300 TDI head plug size. - Defender Source
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  #1  
Old March 30th, 2011, 02:03 PM
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Santiago Montenegr
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Santiago Montenegro
98 110 CSW 300 TDi
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300 TDI head plug size.

I want to use the hole for the EGR temp sender (plugged in mine) for a VDO temp gauge sender... does anyone know what size would fit?

Thanks in advance,

Santiago
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  #2  
Old April 12th, 2011, 04:14 PM
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Jason Herring
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Where is the stock EGR temp sender - is that the sender in the top of the head? There is some sender there on the 300TDI which is not connected to anything in my conversion.

Normally I see the EGT temp mounted on the EGR block-off plate with a bung welded to it. If indeed you are trying to get EGT, why is this a better spot?
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Old April 12th, 2011, 04:44 PM
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Quote:
Originally Posted by jaherring View Post
Where is the stock EGR temp sender - is that the sender in the top of the head?
Yep, that's it. I want to install a water temp sender there, not EGT.
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  #4  
Old April 12th, 2011, 07:04 PM
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Jason Herring
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So, that sender is in contact with the coolant? Is that what activates the EGR - based on coolant temp? I think I get it :-)

You can always use an adapter to get from that thread size to whatever your temp sender thread is - those are not hard to find online.
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Old April 13th, 2011, 12:28 PM
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Santiago Montenegr
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Santiago Montenegro
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Quote:
Originally Posted by jaherring View Post
So, that sender is in contact with the coolant? Is that what activates the EGR - based on coolant temp? I think I get it :-)
Exactly! And I guess I'll take the adapter route...
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