat from gsf is £8.99