Results 1 to 7 of 7

Evans Coolant question

This is a discussion on Evans Coolant question within the External Engine forums, part of the LSx Technical Help Section category; I'm thinking about using Evans NPG+ in a new LS1 engine. I'm familiar with all the positive points, but would ...

  1. #1
    Junior Member
    Join Date
    Dec 2009
    Location
    Georgia
    Posts
    46
    RV-10

    Evans Coolant question

    I'm thinking about using Evans NPG+ in a new LS1 engine. I'm familiar with all the positive points, but would like to hear what others think. Also, I would appreciate any tips on how to get all the water out of the system (it's been run once with water). Suggestions on a zero pressure radiator cap would also help - a special cap or just remove the seal on the existing one?
    John

  2. #2
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,576

    Black & Blue
    '02 WS.6 / '07 Suburban

    The engine has two (2) block drains -- the left one is a large brass plug located on the side of the block towards the front and requires a 17mm allen head socket to remove. The right one is quite a bit smaller and is located above the starter, parallel to the ground, and a 5/16" allen head socket fit nice and tight (it is probably a metric fitting).

    Do not know anything about the Evans coolant. Why would you run the system at zero pressure? That will lower your boiling point.

  3. #3
    Moderator Firebirdjones's Avatar
    Join Date
    May 2006
    Location
    Arizona
    Posts
    12,552
    I've seen and read alot about the Evans coolant. Everyone rants and raves about it. Haven't actually had any experience with it though, and don't really plan to.

    I can tell you it's hella expensive though. I'll stick to the regular stuff with routine flushes. Worked for me for 30 years, I see no reason to change now.

    I too am confused at the zero pressure cap, don't remember any mention of that when the Evans coolant was tested.

    Let us know how it turns out for ya.

  4. #4
    Junior Member
    Join Date
    Dec 2009
    Location
    Georgia
    Posts
    46
    RV-10

    Thanks for the tip on the two plugs - I knew about the brass one but the one above the starter I didn't.

    As far as the questions about Evans Coolant, here is what I've read:
    It won't boil until almost 400 degrees, so no pressure is required.
    No pressure means no blown hoses.
    It won't freeze until -40 degrees, and doesn't expand when it does.
    It contains NO water, so vapor, cavitation, and steam don't exist.
    It does contain some glycol, but it is chemically neutralized & not-toxic.
    It's a little more viscous than water so it flows a tad slower.
    This means slightly higher coolant temps but well within operating range.
    It won't corrode, so there is no need to flush it out.
    It is the recommended coolant for all Rotax engines in airplanes.

    One question on the drain plugs - are they torqued? To what?

    John

  5. #5
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,576

    Black & Blue
    '02 WS.6 / '07 Suburban

    Quote Originally Posted by johngoodman View Post
    One question on the drain plugs - are they torqued? To what?

    John

    I would need my service manual to tell you the torque. Quite honestly, I applied a bit of blue thread sealant paste and just tightened them snug on our car.

  6. #6
    Junior Member
    Join Date
    Dec 2009
    Location
    Georgia
    Posts
    46
    RV-10

    Thanks for the tip on the two drain plugs. The large brass one is, indeed, a 17mm. The one behind the starter is 8mm.

    I e-mailed the Evans folks and they got right back to me - They told me not to worry about the pressure cap since the Coolant won't produce any vapor. The only pressure created is by the water pump. So, they said to just use the stock radiator cap. The hoses shouldn't blow because the only pressure in the system is water pump pressure.
    John

  7. #7
    Senior Member
    Join Date
    Jan 2010
    Location
    texas
    Posts
    1,621

    silver
    2000 formula

    wish i could afford it........looks nice

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Help: with coolant question!
    By clg82 in forum Firebird / WS6
    Replies: 21
    Last Post: 08-19-2015, 01:57 PM
  2. LS3 coolant filling question
    By Gobs in forum General Help
    Replies: 6
    Last Post: 01-13-2013, 05:44 PM
  3. Ls6 coolant tubes question
    By km346 in forum External Engine
    Replies: 40
    Last Post: 04-27-2010, 08:23 PM
  4. Evans Aluminum Radiator, Spal fan
    By xssive in forum Parts For Sale / Trade
    Replies: 0
    Last Post: 03-31-2007, 04:39 PM
  5. Coolant question
    By burnout in forum General Help
    Replies: 10
    Last Post: 11-09-2006, 01:54 PM

Bookmarks

Posting Permissions

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