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35d worsening gas mileage - solved- thermostat/fan/EGR cooler - DIY with pics 35d worsening gas mileage - solved- thermostat/fan/EGR cooler - DIY with pics
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  #121  
Old 01-03-2016, 05:07 PM
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Originally Posted by ZetaTre View Post
Melted piston!!!?!!?! Was that a leaky injector? What makes you link it to a thermostat?

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I can not tell for sure but i think it could be a part of the reason why it happened. The injector of this cylinder was destroyed. No chance to check if it was defective.
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  #122  
Old 01-03-2016, 07:45 PM
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Originally Posted by schurikde View Post
I can not tell for sure but i think it could be a part of the reason why it happened. The injector of this cylinder was destroyed. No chance to check if it was defective.
Help me understand what's the link because I'm not sure I follow.
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  #123  
Old 01-06-2016, 02:09 AM
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Hmmm... I have an '11 35d with about 78k I just bought a couple months ago. So far it's been averaging 17.5mpg with about 85% city driving. I would have thought it be a little higher. But not sure about what temp it's running at, will have to look into that. But does that sound like a reasonable mpg I should expect?
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  #124  
Old 01-06-2016, 01:13 PM
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Picking up the parts to do my water pump, thermostat, AC and auxiliary belt tomorrow. Also grabbing the exhaust back pressure sensor (been getting code 4D03 sporadically on longer drives).

Someone also mentioned doing the cooler thermostat. Anyone know the part number for that one? Thinking of doing the expansion tank as well.
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Last edited by blue dragon; 01-06-2016 at 01:23 PM.
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  #125  
Old 01-06-2016, 01:34 PM
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Originally Posted by asilee View Post
Hmmm... I have an '11 35d with about 78k I just bought a couple months ago. So far it's been averaging 17.5mpg with about 85% city driving. I would have thought it be a little higher. But not sure about what temp it's running at, will have to look into that. But does that sound like a reasonable mpg I should expect?
That seems very low. I have a 2011 35d and i drive mostly city/some hywy and i average 25mpg
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  #126  
Old 01-06-2016, 02:13 PM
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That seems very low. I have a 2011 35d and i drive mostly city/some hywy and i average 25mpg
I'm definitely going to look into this. How many miles on yours?
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  #127  
Old 01-06-2016, 02:14 PM
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I'm definitely going to look into this. How many miles on yours?
110k~
Get OBDfusion app and a CAS bluetooth dongle, you will be able to see temps and do many other diagnostic procedures.
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  #128  
Old 01-06-2016, 02:26 PM
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Originally Posted by blue dragon View Post
Anyone know the part number for that one? .
Transmission oil cooler thermostat for E70 35D part no:17107558267


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  #129  
Old 01-06-2016, 02:34 PM
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Originally Posted by Ozer View Post
110k~
Get OBDfusion app and a CAS bluetooth dongle, you will be able to see temps and do many other diagnostic procedures.
Wow, more than mine. Did you have your thermostat done already?
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  #130  
Old 01-06-2016, 03:45 PM
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looks like a big job to do the thermostat. Anyone know what the labor time should be?
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