two torque sequences?
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Northstar Engines and System Technical Discussion Discussion, two torque sequences? in Cadillac Engine Technical Discussion; i've heard of two torque procedures for the heads now, one is 22 lb/ft + 90 degrees + 90 degrees ...
  1. #1
    chance_b's Avatar
    chance_b is offline Cadillac Owners Member
    Automobile(s): '94 pearl sts
    Join Date
    Aug 2005
    Location
    'sauga, ON, Canada
    Posts
    99

    two torque sequences?

    i've heard of two torque procedures for the heads now,

    one is 22 lb/ft + 90 degrees + 90 degrees

    i've also heard 30 lb/ft + 70 degrees + 60 degrees + 60 degrees
    this 2nd procedure seems more related to the newer engines,

    for a '94 northstar that's been timeserted, which sequence should i go with? thanks!

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  3. #2
    haymaker is offline Cadillac Owners Fanatic
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    Re: two torque sequences?

    The original torque spec. for the early N* if I remember correctly is 22 lb/ft plus 60+60+60 degrees torque angle. Since you have time-serted the block any combination of the different torque values should work. After time-serting the block I used the 30 lb/ft plus 70+60+60 torque angle on mine but this was done using a torque angle gauge (which IMHO is a difficult tool to use accurately). When I do the next head gasket job on a N* I plan to use the 30 lb/ft plus 90+90 degrees of torque angle method and leave the torque angle gauge in the drawer.

  4. #3
    chance_b's Avatar
    chance_b is offline Cadillac Owners Member
    Automobile(s): '94 pearl sts
    Join Date
    Aug 2005
    Location
    'sauga, ON, Canada
    Posts
    99

    Re: two torque sequences?

    thanks a lot! hopefully the heads will be on tonight then, and i'll get pics of my homemade locator dowels and post them up after i see how they work out.

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