Coolant temp too low with a 170 t-stat?

Coolant temp too low with a 170 t-stat?

This is a discussion on Coolant temp too low with a 170 t-stat? within the F150 Ecoboost Problems forums, part of the F150 Ecoboost Forum category; I bought a Reische 170° t-stat for my truck and was wondering if anyone else has seen their temp gauge drop when coasting without applying ...

Page 1 of 4 123 ... LastLast
Results 1 to 10 of 34
Like Tree8Likes

Thread: Coolant temp too low with a 170 t-stat?

  1. #1
    Ecoboost Sr Member cdat81986's Avatar

    Join Date
    Jun 2014
    Location
    stafford va
    Posts
    70
    Member #
    5432
    Liked
    11 times

    Coolant temp too low with a 170 t-stat?

    I bought a Reische 170° t-stat for my truck and was wondering if anyone else has seen their temp gauge drop when coasting without applying any throttle? Even with 90°+ days and the ac blasting at cruising speed if I take my foot off the throttle and just coast after about 10 seconds or so the needle will start to drop off of the normal range about a quarter inch. When you go back into the throttle it will come up back to where it normally is supposed to be.

    I had had my tune updated for the for the new temps, install went fine, no problem bleeding the cooling system.

    I wanted to make sure I didn't have a funky sensor or gauge so I data logged it the entire way to work, all highway 55-85 mph and when I would take my foot off the gas the temps would drop into the mid to low 160s and when I gassed it again it would go back up to about 180 or so. So seeing that it confirms what I was seeing on the gauge.

    I called Reische this morning and spoke to the guy for a few minutes and he said while it's cause for concern, it's not a big deal unless I get a P0128 code. He said the t-stat might be getting hung up opening and closing and if I got the code he would replace it. He also told me that he's getting ready to release a new t-stat for the ecoboost that is better made and built exactly like the oem.

    I'm a bit concerned about this, especially if the temps drop like that in the summer, what's it going to do when it's below freezing out?

    Sorry for the long winded post just wanted to explain it clearly. Has anyone else seen anything like this?

  2. #2
    Eco-Beast Sirikenewtron's Avatar

    Join Date
    Oct 2014
    Posts
    2,950
    Member #
    6649
    Liked
    1014 times
    Well I'd tell him to send that new style thermostat on over when it's ready, free of charge.
    Those temps seem too low.
    Mike Wood likes this.
    2013 XLT S. Crew cab 4x4

    Bilstein leveling coil overs top setting
    3" rear blocks
    34/10.5/17 BFG KO2's
    Husky floor liners
    Raptor Grill lights



  3. #3
    Ecoboost Veteran cecoboost's Avatar

    Join Date
    Feb 2016
    Location
    United States
    Posts
    279
    Member #
    14905
    Liked
    69 times
    go back to the tune for the stock thermostat. The fan is probably set to come on sooner now. That should help for now but if the thermostat is faulty it won't be a long term fix

  4. Remove Advertisements
    F150EcoBoost.net
    Advertisements
     

  5. #4
    Ecoboost Sr Member cdat81986's Avatar

    Join Date
    Jun 2014
    Location
    stafford va
    Posts
    70
    Member #
    5432
    Liked
    11 times
    I agree that they are too low. I'd really like to swap it out for another one, preferably one of the upgraded ones. I can't force the guy to give me one for free but I don't think I should have to pay for another
    mwemaxxowner and cecoboost like this.

  6. #5
    Eco-Beast mwemaxxowner's Avatar

    Join Date
    Mar 2016
    Posts
    4,539
    Member #
    15410
    Liked
    1381 times
    You tried being nice. This is a high dollar truck being threatened by a low dollar part. It won't kill him to send you another.

    I'd try asking nicely once more. If you aren't satisfied, threaten to oust him on the internet. That can carry a lot of weight these days. One unhappy customer can make waves.

    Just look at Elkhart. Haha

  7. #6
    Ecoboost Sr Member cdat81986's Avatar

    Join Date
    Jun 2014
    Location
    stafford va
    Posts
    70
    Member #
    5432
    Liked
    11 times
    That's true. The guy was nice, I suppose that I could always just tell him that I got the p0128 code if I had to. I definitely want the newer updated style one though.

    So these temperatures are definitely not normal, correct?
    Last edited by cdat81986; 08-24-2016 at 07:43 PM.

  8. #7
    Ecoboost Pro slothman's Avatar

    Join Date
    Jan 2016
    Location
    CA
    Posts
    839
    Member #
    14592
    Liked
    219 times
    this motor isn't designed for a 170 Tstat.

    Moral of the story: use the stock Tstat

    If you want it to run cooler, run 70% distilled water during the summer
    Mike Wood likes this.
    My catch can 'how to': http://www.f150ecoboost.net/forum/42...catch-can.html

    '15 Screw 3.5 EB - Unleashed E30 tune - SCT LivewireTS - MBRP 4" catback - VTA - tint - RX catch can
    98 Viper GTS
    07 GT500- sold

    I've always been asked, 'what is my favorite car?' and I've always said 'The next one'. - Carroll Shelby

  9. #8
    Ecoboost Veteran cecoboost's Avatar

    Join Date
    Feb 2016
    Location
    United States
    Posts
    279
    Member #
    14905
    Liked
    69 times
    Go to vendors list and buy a rat stat and be done with it
    Brute840 likes this.

  10. #9
    Eco-Beast milesej05's Avatar

    Join Date
    Jan 2014
    Location
    Omaha, Nebraska
    Posts
    5,101
    Member #
    3552
    Liked
    1900 times
    Quote Originally Posted by slothman View Post
    this motor isn't designed for a 170 Tstat.

    Moral of the story: use the stock Tstat

    If you want it to run cooler, run 70% distilled water during the summer
    Really? My truck performs perfect with the 170° thermostat...with all my tunes. I also don't see any coolant temps over 200° even when it is over 100° ambient.
    greg hazlett likes this.
    2013 Oxford White EcoBoost FX4 with a few goodies

  11. #10
    Eco-Beast mwemaxxowner's Avatar

    Join Date
    Mar 2016
    Posts
    4,539
    Member #
    15410
    Liked
    1381 times
    Quote Originally Posted by milesej05 View Post
    Really? My truck performs perfect with the 170° thermostat...with all my tunes. I also don't see any coolant temps over 200° even when it is over 100° ambient.
    Man. I really need to get mine installed. Had it in the box for a while now. My coolant runs about 205. Spikes to 210 or so.

Page 1 of 4 123 ... LastLast

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. 170* Stat ?????
    By MudnRox in forum F150 Ecoboost Performance
    Replies: 35
    Last Post: 08-04-2016, 11:29 AM
  2. Custom Low Temp Thermostat
    By Daltonkk in forum F150 Ecoboost Performance
    Replies: 0
    Last Post: 01-07-2016, 09:18 PM
  3. 170 Degree T-Stat
    By Daltonkk in forum Wanted
    Replies: 1
    Last Post: 01-05-2016, 10:33 PM
  4. 170 T-stat
    By Rutt3.5 in forum F150 Ecoboost Performance
    Replies: 18
    Last Post: 09-14-2015, 11:34 AM
  5. Torque Convertor Lockup Speed vs. Trans Temp vs. Coolant Temp
    By Mike Wood in forum F150 Ecoboost Chat
    Replies: 21
    Last Post: 11-13-2014, 07:10 AM
Connect with us: F150 Ecoboost Forum on Twitter F150 Ecoboost Forum on Facebook F150 Ecoboost Forum RSS Feed
Find us on Google+