changed HCV and that wasn't the problem.
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Cadillac Catera and Cimarron Forum Discussion, changed HCV and that wasn't the problem. in Past Cadillac Vehicle Discussion; I thought I had the coolant leak solve when I changed the HCV and it stoped for a couple day, ...
  1. #1
    cateraowner is offline Cadillac Owners Fanatic
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    changed HCV and that wasn't the problem.

    I thought I had the coolant leak solve when I changed the HCV and it stoped for a couple day, and now it's leaking the same as before.

    I'm not sure what's back therem but the leak is hard to locate.

    it's at the back of the engine, closer to the driver side, above the exhuast manifold. from the top, you can't see the leak at all, but under neath you see it leaking onto the bell housing.

    I have no idea what's back ther, nor do I have an idea how to get back there to take a look at it.

    any suggestions? I'm really close to dumping a bottle of stop leak in there and see if it stops it, but since my collant is still clear and clean, I don't want to dirty the system if I don't have to.

    Thanks guys.

    oh and the leak seems to happen faster when it's hot. in the winter, I replace the coolant every couple months, now it's every couple days before the low coolant light shows up.

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  3. #2
    drb5392's Avatar
    drb5392 is offline Cadillac Owners Member
    Automobile(s): Catera
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    Re: changed HCV and that wasn't the problem.

    You may have an oil cooler gasket leak. The same thing happened to me a year ago. I thought it was the HCV but it turned out to be the oil cooler. Unfortunately it's more expensive to fix than the HCV...Don't put stop leak unless you want to mess up your water pump. GM sells some tablets you can crush up and put in to stop minor leaks...it won't work on a major leak such as you are describing. Good Luck.

  4. #3
    cateraowner is offline Cadillac Owners Fanatic
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    Re: changed HCV and that wasn't the problem.

    did you have to replace the whole oil cooler?

  5. #4
    97diesel is offline Cadillac Owners Member
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    Re: changed HCV and that wasn't the problem.

    I'll offer another possibility. I had an oil leak, and after a little digging, located the leak as coming for the top side of the engine,(though you couldn't see it from top or underneath), dripped down the bell housing, and came down and dripped on the floor by the two bottom bolts of the bell housing. I couldn't feel a leak at the back of the engine, so I started to dismantle the top of the engine, so I could find it. Turns out that underneath the intake manifold, which is below the intake plenum, there are two metal oil tubes that have banjo nut fittings that bolt to the top of the engine block. But now to your issue, above the back banjo nut, which were just loose, is a double banjo nut that supplies coolant to each of the heads. Both of these nuts on mine were also loose. So just a suggestion and option for you to look at. I had mine apart and back together in about 2 hours. Mine is a 2000 Cat. Good luck with your search.

  6. #5
    cateraowner is offline Cadillac Owners Fanatic
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    Re: changed HCV and that wasn't the problem.

    thanks for all the help.

    I have the top off and just wanted to know what you guys think. does this look like it could be the culprit?

    http://farm4.static.flickr.com/3042/...6cd60c.jpg?v=0

    the oil cooler seem relitively dry

    http://farm4.static.flickr.com/3154/...6b8d38.jpg?v=0

    what you guys think?

    is that the coolant bridge? how would I fix that?

  7. #6
    cateraowner is offline Cadillac Owners Fanatic
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    Thread Starter

    Re: changed HCV and that wasn't the problem.

    oh crap.

    I mess up..

    I was tightening up the bolts on the oil cooler and it looks like I over torqued it and broke it.

    does any one know what the part number of this is?

    http://farm4.static.flickr.com/3142/...a00637.jpg?v=0

    or if someone by miracle has an extra one

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