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Cadillac Seville / Cadillac Eldorado Forum Discussion, Post new radiator install, temp issues in Past Cadillac Vehicle Discussion; Sorry for being stupid, I had it in my head that it out flowed from the top hose. I disconnected ...
  1. #16
    curlywurly is offline Cadillac Owners Fanatic
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    Re: Post new radiator install, temp issues

    Sorry for being stupid, I had it in my head that it out flowed from the top hose.

    I disconnected the purge line from the surge tank, and place the hose in a bottle, at idle there was little to no flow, when the gas pedal is pressed the flow increases significantly, to what I would say is normal, it is obviously not blocked.

    When I top off to just below the level mark, about 1/2 inch or so, ice cold engine, once the engine is warm the level goes way up pass the level mark, and a small amount of steam comes out, pre radiator swap all worked fine. No, the surge tank smells of coolant, and the surge tank is brand new.

    Other than this the performance of the car is top notch.

    Guess I'll be borrowing a block test kit this weekend.

  2. #17
    stoveguyy is offline Cadillac Owners Connoisseur
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    The purge line nipple is very close to the water pump. It taps into the coolant crossover casting. At least on a 96 car. Is it the same general location on a 98-99 car?

  3. #18
    Ranger's Avatar
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    Re: Post new radiator install, temp issues

    Yes, it should be in the same place.

  4. #19
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    Re: Post new radiator install, temp issues

    Quote Originally Posted by curlywurly View Post
    Sorry for being stupid, I had it in my head that it out flowed from the top hose.

    I disconnected the purge line from the surge tank, and place the hose in a bottle, at idle there was little to no flow, when the gas pedal is pressed the flow increases significantly, to what I would say is normal, it is obviously not blocked.

    When I top off to just below the level mark, about 1/2 inch or so, ice cold engine, once the engine is warm the level goes way up pass the level mark, and a small amount of steam comes out, pre radiator swap all worked fine. No, the surge tank smells of coolant, and the surge tank is brand new.

    Other than this the performance of the car is top notch.

    Guess I'll be borrowing a block test kit this weekend.
    -------------------------

    Sorry for being stupid
    lack of information or knowledge DOES NOT make you stupid -

    at idle there was little to no flow
    that is troublesome -
    the hollow bolt could be partially plugged -
    do yourself a favor -
    try clearing the hollow bolt as I described -
    it will only take a couple minutes - and could make a big difference -

    now do a search for BLOCK TEST -
    read about it -
    understand what it is - and what it does -

    there are several good videos on YouTube
    showing how to do the test - and what to expect -

    just remember this - compared to the original blue color -
    even the slightest change of color is a POSITIVE reaction -
    and a positive reaction is bad news -

  5. #20
    stoveguyy is offline Cadillac Owners Connoisseur
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    Re: Post new radiator install, temp issues

    found a pic. nipple is on left

  6. #21
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    Re: Post new radiator install, temp issues

    Never realized that hole in the hollow bolt was so small. No wonder that sealant tab residue plugs it up and GM quit using that stuff.

  7. #22
    curlywurly is offline Cadillac Owners Fanatic
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    Re: Post new radiator install, temp issues

    Thanks stoveguyy, I'll clean that out this weekend and see how I get on.

    Ranger, I read so many things about sealant it made by head dizzy, add it, then don't don't add, then back to adding it again, I read that GM stopped using it but then started to use it again as they had an increase in leaks reported by their service departments, I added a single BARS G12BP, for better or worse...now maybe for the worse

    I did check the nipple going into the surge tank, it is clear.

    The purge line on my vehicle goes looks like this

    99 cadillac seville sts egine bay.jpg

  8. #23
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    Re: Post new radiator install, temp issues

    That's because the 99 still had the coolant heated throttlebody - the purge "line" runs from the bolt/nipple to the TB pipe inlet, around the TB and out to the reservoir. Even more hose/pipe to get clogged up due to poor coolant maintenance.

    The 2000 and later use coolant passages cast into the water crossover for throttlebody bore heating and the purge line is a straight shot from the bolt/nipple to the reservoir.

    ("Throttlebody heating": The bore is heated to coolant temperature to prevent part-throttle ice buildup due to venturi effect at the slightly open throttle blade edges. Most prominent on cool, humid spring and fall days or just about summer thunderstorm time.)

    One tube of Bar's Leaks G12BP is the equivalent of 6 tablets of Bar's Leaks HDC (the GM tablets).

  9. #24
    curlywurly is offline Cadillac Owners Fanatic
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    Re: Post new radiator install, temp issues

    I'll clean out as much as I can this weekend, and report back.

  10. #25
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    Re: Post new radiator install, temp issues

    FWIW, you can completely bypass the throttlebody coolant circuit and go straight from the bolt/nipple to the reservoir - use a length of proper sized braid protected rubber fuel line (the braid is inside the rubber outer jacket - you can see the crisscross). Use a screw band clamp at each end.

  11. #26
    curlywurly is offline Cadillac Owners Fanatic
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    Re: Post new radiator install, temp issues

    Was it a bad idea to put the sealant in? Opinions seemed to be mixed on this, see, http://www.cadillacforums.com/forums...-question.html. I did use 50/50 mix of DexCool, and put the sealant in the lower hose.

  12. #27
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    Re: Post new radiator install, temp issues

    I never heard of GM going back to using the sealant tabs. The worst you'll do is clog your heater core, radiator or purge line. IF you have a heat, or cooling system problem, you'll know what to check first. In the mean time I would not loose any sleep over it. Just don't put anymore in next time you do a coolant change.

    Keep in mind that the link posted above was from 2004. Things have changed and we have learned since then.

  13. #28
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    Re: Post new radiator install, temp issues

    Quote Originally Posted by curlywurly View Post
    Was it a bad idea to put the sealant in? Opinions seemed to be mixed on this, see, http://www.cadillacforums.com/forums...-question.html. I did use 50/50 mix of DexCool, and put the sealant in the lower hose.
    ----------------
    that post is from 2004 -
    a lot has changed in the last 9 years -

  14. #29
    mike5514 is online now Cadillac Owners Enthusiast
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    Re: Post new radiator install, temp issues

    If you put sealer in the lower hose and the surge line is flowing you should be OK dont forget your surge tank cap it will release coolant at normal temp if weak. Mike

  15. #30
    curlywurly is offline Cadillac Owners Fanatic
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    Re: Post new radiator install, temp issues

    I loaned the engine block test kit, it's so inexpensive I decided go ahead a try it out ($7 for the fluid), I warmed the car up, filled tester up with test fluid to the line, place tester into surge tank entrance, and squeezed the build several time, maybe 10 or so, many bubbles passed through the test fluid, it stayed blue, however, after several more squeezes the test fluid started to disappear, so I repeated the test pressing down harder on the tester and being really care how I squeezed the bulb, the test fluid still eventually disappeared into the surge tank after 10 or so squeezes, still didn't turn blue, so what is going on here?

    I'm going to clean out the lines/hoses and nipples tomorrow, and repeat test, not sure what to make of the test results.

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