Thread: L67 Mechanical Specs

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  1. #1 L67 Mechanical Specs 
    GT Level Member Swash's Avatar
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    Metric English
    General Data
    • Engine Type 90° V-6
    • Displacement 231 cu in
    • Liter (VIN) 3.8L (K), (1)
    • RPO L36, L67
    • Bore 96.52 mm 3.8 in
    • Stroke 86.36 mm 3.4 in
    • Compression Ratio (VIN K) 9.4:1
    • Compression Ratio (VIN 1) 8.5:1
    • Firing Order 1-6-5-4-3-2

    Lubrication System
    • Oil Capacity with Oil Filter Change 4.25 L 4.5 qt
    • Oil Capacity without Oil Filter Change 3.75 L 4 qt
    • Oil Pressure @ Operating Temperature (1850 RPM) Using 10W-30 Oil 414 kPa 60 psi min
    • Oil Filter Type Throw Away Element and Can
    • Gear Pocket Depth 11.71-11.75 mm 0.461-0.4625 in
    • Gear Pocket Diameter 89.10-89.20 mm 3.508-3.512 in
    • Inner Gear Tip Clearance 0.152 mm 0.006 in
    • Outer Gear Diameter Clearance 0.203-0.381 mm 0.008-0.015 in
    • End Clearance 0.025-0.089 mm 0.001-0.0035 in
    • Valve-to-Bore Clearance 0.038-0.076 mm 0.0015-0.003 in

    Type of Lubrication
    • Main Bearings Pressure
    • Connecting Rods Pressure
    • Piston Pins Splash
    • Balance Shaft Bearing - Front Splash
    • Balance Shaft Bushing - Rear Pressure
    • Camshaft Bearings Pressure
    • Timing Chain Splash
    • Cylinder Walls Splash
    • Oil Pump Type Gerotor
    • Oil Pressure Sending Unit Electrical
    • Oil Intake Stationary
    • Oil Filter System Full Flow

    Cylinder Bore
    • Diameter 96.5 mm 3.8 in
    • Out-Of-Round Maximum 0.0254 mm 0.001 in
    • Taper 0.0254 mm 0.001 in

    Piston (VIN K)
    • Used Piston Clearance (41 mm from Top of Piston) 0.050-0.091 mm 0.0020-0.0036 in
    • New Piston Clearance (41 mm from Top of Piston) 0.010-0.051 mm 0.0004-0.0020 in

    Piston (VIN 1)
    • Used Piston Clearance (41 mm from Top of Piston) 0.0193-0.0997 mm 0.0008-0.0039 in
    • New Piston Clearance (41 mm from Top of Piston) 0.0207-0.0437 mm 0.0008-0.0017 in

    Piston Ring Groove Depth
    • Top Compression 4.019-4.146 mm 0.158-0.163 in
    • 2nd Compression 4.214-4.341 mm 0.0166-0.171 in
    • Oil Control 3.814-3.941 mm 0.150-0.155 in

    Piston Ring End Gap
    • Top Compression 0.25-0.46 mm 0.010-0.018 in
    • 2nd Compression 0.58-0.84 mm 0.023-0.033 in
    • Oil Control 0.254-0.762 mm 0.010-0.030 in

    Piston Ring Side Clearance
    • Top Compression 0.033-0.079 mm 0.0013-0.0031 in
    • 2nd Compression 0.033-0.079 mm 0.0013-0.0031 in
    • Oil Control 0.023-0.201 mm 0.0009-0.0079 in

    Piston Ring Width
    • Top Compression 1.176-1.197 mm 0.0463-0.0471 in
    • 2nd Compression 1.476-1.497 mm 0.0581-0.0589 in
    • Oil Control 1.854-2.007 mm 0.073-0.079 in

    Piston Pin (VIN K)
    • Diameter 21.9950-22.0000 mm 0.8659-0.8661 in
    • Clearance in Piston 0.0020-0.0130 mm 0.00008-0.00051 in
    • Fit-In-Rod (Clearance) 0.0066-0.0217 mm 0.0003-0.0009 in

    Piston Pin (VIN 1)
    • Diameter 22.995-23.0000 mm 0.90531-0.90551 in
    • Clearance in Piston 0.0065-0.0155 mm 0.00061-0.00026 in
    • Fit-In-Rod (Clearance) 0.0073-0.0225 mm 0.00029-0.00089 in

    Crankshaft
    • Main Journal Diameter-All 63.470-63.495 mm 2.4988-2.4998 in
    • Rod Journal Diameter-All 57.1170-57.1475 mm 2.2487-2.2499 in
    • Main Journal Taper-Maximum 0.00889 mm 0.00035 in
    • Rod Journal Taper-Maximum 0.00889 mm 0.00035 in
    • Main Journal Out-of-Round-Maximum 0.00635 mm 0.00025 in
    • Rod Journal Out-of-Round-Maximum 0.00508 mm 0.00020 in
    • Main Bearing to Journal Clearance 1 0.0178-0.0406 mm 0.0007-0.0016 in
    • Main Bearing to Journal Clearance 2, 3 and 4 0.0229-0.0457 mm 0.0009-0.0018 in
    • Rod Bearing Clearance 0.0127-0.0660 mm 0.0005-0.0026 in
    • Crankshaft End Play 0.076-0.276 mm 0.003-0.011 in

    Connecting Rod
    • Rod Side Clearance 0.102-0.508 mm 0.004-0.0200 in
    • Connecting Rod Large End Bore ID 60.295-60.312 mm 2.37378-2.3745 in

    Camshaft
    • Journal Diameter 47.655-46.858 mm 1.8462-1.8448 in
    • Bearing Inside Diameter 1 and 4 46.970-46.934 mm 1.8428-1.8492 in
    • Bearing Inside Diameter 2 and 3 46.977-46.942 mm 1.8481-1.8495 in
    • Bearing-to-Journal Clearance 0.041-0.119 mm 0.0016-0.0047 in
    • Intake Maximum Lobe Lift 6.56 mm 0.258 in
    • Exhaust Maximum Lobe Lift 6.56 mm 0.258 in

    Balance Shaft
    • End Play 0.0-0.171 mm 0.0-0.0067 in
    • Rear Journal Diameter 38.085-38.105 mm 1.4994-1.5002 in
    • Radial Play-Front, Bearing Clearance 0.0-0.026 mm 0.0-0.0010 in
    • Rear Bearing to Journal Clearance 0.012-0.109 mm 0.0005-0.0043 in
    • Drive Gear Lash 0.050-0.125 mm 0.002-0.0049 in
    • Bearing Bore Diameter-Front 51.973-51.999 mm 2.0462-2.0472 in
    • Bearing Bore Diameter-Rear, In Block 47.584-47.612 mm 1.8735-1.8745 in
    • Bearing Inside Diameter-Rear 38.118-38.194 mm 1.5007-1.5037 in

    Valve System
    • Lifter Hydraulic Roller
    • Rocker Arm Ratio 1.66:1
    • Face Angle 46 degrees
    • Seat Angle 45 degrees
    • Minimum Margin 0.635 mm 0.025 in
    • Seat Runout-Maximum 0.050 mm 0.002 in
    • Seat Width-Intake 1.53-2.03 mm 0.060-0.080 in
    • Seat Width-Exhaust 2.29-2.79 mm 0.090-0.110 in
    • Stem Height-All 49.15-50.17 mm 1.93-1.975 in
    • Stem Clearance-Intake 0.031-0.071 mm 0.0012-0.0028 in
    • Stem Clearance-Exhaust 0.036-0.074 mm 0.0014-0.0029 in

    Valve Spring
    • Free Length 49.78 mm 1.960 in
    • Load-Closed 334 N @
    43.69 mm 75 lb @ 1.72 in
    • Load-Open 1014 N @ 32.4 mm 228 lb @ 1.277 in
    • Installed Height 42.93-44.45 mm 1.690-1.750 in
    • Approximate Number of Active Coils 4.48
    • Approximate Number of Total Coils 6.60

    Flywheel
    • Runout-Maximum 0.38 mm 0.015 in
    I'm sorry, I can't hear you over the sound of how awesome I am...
    2004 IBM/Black/A4 GTO -- 1 of 273 - and the slowest
    2002 Galaxy Silver GTP - a few mods - sold
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  2. #2 Re: L67 Mechanical Specs 
    GT Level Member TurboKent's Avatar
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    very nice!! where did you find such a thing?
    2003 Grand Prix turbo intercooled
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  3. #3 Re: L67 Mechanical Specs 
    I say it with pictures Abrasive's Avatar
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    Quote Originally Posted by TurboKent View Post
    very nice!! where did you find such a thing?
    Shannon is what we sometimes refer to as an "idiot savant". LOL! He probably typed it from memory.

    Master Certified Auto Glass Technician - 23+ yrs in the biz.
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  4. #4 Re: L67 Mechanical Specs 
    GT Level Member Swash's Avatar
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    Quote Originally Posted by Abrasive View Post
    Shannon is what we sometimes refer to as an "idiot savant". LOL! He probably typed it from memory.

    Hey - I resemble that remark! Wait....

    Actually, I got it from a friend of a friend and found it when I was organizing some of my files from my rebuild last year...for a new one upcoming.


    -Swash
    I'm sorry, I can't hear you over the sound of how awesome I am...
    2004 IBM/Black/A4 GTO -- 1 of 273 - and the slowest
    2002 Galaxy Silver GTP - a few mods - sold
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  5. #5 Re: L67 Mechanical Specs 
    I live here. SyntheticShield's Avatar
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    Hmmm, I guess I just never got the savant part...
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  6. #6 Re: L67 Mechanical Specs 
    GT Level Member Swash's Avatar
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    Quote Originally Posted by SyntheticShield View Post
    Hmmm, I guess I just never got the savant part...


    Just remember - I still have 7+ months to plot your demise...

    -Swash
    I'm sorry, I can't hear you over the sound of how awesome I am...
    2004 IBM/Black/A4 GTO -- 1 of 273 - and the slowest
    2002 Galaxy Silver GTP - a few mods - sold
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  7. #7 Re: L67 Mechanical Specs 
    I live here. SyntheticShield's Avatar
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    Bring it baby!!!!
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  8. #8 Re: L67 Mechanical Specs 
    I live here. SyntheticShield's Avatar
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    Oh, and not to diminish your efforts, but if you want the specs in document form, you can find them here:
    http://www.grandprixforums.net/f71/g...ject-9519.html
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  9. #9 Re: L67 Mechanical Specs 
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    Good info. Sticky?
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  10. #10 Re: L67 Mechanical Specs 
     

  11. #11 Re: L67 Mechanical Specs 
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    1.66 again?
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  12. #12 Re: L67 Mechanical Specs 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Quote Originally Posted by matt5112 View Post
    1.66 again?
    Its in the mechanical specs, it has to be true!
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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