35d worsening gas mileage - solved- thermostat/fan/EGR cooler - DIY with pics

[scorpioy]

I have ordered a new themostat from ebay. It's on its way.
I just have to build a solid plan in my head first for replacing it. That's why I got so many questions

[sgrice]

Here is the link:

RealOEM.com * BMW E70 X5 3.5d pollutant reduction cooling

As I said in my post, I recommend the tight reach wrench (link is here) - it made it much easier to get to some of the bolts on the duct clamps.

Also, you might remember the electrical connector (for EGR temp sensor) that I said I had trouble disconnecting? Good to know I'm not alone. Check out posts #60 and 61 on this link - it's for a 335d, but the much of the info is relevant to our 35d. FWIW, I went back and tried the suggestion in post 61 of pulling the white tab all the way out, but I still couldn't get it to work. For me, using a very small flat blade screwdriver slid under the connector from the back side is still the best way to get it apart.

BTW, if you're replacing the thermostat I assume your temp is also not getting above 72-73 degrees?

Regards.