Home > Maintenance & Mods (L322) > Heater woes 2012 4.4 TDV8 |
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Ansi Member Since: 07 Nov 2014 Location: Muenchwilen TG Posts: 143 |
To me, that sounds like air in the system. I don't know the TDV8 but I use a vacuum device on my 5.0SC, without a vacuum it is almost impossible to completely bleed the system. If you hear a gurgling sound, it is very likely that air is still "trapped". |
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12th Jun 2024 6:31am |
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norton Member Since: 16 May 2024 Location: Salisbury Posts: 10 |
Well I bought a vacuum filling and pressure testing kit. Put some coolant flush in,Drained the coolant and vacuum filled it. Still the same… I then pressurised the system and loosened the heater hoses to purge out any remaining trapped air… still the same.
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14th Jun 2024 5:56pm |
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andyrosehome Member Since: 06 Jan 2018 Location: South Wales Posts: 12 |
I had this same issue several years ago on my 2005 4.4 Petrol V8. I discovered that the V8 does not poses particularly good coolant circulation to externals like heater matrix at low revs so they installed an auxiliary heater pump on the left hand bulkhead below the two heater control solenoids, Pretty much directly below the suspension top turret. Not too bad to access if you take both heater controllers out with the pump. I replaced my pump and it's been much better ever since (6 Years or so) although I do still notice a heater boost in winter after an aggressive acceleration but the car heats up fine even at idle. |
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4th Jul 2024 8:03pm |
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