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Author Topic: Prestone Platinum Coolant  (Read 4002 times)

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Doctor Gollum

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Re: Prestone Platinum Coolant
« Reply #30 on: 06 October 2022, 14:14:43 »
Heater Bypass Valve.  ;)

A variable vacuum operated valve that regulates the connection between the cooling system and the heater matrix and controlled by the climate control panel.

It’s made of plastic and mounted to the back of the cylinder head and prone to heat cycle embrittlement, and therefore leaks.

It’s failure is an issue, because at speed, you can potentially lose All the coolant before you notice the coolant level warning and get to the side of the road.
« Last Edit: 06 October 2022, 14:16:46 by Doctor Gollum »
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Steveh

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Re: Prestone Platinum Coolant
« Reply #31 on: 06 October 2022, 15:08:31 »
Oh thanks @Doctor Gollum does the 4 pot have this issue as well ?
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Doctor Gollum

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Re: Prestone Platinum Coolant
« Reply #32 on: 06 October 2022, 15:18:53 »
All facelift cars and I believe any earlier cars with aircon/climate control.  :y
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Migv6 le Frog Fan

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Re: Prestone Platinum Coolant
« Reply #33 on: 06 October 2022, 17:41:47 »
My prefacelift v6 certainly had one. I think it had A/C but couldnt swear to it. Memory is a tad foggy.  :D
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Andy B

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Re: Prestone Platinum Coolant
« Reply #34 on: 06 October 2022, 17:44:21 »
..
« Last Edit: 06 October 2022, 17:48:08 by Andy B »
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