Valvesprings?
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From: Fox Lake IL
Car: 91 Trans Am
Engine: 355 l98 mini ram
Transmission: 700r4
Axle/Gears: stock10 bolt 3:23 gears
Valvesprings?
How do I check to see if I have bad valvespring? I am having some issues with the motor and I was told that this might be one of the problams.
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From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
Re: Valvesprings?
You can remove the valve covers and visually inspect the springs for broken coils.
Bad valve springs will often show up on a manifold vacuum guage as a fluctuating/vibrating guage needle as you rev the motor.
Other than that you have to remove them to test the spring pressure.
Bad valve springs will often show up on a manifold vacuum guage as a fluctuating/vibrating guage needle as you rev the motor.
Other than that you have to remove them to test the spring pressure.
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Joined: Jul 2005
Posts: 1,675
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From: Arab, Alabama
Car: 1988 Trans Am GTA
Engine: 350 4BBL
Transmission: 700R4
Axle/Gears: 3.27
Re: Valvesprings?
Helped me locate valve springs that have "gone away" (gone limp).
It will be obvious.
You can then replace the spring without pulling the head.
Limp springs will not usually show up on a compression test but will show up on a vacuum gauge.
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bluegrassz
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Jan 26, 2004 11:00 AM