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Author Topic: Confused.  (Read 3216 times)

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T-rev

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Re: Confused.
« Reply #15 on: 05 June 2011, 11:22:20 »
Thanks Andy worth a try i guess...temp goes to about 95 when driving then drops a few degrees, so am assuming that is when the stat has first opened...burped the top hoses yesterday as long as it seemed necessary so maybe even an airlock somehwere...very annoying now.
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T-rev

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Re: Confused.
« Reply #16 on: 05 June 2011, 14:54:24 »
Def think its a huge blockage somehwere now....Ran the car with cap off on tickover and it keeps bubbling up through the expansion tank....cant clear it.....
Quote
Thanks Andy worth a try i guess...temp goes to about 95 when driving then drops a few degrees, so am assuming that is when the stat has first opened...burped the top hoses yesterday as long as it seemed necessary so maybe even an airlock somehwere...very annoying now.
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Abiton

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Re: Confused.
« Reply #17 on: 05 June 2011, 15:08:20 »
Quote
Def think its a huge blockage somehwere now....Ran the car with cap off on tickover and it keeps bubbling up through the expansion tank....cant clear it.....
Quote
Thanks Andy worth a try i guess...temp goes to about 95 when driving then drops a few degrees, so am assuming that is when the stat has first opened...burped the top hoses yesterday as long as it seemed necessary so maybe even an airlock somehwere...very annoying now.


Was that with it at fully-warmed up temperature?
If so it might be boiling of the coolant, at the sort of temperatures yours is running at.  The system relies to an extent on being pressurised to raise the boiling point.  Cap off and there's no pressurisation.

I'm guessing that you decided against inspecting your water pump?
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T-rev

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Re: Confused.
« Reply #18 on: 05 June 2011, 15:15:28 »
Hi Abiton, yes i did only because it was changed barely 5 months ago...When i did the coolant change the heater for eaxmaple was nice and hot, but today its cold...
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Andy B

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Re: Confused.
« Reply #19 on: 05 June 2011, 15:55:32 »
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.....Ran the car with cap off on tickover and it keeps bubbling up through the expansion tank....cant clear it..... ....

Any car will always boil over at the header tank when running without the cap. It's designed to be a closed pressurised system.  :y
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T-rev

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Re: Confused.
« Reply #20 on: 05 June 2011, 16:22:35 »
HI Andy, o.k thats that part sorted, but i am going to change the thermostat now given only cold air coming from the heater on hot selection, and hope that cures the problem...Waste of good antifreeze yesterday, still live and learn. :)
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Andy B

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Re: Confused.
« Reply #21 on: 05 June 2011, 16:28:12 »
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......Waste of good antifreeze yesterday, still live and learn. :)

drain it into a bowl/bucket & re-use it.  :y :y
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Abiton

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Re: Confused.
« Reply #22 on: 05 June 2011, 16:35:40 »
Isn't the heater matrix 'in circuit' even when the thermostat is fully shut? Not trying to be difficult here, just trying to save you changing bits that don't necessarily explain your symptoms.  :)
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T-rev

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Re: Confused.
« Reply #23 on: 05 June 2011, 16:42:19 »
Not sure mate, but the good news is Daz is in the London/Kent area on Monday & Tuesday of next week..He is coming to me after Kent on Tuesday morning to do something else, so will let the expert take a look. :y
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Andy B

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Re: Confused.
« Reply #24 on: 05 June 2011, 16:53:20 »
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Isn't the heater matrix 'in circuit' even when the thermostat is fully shut?  ....

Yes. The flow through is regulated by the HBV  ;)
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Liam

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Re: Confused.
« Reply #25 on: 06 June 2011, 13:23:29 »
What's the condition of your rad like? I'd take it right out, flush and reverse flush it, shake it, tip it upside down, etc etc until you're sure it's clean. Also check the fins - I've had a rad before that looked fine, but when provoked literally half the fins were so corroded they all crumbled out like dust.
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T-rev

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Re: Confused.
« Reply #26 on: 12 June 2011, 17:13:16 »
Hi All, well it turned out to be the thermostat stuck "CLOSED".....Daz has been round today and changed it, now the car runs as it used to.....No higher than 85 whilst driving,and barely touches 92 at stand still.....A big relief.....Thanks again Daz, brilliant as ever :y :y :y :y
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TheBoy

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Re: Confused.
« Reply #27 on: 12 June 2011, 17:21:39 »
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Hi All, well it turned out to be the thermostat stuck "CLOSED".....Daz has been round today and changed it, now the car runs as it used to.....No higher than 85 whilst driving,and barely touches 92 at stand still.....A big relief.....Thanks again Daz, brilliant as ever :y :y :y :y
Good news :y

Though unusual to see a v6 one stuck closed
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T-rev

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Re: Confused.
« Reply #28 on: 12 June 2011, 17:28:59 »
Yes he did say they normally stick open, but tested it myself out of curiosity with seriously hot boiling water, and it would not open, but as you said, good nerws :) :)
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Darth Loo-knee

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Re: Confused.
« Reply #29 on: 18 June 2011, 16:55:12 »
Quote
Quote
Hi All, well it turned out to be the thermostat stuck "CLOSED".....Daz has been round today and changed it, now the car runs as it used to.....No higher than 85 whilst driving,and barely touches 92 at stand still.....A big relief.....Thanks again Daz, brilliant as ever :y :y :y :y
Good news :y

Though unusual to see a v6 one stuck closed

I have now seen 4 stuck closed.
Glad its sorted now anyway Trev  :y
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