1989 Cadillac Brougham Knocking PLEASE HELP!!! - Page 2
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 1989 Cadillac Brougham Knocking PLEASE HELP!!! in Past Cadillac Vehicle Discussion; Whatever your owners manual suggests for your climate. 10W-40?...
  1. #16
    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
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    Whatever your owners manual suggests for your climate. 10W-40?

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    cadillac_al is offline Cadillac Owners Connoisseur
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    Re: 1989 Cadillac Brougham Knocking PLEASE HELP!!!

    Can you even buy straight 30 weight any more? It seems I only see it in the lawnmower section. You might want to double check what was put in there. Try some name brand high mileage 10w30 or 10w40 and see if that helps. Also make sure it isn't just idling too low. The only time the oil light ever flickered on my 92 Deville was when I tried some Carquest 5w30. I went back to 10w30 and the oil light didn't flicker any more. Go figure huh?

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    reelheavy is offline Cadillac Owners Fanatic
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    Re: 1989 Cadillac Brougham Knocking PLEASE HELP!!!

    The prognosis is in and it is a thrown rod. Me and my mechanic torn the car apart today and that is the problem. That 307 was good to me but now it is tome to really get the caddy the way I want it. I am looking for a 472 to go into the car and I am going to make it my project car. I guess its time to go get a car note. And slowly but surely put the car back together the way I want it. I appreciates all you guys help in trying to help me get the issue resolved you all were a great deal of help.

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