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Thread: 1997 350 engine

  1. #1
    Junior Member
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    Question 1997 350 engine

    I have a 1997 350 5.7 in my chevelle. What is the spark plug gap, is it.035 or .045. What should the timing be, TDC or how many degrees before top dead center. The motor is stock.

  2. #2
    Senior Member NCroadracer's Avatar
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    Here are some specs for your 97 5.7 L.... As for the timing, depends on what you're using for an ignition system.


    Engine Mechanical Specifications (5.7 L)
    Application
    Specification
    Metric
    English
    General Data
    • Engine Type
    V8
    • Displacement
    5.7 L
    350 CID
    • RPO (VIN Code)
    L31 (R)
    • Bore
    101.63 mm
    4.0012 in
    • Stroke
    88.39 mm
    3.480 in
    • Compression Ratio
    9.4:1
    • Firing Order
    1-8-4-3-6-5-7-2
    • Spark Plug Gap
    1.52 mm
    0.060 in
    • Oil Pressure (Minimum at Normal Operating Temperature)
    42 kPa at 1,000 RPM
    125 kPa at 2,000 RPM
    166 kPa at 4,000 RPM
    6 psig at 1,000 RPM
    18 psig at 2,000 RPM
    24 psig at 4,000 RPM

  3. #3
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    Hey NC, is that last spec a typo ? My 5.7 specs it at 40psi @ 4,000rpm

  4. #4
    Senior Member NCroadracer's Avatar
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    Quote Originally Posted by crabtruck View Post
    Hey NC, is that last spec a typo ? My 5.7 specs it at 40psi @ 4,000rpm

    No... Those are the Minimum acceptable specs. Seems low, but not a type-o.

  5. #5
    Senior Member Sneakysportsman's Avatar
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    One more thing, make sure your plugs are long enough to go all the way into the combustion chamber. Argued with an idiot @ A*^$3^E Auto about this. Make sure you buy plugs of the proper thread length.

  6. #6
    Senior Member
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    Quote Originally Posted by NCroadracer View Post
    No... Those are the Minimum acceptable specs. Seems low, but not a type-o.
    Went back to check up on my reading.
    Turns out it wasn't a typo
    It was a read-o, you were again right.

  7. #7
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    I would run about 10-12 initial, 38 total all in at 2500 or so.
    Joe
    89 K2500 Chevy, Wee-Oh-five 294K miles
    1962 Scout 80 parts I guess
    1966 Scout 800 resto job
    2005 Chevy 2500HD Short cab long box DURAMAX
    1996 P30, 6.5 NA Mac Mobile
    whole lot of buicks

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