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Cadillac Catera and Cimarron Forum Discussion, Catera coolant leak in Past Cadillac Vehicle Discussion; the washers for the banjo bolts can be reused if you aneal them by heating them up a bit and ...
  1. #61
    Steven420 is offline Cadillac Owners Member
    Automobile(s): 97 Catera
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    Re: Catera coolant leak

    the washers for the banjo bolts can be reused if you aneal them by heating them up a bit and then reinstalling them. this rearranges the molecules and makes the washer soft again..ive done this hundreds of times without leaks.

  2. #62
    R-Caddy's Avatar
    R-Caddy is offline Cadillac Owners Enthusiast
    Automobile(s): 2 1997 Cateras: black&ocean green
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    Re: Catera coolant leak

    I removed the HCV today. It seems ok, but my Cat started pouring coolant yesterday. Is it still possible that it's the HCV's fault? Where could it be leaking from? I need to get this car back on the road. Also, is it OK to just get a T-connector to connect the hoses, instead of using the alve again? Or could it be some other reason for it?
    Thanks

  3. #63
    mytmous is offline Cadillac Owners Member
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    Re: Catera coolant leak

    The 3 lines are for 2 paths, It took me awhile to find how it worked and flowed.
    the valve is vacume controled to let it flow from the right(feed line) to one of the 2 other lines.
    top left (into heater) or bottom left (into bypass feed)

    Only way i can explaine it, top left goes into heater then out to radiator, the bottom left goes into the flow after the heater but going to the same place. SO if a vacume is applied you have hot water in the heater core, no vacume no heat as the flow is bypassing the heater core.
    I was without heat for a year or so because the vacume line from inside the car to the HCV didn't work, I T-'ed off a line from the intake and ran to the HCV so i could have heat. and after replacing the HCv 3 times in 2 years, i got sick of paying $90 a pop for it.

  4. #64
    sccatera97 is offline Cadillac Owners Fanatic
    Automobile(s): 1997 Cadillac Catera 2002 SEville STS
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    Re: Catera coolant leak

    There is also a cross over manifold between the two cylinder heads that has two sensors in it. It could be leaking fronm the threads of the sensors or the o-rings between the manifold and cylinder heads.

  5. #65
    xanax06's Avatar
    xanax06 is offline Cadillac Owners Fanatic
    Automobile(s): 1997 Catera
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    Re: Catera coolant leak

    I took my Cat to dealer for what I thought was going to be a HCV replacement. Small leak, could smell coolant. They call me after 2 hrs, seems that some "bridge" is leaking and is going to cost $800 to fix. But thankfully I can afford it.
    I found $25K hidden in the trunk.

  6. #66
    Boris is offline Cadillac Owners Fanatic
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    Re: Catera coolant leak

    $800 for the coolant cross over ??

    Where do they get these prices ????

  7. #67
    livebait is offline Cadillac Owners Member
    Automobile(s): Cadillac
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    Re: Catera coolant leak

    When checking into a leak that is located on the driver side on the Catera there is usually a few things to look for.
    Is the leak dripping from the manifold? If it is, then it will probably end up being the Head Gasket.
    But before assuming the worst check out the obvious first.
    Look for a leak in the HCV, Coolant Return Pipe, Oil Cooler Cover, Water Crossover or even the thermostat.
    I just completed a complete head job on my Catera and it was the head gasket that caused the mystery leak coming from the Driver Manifold.
    One thing that should be noted, The factory engine coolant is the red type and that type is highly corrosive. When changing over the head gasket or doing a complete Flush then change to the Green coolant. I can show the damage on my head gaskets that where eaten away because of the coolant. The head was not damaged but you could clearly see where the coolant ate into the gasket and eventually worked its way out into a leak.
    I will post some picture if you would like just email me
    bait@livebaitandtackle.com
    Thanks Keith
    www.livebaitandtackle.com

  8. #68
    Army_MP_From_MO's Avatar
    Army_MP_From_MO is offline Cadillac Owners Fanatic
    Automobile(s): 1999 Cadillac
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    Re: Catera coolant leak

    I'd have to pull out the owner's manual, but I think the red type is the only type that should be used in our cars. I don't know the reason why, but I would assume the engineers know why.

  9. #69
    Cadi Cat is offline Cadillac Owners Fanatic
    Automobile(s): 2000 Catera
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    Re: Catera coolant leak

    I have 142k miles and counting, and I've never had a problem with leaks in the heads or anywhere else besides my water pump. But I don't think that's because of the "corrosive" factory coolant. It specificly says use dexcool only!

  10. #70
    Jon_AC is offline Cadillac Owners Member
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    Re: Catera coolant leak - Why Me lol

    So, My poor baby went into the dealership today with a nasty coolant leak.
    I brought it into a few other places, but none of them wanted to work on the car because they didn't have the proper tools. So I guess I'm stuck bringing it to the dealership.

    1998 Catera with 145,000km.

    Prior to this, I've had no major problems, but have only had the car for about 2 years.

    I did a run on the vin # and I found that it was diagnosed with a minor coolant leak just before I got the car. In the report I received, it mentioned the leak coming from one of the heads or the oil cooler.

    I'm the lucky one who got stuck with it when the coolant leak got really bad.

    I do notice that its leaking from the back of the engine though.
    So I'm kind of hoping its the HCV.

    Can anyone suggest a reasonable price that it should cost to get this repaired.
    I will post the quote I get from the dealership as soon as it is available.

    -Jon

  11. #71
    Jon_AC is offline Cadillac Owners Member
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    Re: Catera coolant leak - Why Me lol

    Just got the update from the dealership, $200 parts and labor to replace the HCV.

    But I am now leaking oil into the spark plugs and have to get the Valve cover gasket replaced. And they quoted me $770 parts and labor for that.

  12. #72
    green4life is offline Cadillac Owners Member
    Automobile(s): Catera
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    Re: Catera coolant leak

    I wonder how this turned out...

  13. #73
    albentley is offline Cadillac Owners Member
    Automobile(s): Catera
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    Re: Catera coolant leak

    OK newbie here. I have coolant coming from what appars to be a drain tube above the transmission. No water in the cabin of the vehicle. Any help would be great! 2000 Cat with 102k miles

  14. #74
    Lewis Rolen is offline Cadillac Owners Member
    Automobile(s): catera
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    Re: Catera coolant leak

    I have water pouring out as quick as I can pour it in, I did replace the oil cooler and all was fine for a week or two, I've been under the car and put my hand behind both sides, can't see where it's leaking!

  15. #75
    carachase is offline Cadillac Owners Member
    Automobile(s): 1999 Cadillac Catera
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    Thumbs up Re: Catera coolant leak

    Quote Originally Posted by ewill3rd View Post
    On the top of the engine, in what would usually be a "valley" they installed a metal plate. This plate has sealer around the edges and bolts to the engine block but in it is mounted the oil cooler. Below the plate is coolant flowing through the engine to remove heat from the engine oil. Why they mounted this thing under the intake I'll never know, but needless to say if you have a pretty good coolant leak from this area it's likely this plate leaking.
    exactly what was wrong with ours!! lol, but we thought freeze plugs were the culprit, so took the entire engine out!

    does anyone happen to have the part # for this gasket? none of the retail parts stores seem to have it, or we didn't give them the correct name for it...whichever...

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