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[hotel21]

As above, please.

Had a very quick rake around looking for the part number but its probably more hurry, less speed as I simply cannot find it.  Anyone assist, so as to ensure I get the GM branded one as opposed to a cheapy pattern?

ta    

B

[TheBoy]

VALVE ASSY., HEATER BY-PASS    90566947

[hotel21]

Thanks, TB.  

Unit price.........£28.25
discounted to .. £21.47
VAT................. £ 3.76
Total payable ...£25.23

Not in stock at local Uncle Arnold Masterfit but will arrive from nearest main branch after 10 a.m. on Monday.  

Guess what I'm stripping out today (if the rain holds off.....)  

[Dazzler]

Reading on here, make sure it has writing/numbers on the top of it. Some people on here have had trouble with ones from Vauxhall not having the writing on it and failing within a few weeks

[hotel21]

Reading on here, make sure it has writing/numbers on the top of it. Some people on here have had trouble with ones from Vauxhall not having the writing on it and failing within a few weeks

Yup, all read and noted, thanks.  Hence the reason for asking for a specifically numbered part, rather than a 'heater bypass valve for a 1998 3.0 ltre MV6'

 

[VX1]

Thanks, TB.  

Unit price.........£28.25
discounted to .. £21.47
VAT................. £ 3.76
Total payable ...£25.23

Not in stock at local Uncle Arnold Masterfit but will arrive from nearest main branch after 10 a.m. on Monday.  

Guess what I'm stripping out today (if the rain holds off.....)  

Sorry to put a downer on things, but if you are collecting it on Monday i think you will have a long wait. Its a BANK HOLIDAY  

[hotel21]

Thanks, TB.  

Unit price.........£28.25
discounted to .. £21.47
VAT................. £ 3.76
Total payable ...£25.23

Not in stock at local Uncle Arnold Masterfit but will arrive from nearest main branch after 10 a.m. on Monday.  

Guess what I'm stripping out today (if the rain holds off.....)  

........ Its a BANK HOLIDAY  

In England, Not Scotland!!!        

[TheBoy]

Thanks, TB.  

Unit price.........£28.25
discounted to .. £21.47
VAT................. £ 3.76
Total payable ...£25.23

Not in stock at local Uncle Arnold Masterfit but will arrive from nearest main branch after 10 a.m. on Monday.  

Guess what I'm stripping out today (if the rain holds off.....)  

Sorry to put a downer on things, but if you are collecting it on Monday i think you will have a long wait. Its a BANK HOLIDAY  

Hotel21 lives above the border, though occasionally manages to scale Hadrians Wall into England

[hotel21]

Job done yesterday and once all topped up, bled, etc then taken for a run, when I discovered an odd thing.

Temp now runs at 92 - 93 instead of previous 95 plus.  Cabin temp settings are still the same (19 and aircon on) and switching to eco or aircon off does not seem to make any difference.  I let it cool overnight and rechecked the level today and alls good.  After doing rear springs and brakes, took it for a punt and temp still quite steady 92 - 93 and when hoofed, slides to 95 then back down again.

Anyone know why??    :-/

[TheBoy]

Job done yesterday and once all topped up, bled, etc then taken for a run, when I discovered an odd thing.

Temp now runs at 92 - 93 instead of previous 95 plus.  Cabin temp settings are still the same (19 and aircon on) and switching to eco or aircon off does not seem to make any difference.  I let it cool overnight and rechecked the level today and alls good.  After doing rear springs and brakes, took it for a punt and temp still quite steady 92 - 93 and when hoofed, slides to 95 then back down again.

Anyone know why??    :-/

Was old one leaking? If so, the pressure (lack of) may raise temp...

[ians]

I think the theory is that air leaks IN through the failing HBV and this results in over pressurisation/over heating.

[TheBoy]

I think the theory is that air leaks IN through the failing HBV and this results in over pressurisation/over heating.

can air leak in until pressure in coolant drops?

[ians]

Well my physics has well and truly deserted me on this but its something like..
at a given temperature the trapped air produces a higher pressure in the system that the liquid coolant - hence the effect of rock hard hoses, and leaking filler cap in extreme cases.   Temp also rises as there is air in the system which reduces the cooling efficiency and so pressure increases still further.

Now in case anyone is tempted please note I am not standing on a pedestal as much as hiding behind it ,   so I'm happy to be corrected!

[TheBoy]

Well my physics has well and truly deserted me on this but its something like..
at a given temperature the trapped air produces a higher pressure in the system that the liquid coolant - hence the effect of rock hard hoses, and leaking filler cap in extreme cases.   Temp also rises as there is air in the system which reduces the cooling efficiency and so pressure increases still further.

Now in case anyone is tempted please note I am not standing on a pedestal as much as hiding behind it ,   so I'm happy to be corrected!

LOL, me too!

I tried getting my head round this a few weeks ago, decided drinking Stella was a much better pastime!

[ians]

I found London Pride helped my understanding a lot - problem is I can't recall what about..