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D3 - Engine Bay Everything under the bonnet

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  #11  
Old 25th April 2019, 01:27 PM
madcjd madcjd is offline
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Location: Staining, Lancashire
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That's put a spanner in the works! I wasn't even aware of such an item!
I have oredered the main thermostat from TPS.
How do you differentiate which item is at fault?
I'm still leaning towards the main thermostat as it happened to me half way into a 230 mile journey, after hitting heavy/stationary traffic?
Cheers
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Current:
Graphite grey 2016 q7 3.0 (4m)
Night blue - 2005 D3 4.2 TDi LWB
My pride and joy - 1991 ur 20v quattro (owned since 2003).
BMW 645 (Need to sell now I have 2 A8s....)
Previous cars
A8 D4 4.2tdi lwb (2011)
A4 cab 3.0 Quattro petrol (2005)
T5 Caravelle exec 2.5 (2006)
A8 D2 3.7 quattro sport (2001)
A8 D3 4.2 quattro (2003)
A6 4.2 quattro avant (1999)
A6 2.8 quattro (1998)
Audi Coupe 2.6E (1993)
Carlton 3.0 GSI
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  #12  
Old 28th April 2019, 07:23 PM
madcjd madcjd is offline
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Join Date: Apr 2011
Location: Staining, Lancashire
Posts: 256
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Quote:
Originally Posted by snapdragon View Post
They seem to fail more than the main thermostats but are cheaper and often easier to replace.
Thanks for the info............this has had me looking in the self study documents to see if my 4.2tdi has the same set up? I'm still trying to work out if I have the 09E or 09L g/box? My g/box code is JEF.

Anyhoo...............I made my usual 230 mile drive from Lancashire to Heathrow, having NOT changed the thermostat (for various reasons) and took a gamble but watched the coolant temp gauge like a hawk!
Alas, it sat steady at 90deg all the way.
I don't doubt it will probably repeat the episode of going cool again and if it does, I will change one of two items.

Just thought I'd chuck this in for info.....

I return home on Wednesday and hope the car behaves itself then!
__________________
Current:
Graphite grey 2016 q7 3.0 (4m)
Night blue - 2005 D3 4.2 TDi LWB
My pride and joy - 1991 ur 20v quattro (owned since 2003).
BMW 645 (Need to sell now I have 2 A8s....)
Previous cars
A8 D4 4.2tdi lwb (2011)
A4 cab 3.0 Quattro petrol (2005)
T5 Caravelle exec 2.5 (2006)
A8 D2 3.7 quattro sport (2001)
A8 D3 4.2 quattro (2003)
A6 4.2 quattro avant (1999)
A6 2.8 quattro (1998)
Audi Coupe 2.6E (1993)
Carlton 3.0 GSI
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