2002 STS block test results
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 2002 STS block test results in Past Cadillac Vehicle Discussion; Well, did the test today on my STS. I was curious due to a miss that seems to occur during ...
  1. #1
    Caddydrummer67's Avatar
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    2002 STS block test results

    Well, did the test today on my STS. I was curious due to a miss that seems to occur during the first 30 seconds or so after start-up.
    It clears up after that, so I guessed that some coolant was leaking into the cylinder when the vehicle was off and then after it burned off, the miss disappeared. I took it on a 600 mile road trip and after the trip I got the blinking SES light indicating a miss.

    So, after seveal minutes of drawing the gasses from the surge tank into the test chamber, I finally got the fluid to change color from blue to a blue-green. So, my conclusion is, the HG are going, but are only in the very early stages of failure.
    This is good news as it suggests that the car will still make the trip to Altona or Palatine for an HG job.

    Barely peceptible change though. My wife agreed with me that there was a change toward the green.

    Man, I wish the actual failure point was more predictable. This thing could be good for thousands of miles. Heck, who knows.
    No over-heating issues, no loss of coolant so far. Again, barely perceptable change to the green.

    Odd that the HG would fail at 55,000 miles on an '02.
    Any thoughts? Do I risk it and keep running, or do I take it to Jake or Joe ASAP?
    My opinion is that I might as well get the HG done.
    At this point I can drive the car to get it repaired.
    If I wait, I may have to have it towed, for an extra $800 or so.

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  3. #2
    JimD is offline Cadillac Owners Connoisseur
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    Re: 2002 sts block test results

    Quote Originally Posted by Caddydrummer67 View Post
    ....So, after seveal minutes of drawing the gasses from the surge tank into the test chamber, I finally got the fluid to change color from blue to a blue-green. So, my conclusion is, the HG are going, but are only in the very early stages of failure.
    This is good news as it suggests that the car will still make the trip to Altona or Palatine for an HG job.
    Odd that the HG would fail at 55,000 miles on an '02.
    Not really. Mileage is not the only (or dominant) factor.
    Any thoughts? Do I risk it and keep running, or do I take it to Jake or Joe ASAP?
    My opinion is that I might as well get the HG done.
    At this point I can drive the car to get it repaired.
    If I wait, I may have to have it towed, for an extra $800 or so.
    Since you have decided to repair the beast, why wait and add to the cost?

  4. #3
    98cadillac is offline Cadillac Owners Fanatic
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    Re: 2002 sts block test results

    Quote Originally Posted by JimD View Post
    ...

    Since you have decided to repair the beast, why wait and add to the cost?
    My thoughts exactly. If I had the money to get a head gasket job done, I would be at the garage tomorrow - I wouldn't wait until it croaks.

    Once you get it done, you are going to have an awesome car with one of the major weaknesses eliminated.

  5. #4
    Ranger's Avatar
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    Re: 2002 sts block test results

    If you are not loosing coolant or overheating, I'm not sure I would jump to the HG conclusion just yet.

  6. #5
    basscatt's Avatar
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    Re: 2002 sts block test results

    there is a guy in Minneapolis who is using a different method or repair -

    he drills out the 20 holes in the heads -
    and drills and taps all 20 bolt holes -
    and uses larger - coarse threads - rather than inserts -

    he runs ads on craigslist -
    http://minneapolis.craigslist.org/ws...819744432.html

    here is the contact info - Doug: 651-983-1146

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    Re: 2002 sts block test results

    Not sure which Altona the OP is coming from, but Minn. would be WELL out of his way.

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    Caddydrummer67's Avatar
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    Re: 2002 sts block test results

    Ranger, talking about Jakes shop in Altona, Manitoba. Or near anyway. I guess Winkler is nearby as well.

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    Cadillac Kid03's Avatar
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    Re: 2002 sts block test results

    Damn only 55K miles and HG's are going i'm sorry to hear about it but very happy your saving her.

  10. #9
    basscatt's Avatar
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    Re: 2002 sts block test results

    Quote Originally Posted by Ranger View Post
    Not sure which Altona the OP is coming from, but Minn. would be WELL out of his way.
    ------------------------------------
    the OP is from South Dakota -

    This is good news as it suggests that the car will still make the trip
    to Altona or Palatine for an HG job


    gee - as I remember it - South Dakota is right next to Minnesota -
    and he would probably go right through Minneapolis - to get to Palatine -

    although I could be wrong -

  11. #10
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    Re: 2002 sts block test results

    Actually, I-90 prettty much goes right into Palatine.
    Through Sioux Falls, Southern MN, LaCrosse, then heads South about half way thorugh Wisconsin and in to the Chicago area. About 890 miles.

    Or North on I-29 at Sioux Falls to Fargo and keep going North and then up into Canada to Altona. About 650 miles total.

    Ranger, are you suggesting that the HG aren't likely blown?

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    Re: 2002 sts block test results

    I thought the OP was talking about coming from Altona MI. or Altona Il. I wasn't thinking about Altona Manitoba. Too damned many Altonas.

    I'm just saying you don't have enough evidence to condemn the HG's yet. You are missing two very important symptoms to jump to that (expensive) conclusion (especially on an '02). If it where my car (and money), I'd want a little more proof.

  13. #12
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    Re: 2002 sts block test results

    and MY point was that there is a guy in Minneapolis
    that fixes Northstar head problems -
    that would be much closer to home than Illinois or Canada -

  14. #13
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    Re: 2002 STS block test results

    I should probably do a little more investigation into the miss that I'm gettting. Could be injectors, coil pack, ect. Although, I wouldn't think it would only occur at start-up and then go away quickly if it were either of those things. I also need to clean the TB, which may be a contibuting factor.
    I still think the most likely scenario is that the HG are seeping a small amount of coolant into one of the the cylinders as the car sits.

    I'm pretty much comitted to having the HG done. I've already replaced the tranny and front F55 struts, among other, more minor things.
    I'll likely go with NSP studs. Did my ETC with em and I'm pleased with the results.
    Heck, after that, this thing we'll be basically brand-new.

  15. #14
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    Re: 2002 STS block test results

    IF you even remotely think that your startup miss could be fuel related, check the FPR for leakage at the diaphragm and, if that checks out OK, run a 20 oz. jug of Chevron TECHRON through your next fillup of Top Tier gasoline.

    Google "chevron techron" and "top tier gasoline" for insight. TECHRON is a powerful fuel system cleaner that should be used only once in 3,000 - 5,000 miles and it is a component of the GM recommended Top Tier gasolines.

    To check the FPR, remove the beauty cover and carefully remove the vacuum line connector from the FPR nipple. If any fuel drips, you have a problem. Now plug the FPR vacuum line and start the engine - if any fuel drips from the nipple, you have a problem. FPR held in with a hairpin clip - 2 O-rings, oil the new ones before pressing in a new FPR in exactly the same orientation as the original. If you break the plastic vacuum line, substitute a proper sized length of vacuum hose from the Help! racks at a local parts store. (Bleed off the fuel system pressure using the Schrader valve (tire valve) under the black plastic cap on the fuel rail)

  16. #15
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    Re: 2002 STS block test results

    Quote Originally Posted by Caddydrummer67 View Post
    I also need to clean the TB, which may be a contibuting factor.

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