2000 DHS - cooling system problems
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Northstar Engines and System Technical Discussion Discussion, 2000 DHS - cooling system problems in Cadillac Engine Technical Discussion; My cooling system won't release pressure off system and hoses get really big like ready to explode... When I drive ...
  1. #1
    jermaine haynes is offline Cadillac Owners Member
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    2000 DHS - cooling system problems

    My cooling system won't release pressure off system and hoses get really big like ready to explode... When I drive it the next day I have to add water to system before i leave cause the pressure pushed all fluid out... Why

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    vincentm's Avatar
    vincentm is offline Cadillac Owners Connoisseur
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    Stuck thermostat?

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    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: 2000 DHS - cooling system problems

    Stuck pressure cap ???

    BUT ........ what is causing the gross overpressure in the first place. ???

    Either rent one of these from a large auto parts store chain or get it online from www.sjdiscounttools.com/lis75500.html

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2000 DHS - cooling system problems


  6. #5
    jermaine haynes is offline Cadillac Owners Member
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    Quote Originally Posted by vincentm
    Stuck thermostat?
    eBay or dealer?

  7. #6
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2000 DHS - cooling system problems

    Thermostats are pretty reliable and would be my last suspect, but you can pick one up at any parts store.

  8. #7
    jermaine haynes is offline Cadillac Owners Member
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    I checked purge line and I have a steady flow going to grab a new thermostat from dealer or napa

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    Manic Mechanic is offline Cadillac Owners Fanatic
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    Re: 2000 DHS - cooling system problems

    Just make sure which ever one you end up with has jiggle or little ball bearing (BB) check valve on it so that you never have any problems purging air pockets from the system. Most aftermarket low cost thermostats don't have them. I recommend you get an AC Delco part# ACD 131-128 from a dealer or an AC Delco parts house.

    Vernon

  10. #9
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
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    Re: 2000 DHS - cooling system problems

    For reference ..........

  11. #10
    jermaine haynes is offline Cadillac Owners Member
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    Will blue devil work in North Star engine?

  12. #11
    CadillacLuke24's Avatar
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    Re: 2000 DHS - cooling system problems

    Quote Originally Posted by jermaine haynes View Post
    Will blue devil work in North Star engine?
    NO.

    It is a TEMPORARY FIX, and will make the engine a mess for whoever fixes it, if that's the issue. If it doesn't make a mess, it WILL RUIN the engine.

  13. #12
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2000 DHS - cooling system problems

    None of that snake oil (mechanic in a bottle) will work.

  14. #13
    jermaine haynes is offline Cadillac Owners Member
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    I have a crack in my water crossover and shop told me they can't run a pressure test until it get fixed... But once they fixed that they will run the test and find out if the heads are bad and I would waste $400

  15. #14
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2000 DHS - cooling system problems

    Heads are never the problem. Head gaskets are another story.

  16. #15
    jermaine haynes is offline Cadillac Owners Member
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    Quote Originally Posted by Ranger
    None of that snake oil (mechanic in a bottle) will work.
    I'm willing to try anything b4 I buy a motor cuz money is tight right now

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