4.5 head gaskets - Page 2
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HT4100 4.1, 4.5, 4.9 Discussion, 4.5 head gaskets in Cadillac Engine Technical Discussion; Originally Posted by the recluse You should know even before the engine ever runs, as usually the blocks fails the ...
  1. #16
    drewsdeville is offline Cadillac Owners Master
    Automobile(s): 2011 Crown Vic LX
    Join Date
    Oct 2004
    Location
    Oak Creek, WI
    Posts
    5,321

    Re: 4.5 head gaskets

    Quote Originally Posted by the recluse View Post
    You should know even before the engine ever runs, as usually the blocks fails the 90 lb pass almost immediately. The biggest problem is paying the $250+ dollars for the head gasket kit again when it does.

    Good luck....
    Yeah, in my two instances, I couldn't even reach 90ft/lbs on the torque wrench before the threads let go. You can tell if it feels right or not.

  2. #17
    raymondk is offline Cadillac Owners Fanatic
    Automobile(s): 88 CPE DV, 93 ELDO TOURING
    Join Date
    Apr 2004
    Location
    ZEBULON, NC
    Age
    66
    Posts
    134

    Re: 4.5 head gaskets

    I finally got it back together almost 3 years later. I installed the reconditioned heads with the old gaskets to test the bolts. All were OK. Then I reinstalled the heads with new gaskets. It runs well except for the "main thump" which is now what I'm working on. I have driven it 8,000 miles and it gets 26 mpg at 65. I have the pan off and everthing looks like new.There is no sign that it was ever full of water. I didn't drive the car until the intake gasket failure so I don't know when the thump started. Never did find out where the braided ground wire on the alternator was supposed to connect.

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