Results 1 to 7 of 7

Thread: Radiator flush

  1. #1
    Aspen and Volare Junior Member
    Join Date
    Oct 2018
    Location
    Mass
    Country:
    United States
    Posts
    8
    Thanks
    5
    Thanked 0 Times in 0 Posts

    Radiator flush

    I checked my coolant and it wasnít measuring to needed temps and looked dirty. I drained the system and the overflow. I added the cleaner and started adding water but only about 1 1/2 gallons went into and no more would go in. I ran the car thinking that would draw it through but it hasnít. Any ideas on what iím doing wrong?

  2. #2
    Aspen and Volare Super Member 77rr2x4s's Avatar
    Join Date
    Oct 2015
    Country:
    United States
    Posts
    1,196
    Thanks
    7
    Thanked 78 Times in 71 Posts
    the t stat needs to reach temp and open for the water to flow if that`s what your asking

  3. #3
    Aspen and Volare Junior Member
    Join Date
    Oct 2018
    Location
    Mass
    Country:
    United States
    Posts
    8
    Thanks
    5
    Thanked 0 Times in 0 Posts
    Ok, I must not have had the car running long enough. When I do and it reaches temperature, the water level will lower?

  4. #4
    Aspen and Volare Super Moderator aspen79's Avatar
    Join Date
    Oct 2015
    Location
    Rib Mountain (Wausau) WI
    Country:
    United States
    Posts
    1,720
    Thanks
    2
    Thanked 183 Times in 144 Posts
    Yes. It should "burp" to use a technical term, when the thermostat opens. Run the engine at 1,500-2,000 rpm to shorten the time it takes. Be careful to not stand over the radiator, sometimes when the system burps, it burps out the filler.

    Before the thermostat opens there's basically an air lock. If the air can't get out, the liquid can't go in.

    When you say you drained the system, do you mean from the radiator drain only or also from the block drain plugs (or one plug if it's a S6). If you didn't drain the block, 1 1/2 gallons is about all it takes to fill it back up. The block holds quite a bit of coolant that won't drain from the radiator petcock. I'd guesstimate roughly half the capacity is in the block. It can only drain through the radiator as low as the passages to the water pump are in the block.

    Depending on engine and radiator size, capacities range from about 12 qts up to 16 qts.
    1979 Aspen Sunrise 500". Bought in 1987 with 72,000 miles and a mighty E24 California emission 90hp leaning tower of power/4-speed
    1996 Dakota with a torque monster (not) 3.9L V-6 and automatic owned since 1998. Now demoted to winter duty
    2008 Ford Mustang V6, the new summer daily driver

  5. #5
    Aspen and Volare Super Member doublechaz's Avatar
    Join Date
    Oct 2015
    Location
    AZ
    Country:
    United States
    Posts
    611
    Thanks
    14
    Thanked 73 Times in 65 Posts
    Also, with the V8s at least it helps to have the car pointing uphill or with the front wheels on ramps to help burp the system. Not necessary, but it helps.

  6. #6
    Aspen and Volare Super Member 77rr2x4s's Avatar
    Join Date
    Oct 2015
    Country:
    United States
    Posts
    1,196
    Thanks
    7
    Thanked 78 Times in 71 Posts
    Once flowing and filled, check again after it cools down and top off again as it may lower once the air works its way out.

  7. #7
    Aspen and Volare Junior Member
    Join Date
    Oct 2018
    Location
    Mass
    Country:
    United States
    Posts
    8
    Thanks
    5
    Thanked 0 Times in 0 Posts
    Thanks for the replies. I drained it via the petcock, emptied the coolant overflow. Where are the location of the block plugs?

Posting Permissions

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