Results 1 to 5 of 5

Flow from Water Pump To Heater

This is a discussion on Flow from Water Pump To Heater within the General Help forums, part of the LSx Technical Help Section category; On the LS1 engine water pump there are two fittings for the heater. One is 5/8" and the other is ...

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

    Flow from Water Pump To Heater

    On the LS1 engine water pump there are two fittings for the heater. One is 5/8" and the other is 3/4". The smaller one is the feed TO the heater, right?
    John

  2. #2
    Member Goldcuffs's Avatar
    Join Date
    Aug 2008
    Location
    Florida
    Posts
    411

    Silver
    2000 Trans Am

    Quote Originally Posted by johngoodman View Post
    On the LS1 engine water pump there are two fittings for the heater. One is 5/8" and the other is 3/4". The smaller one is the feed TO the heater, right?
    John
    They both go to the heater core.

  3. #3
    Junior Member
    Join Date
    Dec 2009
    Location
    Georgia
    Posts
    46
    RV-10

    Quote Originally Posted by Goldcuffs View Post
    They both go to the heater core.
    I guess I didn't phrase it right. I know they both go to the heater, but I need to know which direction the water actually flows. The reason is that my foot will be very close to one of the connections and I will be unable to move it. I want to put an emergency cut-off on the the one that is pumping hotter water into the heater.
    My assumption is that the smaller fitting feeds water and the larger returns it.
    John

  4. #4
    Firebird Encyclopedia 9T8W66's Avatar
    Join Date
    Oct 2006
    Location
    St. Clair Shores. Michigan
    Age
    49
    Posts
    1,605

    Navy Blue Metallic
    `98 Formula M6 HdTp

    If I'm not mistaken the upper hose (at the heatercore) is In the lower hose is Out
    Craig
    Semi Retired Street Racer
    2012 Lava Red Mustang GT Coupe Brembo/3.73's
    Build Date 3/17/11, Last Lava Red GT

    Gone but not forgoten
    NBM `98 Formula M6 HdTp
    1 of 1 Build Date 3/12/98

  5. #5
    Moderator Cutlass's Avatar
    Join Date
    Apr 2008
    Location
    Madison, WI
    Posts
    6,998

    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    I looked at a LS power truck the other day when I replaced a water pump and I think the smaller hose feeds the heater core and the larger is the return.
    Last edited by Cutlass; 12-20-2009 at 05:37 PM.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Water heater hose assembly
    By JayTA98 in forum General Help
    Replies: 23
    Last Post: 07-05-2012, 04:25 PM
  2. Tankless Water Heater
    By 1slowbusa in forum Almost Anything Goes
    Replies: 19
    Last Post: 09-01-2011, 04:50 AM
  3. Water pump help
    By jetaws6 in forum External Engine
    Replies: 4
    Last Post: 08-01-2010, 02:50 PM
  4. Do electric water pumps pump enough water for daily use?
    By xinthenight in forum External Engine
    Replies: 6
    Last Post: 08-02-2007, 10:04 PM
  5. what is the flow rate of stock fuel pump
    By Doc99SS in forum Forced Induction
    Replies: 1
    Last Post: 12-21-2005, 06:06 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
  •