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

[Tuesday]

Lead foot in town is'nt grounds to cry about 20 mpg! It's a 26-28 highway with your foot not in it kind of car. I bought ,umm,a gauge guard.Instant temp readings among other features.

[daytonatrbo]

Before replacing the Tstat, ours was barely managing 18.5mpg. After replacing it, it consistently gets around 25 with mixed driving and 27 on trips.

[Socale39]

My EGR before and after with 75k on the clock:

[daytonatrbo]

Originally Posted by Socale39

My EGR before and after with 75k on the clock:

Nice and clean! Did you just use solvents and a brush, or did you use ultrasonics?


I'd like to get my intake mani that clean, but I'm afraid solvents might attack the plastic.

[Socale39]

Acetone. Cuts through carbon more than any other solvent I tried. I also used it for my intake manifold as well.

[Jnash467]

Originally Posted by Socale39

Acetone. Cuts through carbon more than any other solvent I tried. I also used it for my intake manifold as well.

What kind of Acetone did you use? and did you soak the EGR in it? Thank you.

[ard]

Originally Posted by Jnash467

What kind of Acetone did you use? and did you soak the EGR in it? Thank you.

That's like asking 'what kind of oxygen do you breathe' ...

[the_ulf]

Originally Posted by ard

That's like asking 'what kind of oxygen do you breathe' ...

[Socale39]

Well I used the ole Carly app today to get an idea about my temps. Outside temp was about 89 degrees with about 45% humidity. Traveled on the highway for a few miles at a steady 70mph with the AC on and it topped at just a hair under 77. Around town it would vary between 75-78 on and off load. Sounds like my numbers are low so I'll likely be ordering up the parts. I figure I might as well order up the thermostat, pump, idler, hoses and belts since I'll be in there.

[Dieseldonkey]

Originally Posted by Socale39

Well I used the ole Carly app today to get an idea about my temps. Outside temp was about 89 degrees with about 45% humidity. Traveled on the highway for a few miles at a steady 70mph with the AC on and it topped at just a hair under 77. Around town it would vary between 75-78 on and off load. Sounds like my numbers are low so I'll likely be ordering up the parts. I figure I might as well order up the thermostat, pump, idler, hoses and belts since I'll be in there.

I got my Indy to do the water pump as well. Cost no more extra labor.