84 Coupe Deville Project - Page 11
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 84 Coupe Deville Project in Past Cadillac Vehicle Discussion; Square gauges were used on 82 to 85 Olds 98's. They were below the speedo cluster and were an option ...
  1. #151
    carnut is offline Cadillac Owners Master
    Automobile(s): 1988 Allante' (sold), 1984 Eldorado, 84 Sedan DeVille
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    Re: 84 Coupe Deville Project

    Square gauges were used on 82 to 85 Olds 98's. They were below the speedo cluster and were an option mostly found on the diesel cars.

  2. #152
    csbuckn is offline Cadillac Owners Master
    Automobile(s): 84 Coupe w/500
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    Re: 84 Coupe Deville Project

    Here's the latest video...Hopefully one of these youtube links work
    http://youtu.be/sZA3Tdx5ZNo
    <iframe width="640" height="360" src="http://www.youtube.com/embed/sZA3Tdx5ZNo?rel=0" frameborder="0" allowfullscreen></iframe>
    This noise started yesterday. I took a drive to a meat market about 30 minutes away and parked it for about 15 minutes, no hard driving and no noise when parked. Come outside, start it and hear the noise but its quieter and goes away when you hit the gas. The car runs fine, just a noise, I see nothing wrong under the hood but it sounds like its the valvetrain on the passanger side. Drive home 30 minutes with no problems, just the noise at stoplights. Took the valve covers off and see nothing out of place, even with the engine running. I disconnected the tranny and still have the noise, I'm starting to think its the oil pickup tube loose. I have a friend with an inspection camera coming soon so we can take a peak in the oil pan. We'll see what happens. It runs fine and, even though I havent put a gauge on it, it runs like it has good oil pressure. Then noise is getting worse and worse the more the engine runs but the motor runs fine.

  3. #153
    csbuckn is offline Cadillac Owners Master
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    Re: 84 Coupe Deville Project

    So I just spent some time out with the car. I was able to get it up to temp with no problems and it ran fine. The more the temp went up, the quieter the sound got, to the point that it would go away until I'd hit the gas, then made the sound when the RPMs went back down. I was under the car with it running with and automotive stethoscope and it sounds like its coming from the very bottom of the pan right around the area that the pickup tube comes from. It doesnt sound like a bearing to me because its not in tune with the RPM and the sound is very random. Another video of some of last night and then the noise today.
    http://youtu.be/rZpgwXx3kDw

  4. #154
    outsider is online now Cadillac Owners Connoisseur
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    Re: 84 Coupe Deville Project

    sounds like you should take the oil pan off and have a look!

  5. #155
    dennis93coupe's Avatar
    dennis93coupe is offline Cadillac Owners Connoisseur
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    Re: 84 Coupe Deville Project

    I'd pull the oil filter and cut it open, look at the paper for metal.

  6. #156
    csbuckn is offline Cadillac Owners Master
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    Re: 84 Coupe Deville Project

    Dropped the oil and filter and cut it open, everything looks good. Looks like I'll be pulling the pan...

  7. #157
    carnut is offline Cadillac Owners Master
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    Re: 84 Coupe Deville Project

    I'd check the flywheel to torque converter bolts.

  8. #158
    csbuckn is offline Cadillac Owners Master
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    Re: 84 Coupe Deville Project

    It is the flexplate to crankshaft bolts, they are loose and the flexplate moves back and forth a little. Just glad to see its not another bearing. Thanks again.
    outsider and outsider like this.

  9. #159
    carnut is offline Cadillac Owners Master
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    Re: 84 Coupe Deville Project

    Make sure the flex plate holes aren't elongated! Make sure they're the correct bolts as well, not too long.

  10. #160
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    jayoldschool is offline GM RWD V8 addict
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    Re: 84 Coupe Deville Project

    Loctite!
    BigCadMan_1 and BigCadMan_1 like this.

  11. #161
    csbuckn is offline Cadillac Owners Master
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    Re: 84 Coupe Deville Project

    Got the new flexplate on, everything is back to normal. One of the bolts was almost all the way out, had about a turn or two left before it fell out.

  12. #162
    cadillac_al is offline Cadillac Owners Connoisseur
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    Re: 84 Coupe Deville Project

    What a pain huh? I am always scared of that happening. I always loctite them and torque them extra tight. You must have most of the bugs out of it now so it's time to enjoy it.

  13. #163
    csbuckn is offline Cadillac Owners Master
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    Re: 84 Coupe Deville Project

    So I'm having trouble with the battery setup I have in the Coupe. I'm running two 78 series batteries in parrallel and they keep draining. This did happened when I had them in the 90 but not as fast. I just got two new batteries under warranty so I dont want these to go bad again. This is the third set of batteries(thanks to the warranty) and I hate going out to the car to see the dome lights not come on, its upsetting. Do I have these wired correctly? Batteries running parrallel, positive to positive-negative to negative. Alt wire going to one battery. One battery powers the starter, one powers the acc terminal. Should I isolate the batteries and run an alt wire to both? After charging the batteries, the car will have power from anywhere from a day to a week. Sometimes when I turn the key off, a couple dummy lights will blink and drain the battery. I can cycle the key on and off and the blinking dummy lights will go off. Got me thinking I should look into my ignition now but is the dual battery setup right?

  14. #164
    jayoldschool's Avatar
    jayoldschool is offline GM RWD V8 addict
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    Re: 84 Coupe Deville Project

    Why not just run one battery? You can get battery isolators from an RV shop, but you really shouldn't need two batteries. One good 78 is more than enough.

  15. #165
    csbuckn is offline Cadillac Owners Master
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    It starts a little better with two batteries. When I use one battery, it has a hard time cranking it over and sometimes dies before it starts. Maybe I should try one battery and sees if it drains.

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