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1987 LC2 stock valvetrain specs

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turbodave231

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Joined
May 24, 2001
Messages
2,287
I gathered this info for the stock 1987 Buick 3.8 LC2 VIN 7 engine. Can we make this a sticky please?

Valve Specifications:

Stem diameter Intake 0.3401-.0.3412
Stem diameter Exhaust 0.3405-0.3412
Valve Installed Height 1.960-2.000
Face Angle 45 degrees
Margin 0.025

Valve Spring

Valve Spring Free Length 2.030
Valve Spring installed height 1.710
Out of Square limit 0.062

Valve Stem to Guide Clearance

Intake .0015-.0035
Exhaust .0015-.0032
Valve Guide inside diameter 0.3437

Valve Arrangement Front to Rear

Right E-I-I-E-I-E
Left E-I-E-I-I-E

Valve Seat

Width
Intake 0.062
Exhaust 0.075-.104

Seat Angle
Intake 46 degrees
Exhaust 46 degrees
Allowable Run Out 0.002
 

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