New HGF and still overheating
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Not many rules really, this board being aimed at technical issues, it shouldn't fall foul (hopefully) of some of the more personal issues that can affect forums.
Rule 1 - Is that you need to think very carefully before posting anything technical or asking anything technical relating to the security system of the car - See 'Security Issues' sticky for more info.
Rule 2 - We (MGF Register) do not support copyright infringement and therefore references to CD ROM, PDF versions or paper copies of the workshop manual (for instance) should not be posted on the forum. We don't want to get into trouble and we'd rather sell you a genuine hard copy through our Regalia shop anyway!
Because advice is honestly and freely given in this technical section, much of it will be amateur experienced based, so any information is given in good faith and is not guaranteed as correct.
New HGF and still overheating
Hi I am a damsel in distress. My lovely MGF VVC Yreg, whom I love driving recently had the head gasket go some weeks ago. Last done 10yrs ago.
Had it replaced, pressure tested, new thermostat etc.,
Sadly two weeks later it overheated, a O ring seemed the culprit BUT two weeks later it overheated again. Always after been in queues of traffic. Oil was always clear. However last time all water disappeared from header tank.
Amended thermostat, but garage and I know we havent resolved source of problem as currently putting in 1 litre water every 6-7 days, to keep it topped-up. Temp guage stays bottom of guage until at traffic lights when it sdtarts to climb to two points below halfway.
So clearly problem not gone away.
Any thoughts, all welcome.
Christine
Had it replaced, pressure tested, new thermostat etc.,
Sadly two weeks later it overheated, a O ring seemed the culprit BUT two weeks later it overheated again. Always after been in queues of traffic. Oil was always clear. However last time all water disappeared from header tank.
Amended thermostat, but garage and I know we havent resolved source of problem as currently putting in 1 litre water every 6-7 days, to keep it topped-up. Temp guage stays bottom of guage until at traffic lights when it sdtarts to climb to two points below halfway.
So clearly problem not gone away.
Any thoughts, all welcome.
Christine
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Re: New HGF and still overheating
Hi,have you changed the inlet manifold gasket ? if not that may well be the problem,we do quite a few ,Davek Racing Red
- Tipper
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Re: New HGF and still overheating
Try the following:-
1 New expansion tank cap
2 Check radiator cooling fan works
3 Make sure the garage are bleeding the cooling system via all 3 bleed points, three times...bleed all three, bleed all three and bleed all three again!
Good luck!
1 New expansion tank cap
2 Check radiator cooling fan works
3 Make sure the garage are bleeding the cooling system via all 3 bleed points, three times...bleed all three, bleed all three and bleed all three again!
Good luck!
- 3 DUCKS
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Re: New HGF and still overheating
does your heater blow hot air ? if not it could be the above quoted comment.Tipper wrote:Try the following:-
.
3 Make sure the garage are bleeding the cooling system via all 3 bleed points, three times...bleed all three, bleed all three and bleed all three again!
Good luck!
3D.
TF 160
- hawkstringer
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Re: New HGF and still overheating
I had an issue where the fan would not come on. Was not the stat, I took it to an auto-electrician who traced the fault to a relay. (£35 quid)
As well as this I have flushed my coolant twice in the past 4 years, and refilled 50/50, coolant first. Let the engine up to temp and left the expansion cap off til i was happy that all the air was out. Took it for a spin for 5 mins then topped up coolant as required. All been fine. never actually bled any points, maybe I have been lucky. also put the blowers on full heat to open up matrix etc.. make sure gets hot. I may also question the headgasket re-fit in your case. I have heard that know once they have gone on the VVC they do like to make a habit of it. The head can be reworked and supersteel headgasket fitted ££££££££
New to forum hi all!!!
As well as this I have flushed my coolant twice in the past 4 years, and refilled 50/50, coolant first. Let the engine up to temp and left the expansion cap off til i was happy that all the air was out. Took it for a spin for 5 mins then topped up coolant as required. All been fine. never actually bled any points, maybe I have been lucky. also put the blowers on full heat to open up matrix etc.. make sure gets hot. I may also question the headgasket re-fit in your case. I have heard that know once they have gone on the VVC they do like to make a habit of it. The head can be reworked and supersteel headgasket fitted ££££££££
New to forum hi all!!!
- Keith Williams
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Re: New HGF and still overheating
If you are adding more coolant and flushing it into the system you may get away without a bleed but I think you have been more than lucky if you have never bled your car after a coolant change. Incorrect bleeding is more than likely to create an over heat of the engine which could lead to potential HGF or engine failure. There will be very few people who would not recommend a full bleed after the coolant is changed or if the cars is topped up after a major loss of coolant. It is recommended in the workshop manuals.hawkstringer wrote:As well as this I have flushed my coolant twice in the past 4 years, and refilled 50/50, coolant first. Let the engine up to temp and left the expansion cap off til i was happy that all the air was out. Took it for a spin for 5 mins then topped up coolant as required. All been fine. never actually bled any points, maybe I have been lucky. I may also question the headgasket re-fit in your case. I have heard that know once they have gone on the VVC they do like to make a habit of it. The head can be reworked and supersteel headgasket fitted ££££££££
There have been instances of poor quality gaskets been fitted due to manufacturing faults in them but I have never heard that VVCs have a habit of failing once they have gone once.
1998 MGF VVC, 2001 Trophy 160 & 2013 MG6 GT TSE
- hawkstringer
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Re: New HGF and still overheating
Sorry, what I meant is a few people from another members club, had the headgasket on the vvc keep failing 3 times in a year for one chap. But they were overworking it before getting it up to temp. Also think they were a bit heavy footed. :0)
- Mike H
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Re: New HGF and still overheating
It's difficult to comment without knowing what 1 litre of water every 6/7 days means in terms of mileage etc, but a couple of years ago it took six weeks, yes, six weeks, to fully bleed the coolant system on the TF after HGF, as reported in this thread here.
It is critical that the bleed procedure is carried out to the letter, and even then, as in my case, and with an experienced, rated Dealer, it is not foolproof
On the assumption there are no obvious leaks, then it *may* just be a case of ensuring that it is bled, re-bled and bled again, then run, and the procedure repeated etc etc as mentioned above, until it is sorted.
It does sound as if you need some professional experience to help get to the bottom of this.....
It is critical that the bleed procedure is carried out to the letter, and even then, as in my case, and with an experienced, rated Dealer, it is not foolproof
On the assumption there are no obvious leaks, then it *may* just be a case of ensuring that it is bled, re-bled and bled again, then run, and the procedure repeated etc etc as mentioned above, until it is sorted.
It does sound as if you need some professional experience to help get to the bottom of this.....
Audi TTS owner
Former MGTF 135 owner
Former TF 160 Sprint owner
Former ZS180 owner
Former MGF owner
Former MGTF 135 owner
Former TF 160 Sprint owner
Former ZS180 owner
Former MGF owner
- Mike H
- Posts: 680
- Joined: Tue Oct 09, 2007 6:41 pm
- MGF Register Region: Cotswolds
- Model of Car: 2010 MGTF135
- Location: Cotswolds/Torbay
Re: New HGF and still overheating
It's difficult to comment without knowing what 1 litre of water every 6/7 days means in terms of mileage etc, but a couple of years ago it took six weeks, yes, six weeks, to fully bleed the coolant system on the TF after HGF, as reported in this thread here.
It is critical that the bleed procedure is carried out to the letter, and even then, as in my case, and with an experienced, rated Dealer, it is not foolproof
On the assumption there are no obvious leaks, then it *may* just be a case of ensuring that it is bled, re-bled and bled again, then run, and the procedure repeated etc etc as mentioned above, until it is sorted.
It does sound as if you need some professional experience though to help get to the bottom of this.....
It is critical that the bleed procedure is carried out to the letter, and even then, as in my case, and with an experienced, rated Dealer, it is not foolproof
On the assumption there are no obvious leaks, then it *may* just be a case of ensuring that it is bled, re-bled and bled again, then run, and the procedure repeated etc etc as mentioned above, until it is sorted.
It does sound as if you need some professional experience though to help get to the bottom of this.....
Audi TTS owner
Former MGTF 135 owner
Former TF 160 Sprint owner
Former ZS180 owner
Former MGF owner
Former MGTF 135 owner
Former TF 160 Sprint owner
Former ZS180 owner
Former MGF owner