ly7 facts?
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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, ly7 facts? in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; A friend of mine came across the data. I thought these motors ran off of regular fuel?. Engine specifications: 2004 ...
  1. #1
    ztollon's Avatar
    ztollon is offline Cadillac Owners Enthusiast
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    ly7 facts?

    A friend of mine came across the data. I thought these motors ran off of regular fuel?.

    Engine specifications: 2004 3.6L Global V-6 Engine (LY7)
    Configuration 3.6L 60-degree DOHC V-6
    Peak Power (SAE net) Estimated 255 hp @ 6,500 rpm
    Peak Torque 250 lb.-ft./339 Nm @ 2,800 rpm;
    (90% of peak produced from 1,600 rpm to 5,800 rpm)
    Displacement (cc) 3,564
    Bore x Stroke 94 mm x 85.6 mm
    Valvetrain Dual overhead camshaft
    4-valve-per-cylinder
    Roller-finger followers valvetrain
    Hydraulic lash adjusters
    Four-cam continuously variable cam phasing
    Two-stage roller-chain camshaft drive
    Variable Cam Timing Intake: 132 degrees ATDC initial timing
    50 crankshaft degrees advance authority
    Exhaust 111 degrees BTDC initial timing
    50 crankshaft degrees retard authority
    Compression Ratio 10.2:1
    Bore Centers 103 mm
    Firing Order 1-2-3-4-5-6
    Fuel Shutoff 6,700 rpm
    Engine Idle Speed 600 rpm
    Fuel System Sequential port fuel injection (returnless)
    Engine Management Torque-based; Bosch Motronic ME 9 32-bit micro-hybrid controller
    Intake Manifold Dual-plenum, equal-length with 2-position variable volume control (resonance tuned)
    Throttle 68-mm single bore; electronic control (ETC)
    Ignition Individual coil-on-plug; individual cylinder knock control
    Fuel Requirement Premium fuel recommended
    Emissions Controls Dual close-coupled catalytic converters
    (1.15L ultra-thinwall ceramic)
    Positive crankcase ventilation (PCV)
    Intake- and exhaust-cam phasers (EGR)
    Evaporative emissions system


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  3. #2
    aviatordave is offline Cadillac Owners Fanatic
    Automobile(s): 2007 CTS, 1976 Seville (sold)
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    Re: ly7 facts?

    the owner's manual for my '07 3.6 states:

    "If your vehicle has the 3.6L V6 engine (VIN code 7), use regular unleaded gasoline with a posted octane rating of 87 or higher. For best performance or trailer towing, you may choose to use middle grade 89 octane."

    mine runs great on 87

  4. #3
    DavidBoren's Avatar
    DavidBoren is offline Cadillac Owners Enthusiast
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    Re: ly7 facts?

    My LY7 runs great on premium fuel. E93, eat it up. Mmm-mm, Techron.

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  6. #4
    Tlorenzen is offline Cadillac Owners Connoisseur
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    Re: ly7 facts?

    Quote Originally Posted by DavidBoren View Post
    My LY7 runs great on premium fuel. E93, eat it up. Mmm-mm, Techron.
    E93 is 93% ethanol...did you get new injectors?? or do you mean 93 Octante lol.

  7. #5
    DavidBoren's Avatar
    DavidBoren is offline Cadillac Owners Enthusiast
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    Re: ly7 facts?

    Second time I made that mistake, dammit. Yes, 93 octane. I might be stupid.

  8. #6
    Tlorenzen is offline Cadillac Owners Connoisseur
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    Re: ly7 facts?

    Quote Originally Posted by DavidBoren View Post
    Second time I made that mistake, dammit. Yes, 93 octane. I might be stupid.
    That's alright..I misspelled Octane haha.

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