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Thread: Cherie's '84 Coupe DeVille Project

  1. #136
    jamespowers is offline Cadillac Owners Connoisseur
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    Re: Cherie's '84 Coupe DeVille Project

    Quote Originally Posted by nebulosity View Post
    Got my moving permit to get its emissions tested! So far so good.... crossing fingers......

    Attachment 130833
    Make sure you warm it up good before taking it in. Also leave the heat on full blast. It can't hurt.


  2. #137
    nebulosity's Avatar
    nebulosity is offline Cadillac Owners Fanatic
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    Re: Cherie's '84 Coupe DeVille Project

    Quote Originally Posted by jamespowers View Post
    Make sure you warm it up good before taking it in. Also leave the heat on full blast. It can't hurt.
    I definitely plan on that!

  3. #138
    nebulosity's Avatar
    nebulosity is offline Cadillac Owners Fanatic
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    Re: Cherie's '84 Coupe DeVille Project

    Stranded! Waiting for a tow truck. Caddy backfired a lot and overheated on the highway. Sadly blew the rockar arm cover gasket i just put in. Not sure how that happened.

  4. #139
    lacville78 is offline Cadillac Owners Fanatic
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    Re: Cherie's '84 Coupe DeVille Project

    That sucks, Wonder what happened to it.

  5. #140
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    Re: Cherie's '84 Coupe DeVille Project

    Quote Originally Posted by lacville78 View Post
    That sucks, Wonder what happened to it.
    Huh? "Scratched out the 20"? what are you talkig about?

  6. #141
    lacville78 is offline Cadillac Owners Fanatic
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    Re: Cherie's '84 Coupe DeVille Project

    Quote Originally Posted by nebulosity View Post
    Huh? "Scratched out the 20"? what are you talkig about?
    Oh, I was talking about your trip permit, then posted, but then noticed the trouble, Sorry about that.

  7. #142
    nebulosity's Avatar
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    Re: Cherie's '84 Coupe DeVille Project

    Quote Originally Posted by lacville78 View Post
    That sucks, Wonder what happened to it.
    Im wondering if the engine was getting enough airflow and whether he transmission was shifting when it was supposed to.

  8. #143
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: Cherie's '84 Coupe DeVille Project

    Quote Originally Posted by nebulosity View Post
    Stranded! Waiting for a tow truck. Caddy backfired a lot and overheated on the highway. Sadly blew the rockar arm cover gasket i just put in. Not sure how that happened.
    Not a good sign. Shouldn't be any pressure there.

  9. #144
    lacville78 is offline Cadillac Owners Fanatic
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    Re: Cherie's '84 Coupe DeVille Project

    Now I am worried, how hot did it get? Did it start continue to run for a bit after you turned the key off?
    HT4100 + Overheating = Trouble!

    When you get it back home pull all the spark plugs, and rent a compression tester (free), and run a compression test, and check the condition of the oil.
    I hate to be a pessimist, but it would be best to rule out headgasket issues right away.

  10. #145
    nebulosity's Avatar
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    Quote Originally Posted by turbojimmy

    Not a good sign. Shouldn't be any pressure there.
    Yeah, my thoughts exactly.

    ----------

    Quote Originally Posted by lacville78 View Post
    Now I am worried, how hot did it get? Did it start continue to run for a bit after you turned the key off?
    HT4100 + Overheating = Trouble!
    On the straight-a-ways the engine temp was hovering at about 94C and seemed fine. When we started to climb a couple hills, I got a bunch of backfiring, and a loss of power, at that point it was around 105C, and I was worried because that's above boiling temp of water (although it's only 50% water, 50% ethylene glycol). I had to drive about a minute to pull over in a safe spot (Hwy 17 is nasty and narrow), and when I turned off the engine, the temp was reading 114C. After turning the engine off, it was dieseling for about 1 or 2 seconds.

    Quote Originally Posted by lacville78 View Post
    When you get it back home pull all the spark plugs, and rent a compression tester (free), and run a compression test, and check the condition of the oil.
    I hate to be a pessimist, but it would be best to rule out headgasket issues right away.
    We dropped the car off at a good local shop. It'll be nice to have a fresh pair of eyes check the car over. And I get a small break. I love car work, but man I busted my butt for the last 30 days and I'm exhausted. It feels good to put the Caddy in someone else's hands for a day.

    Oh, I'm sure my previous compression readings are irrelevant now, but compression was decent in all cylinders except #5, which was a bit low. Hopefully I stopped the car before any major damage was done. Regardless though, I'm sure some about of damage has been done because it's not good for cars to overheat even once.

  11. #146
    cadillaccruiser703 is offline Cadillac Owners Member
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    Re: Cherie's '84 Coupe DeVille Project

    Oh man that sounds horrible hope the cad turns out ok

  12. #147
    nebulosity's Avatar
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    Re: Cherie's '84 Coupe DeVille Project

    Quote Originally Posted by cadillaccruiser703 View Post
    Oh man that sounds horrible hope the cad turns out ok
    Thanks, I hope so too. :/

  13. #148
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    Re: Cherie's '84 Coupe DeVille Project

    No bueno...
    Have you thought of maybe swapping engines out, so you won't experience any more problems done the road?

  14. #149
    nebulosity's Avatar
    nebulosity is offline Cadillac Owners Fanatic
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    Re: Cherie's '84 Coupe DeVille Project

    Quote Originally Posted by 1980coupe View Post
    No bueno...
    Have you thought of maybe swapping engines out, so you won't experience any more problems done the road?
    That was my FIRST plan back in early 2012, but California makes it REALLY hard to do engine swaps, and I don't have the extra money to gamble on that kind of thing. I'm hoping someday I'll find out exactly what I would be allowed to put in it (besides a rebuilt ht4100), and finally do a swap on it. I heard wiring harness conversions are part of the trouble too.

    Trust me, I'd really like something else in that engine compartment.

  15. #150
    lacville78 is offline Cadillac Owners Fanatic
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    Re: Cherie's '84 Coupe DeVille Project

    Another concern I have is the condition of the transmission, you mentioned the car not shifting properly, and now there is overheating to consider.
    When the engine gets hot, the transmission does as well. Make sure to check the state of the transmission fluid.


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