4.6 N* Cylinder walls - Page 2
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Northstar Engines and System Technical Discussion Discussion, 4.6 N* Cylinder walls in Cadillac Engine Discussion; Your "99" engine actually sounds like a 00+. 00+ engines don't have the valve reliefs on their pistons, and basically ...
  1. #16
    maeng9981's Avatar
    maeng9981 is offline Cadillac Owners Connoisseur
    Automobile(s): 14 SRX, 00 SLS, 99 Deville 50-year Anniversary
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    Re: 4.6 N* Cylinder walls

    Your "99" engine actually sounds like a 00+. 00+ engines don't have the valve reliefs on their pistons, and basically everything won't match with the 93-99 engines. Look for the engine identification code (9 letter/digits - for example, 6XU789012) and look at the second letter. If it's X, it's a 99 engine. If it's Y, it's a 00 engine. Although there are some exceptions, since some late 99 cars came with 00 blocks. See #2.


    99 engines don't have coil cassettes but they have 4 coil packs sitting on top of the rear cam cover with 8 spark plug wires.


    00 engines have coil-on-plug design with 2 coil cassettes, front and rear. Neither 93-99 style coil packs nor spark plug wires for 00.


    Another way to tell, if your heads have the 3/5 cylinder (and 4/6 cylinder) spark plug holes separated, it's a 99. Flat tappet cam follower design for the 93-99.


    If they are connected with a place for the coil cassette spring, it's a 00. Roller cam follower design for the 00+.


    Images searched from Submariner409's albums, my personal stash, and Google.


  2. #17
    tero is offline Cadillac Owners Member
    Automobile(s): 1996 cadillac elorado
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    Re: 4.6 N* Cylinder walls

    thanx maeng

    So there's noway i can flange something together?
    i have to find a pre 2000 block?

  3. #18
    maeng9981's Avatar
    maeng9981 is offline Cadillac Owners Connoisseur
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    Re: 4.6 N* Cylinder walls

    No. 99 and 00 are whole different engines. Cannot mix and match.

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  5. #19
    stoveguyy is offline Cadillac Owners Connoisseur
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    I talked to a seller of a 99 Sts. He serted the block last year and now he has a bad rod. Too bad it's crazy expensive to gut the serted block and install new crank/rods/pistons. I see core motors for sale often. Junkyards are full of them

  6. #20
    tero is offline Cadillac Owners Member
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    Re: 4.6 N* Cylinder walls

    that will be my next phone call
    Here's something else
    on the '96 block the heads have different exhaust ports
    one is round and the other is d shaped
    is this common, or was it just a bad day at the plant?
    thanx

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