2003 Head Gasket Repair - Page 5
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Northstar Engines and System Technical Discussion Discussion, 2003 Head Gasket Repair in Cadillac Engine Technical Discussion; It's not an actuator, just a PC fan with a duct. A long extension and 1 bolt. Not a hard ...
  1. #61
    MoistCabbage's Avatar
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    It's not an actuator, just a PC fan with a duct. A long extension and 1 bolt. Not a hard job.

  2. #62
    sts 03's Avatar
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    Oh ok I meant aspirator lol , once out I have to grease the bearing right?

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    Re: 2003 STS coolant leak (possible crossover leak)?

    Technically it is not an aspirator. Those are no longer used. As mentioned, you have a small fan that pulls air in over the cabin temperature sensor. There is no "bearing", just a bushing and you'll probably have no luck "greasing" it, but you can put a few drops of light oil on it and that may quiet it down for a while.

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    Re: 2003 STS coolant leak (possible crossover leak)?

    As in most computer muffin fans, these have a sticky seal over the axle/sleeve bearing. The "oilless" bearing dries out over time and begins to squeal/hummmmmmm.

    Yank off the end of the dash - the flat piece with the window air duct in it m- stick your index finger into the hole and pull. Remove the plastic duct. Straight in, you'll see a small black hex head machine screw. Use a ?? 5mm ?? socket on an extension, loosen the bolt and remove it with mechanic's spring fingers. Snake out the wiring connector and disconnect. Remove the aspirator module and blow it clean with canned computer air. There should be a seal patch over the fan blade center axle. Peel it back and place a drop of synthetic engine oil on the blade axle. Manually spin the blade a few turns. Replace the seal, assemble in reverse order.

    If the module is toast, a new one is about $35 at a Cadillac dealer. Talk to Chris in parts at Rippy Cadillac, over there >>>

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    Thanks , I'll give it a try

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    AHAH! I've been looking for these pictures for a long time. Found them on my old phone. Here's everything removed and/or replaced when I replaced the crossover gaskets:





    If I do it again, I'm removing the water pump drive pulley. I kept getting hung up on it reinstalling the crossover.

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    Nice pics, the fsm says if the egr
    Inlet pipe( which I am assuming is that flex looking pipe connecting to the egr ) if removed that it has to be replaced being that it has an incorporated crush seal .MC, do you remember anything about that?

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    Re: 2003 STS coolant leak (possible crossover leak)?

    Quote Originally Posted by Submariner409 View Post
    As in most computer muffin fans, these have a sticky seal over the axle/sleeve bearing. The "oilless" bearing dries out over time and begins to squeal/hummmmmmm.
    There is an actual bearing in there? If so, I stand corrected, but boy it must be small.

  9. #69
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    The only EGR related thing I replaced was the gasket between the valve and crossover.

    ----------

    No ball bearing in the fan, just a bronze (?) bushing.

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    Re: 2003 STS coolant leak (possible crossover leak)?

    yeah if i pull that little motor i my as well replace it if its only $35 and its loud as hell when its cold out,so thats whats probably causing my heat to only work in max setting?sub i did blew it out with a can of air but i havent tested it yet,probably needs to be changed anyway .

  11. #71
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    Re: 2003 STS coolant leak (possible crossover leak)?

    OK, bronze bushing just as I suspected. Probably sintered bronze. If that's the case you CAN re-oil them.

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    If the fan isn't running, the heat should still work at lower temps, it just won't hold the temp as accurately. If the thermistor is faulty, then yes, that may be your problem. Setting the system at 90 overrides the sensor and puts the system in full hot/high fan (and full cold/high fan when set to 60).

    I've cleaned/oiled mine twice, it's getting noisy again. I'm going to replace it.

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    Re: 2003 STS coolant leak (possible crossover leak)?

    yeah the heat wont work at all unless its in the max setting.

  14. #74
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    In in doing the crossover gaskets now, which cables can I disconnect to make the harness move some?

  15. #75
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    Is this the newer style water pump cover? It has the three square tangs like in subs photos but it has that tab piece where the gasket goes.

    ForumRunnerImage.jpg



    ForumRunnerImage.jpg see how the gasket doesnt fit in the the tab ,would that be an issue and if so should i get the newer cover or get the right gasket with the tab?victor rienz.jpg

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