Checking valve size with heads on engine, possible?
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Joined: Jan 2003
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From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
Checking valve size with heads on engine, possible?
Or would I have to completely remove the head from the block?
Why I am asking is because I have 305 heads on a 350 block and would like to to know if there is a way to decipher between stock 305 valve size and a larger than stock valve size without actually removing the head.
Can I measure the width of the valve with a micro or something like that?
Why I am asking is because I have 305 heads on a 350 block and would like to to know if there is a way to decipher between stock 305 valve size and a larger than stock valve size without actually removing the head.
Can I measure the width of the valve with a micro or something like that?
Thread Starter
Supreme Member
Joined: Jan 2003
Posts: 2,043
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From: San Diego
Car: 1994 Trans Am
Engine: LT1
Transmission: Auto
Axle/Gears: 3.23
I was kind of thinking maybe with the valve cover off, I could measure the top of the valve by the keeper? But guess not.
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
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Originally posted by BigWhiteGTP
I was kind of thinking maybe with the valve cover off, I could measure the top of the valve by the keeper? But guess not.
I was kind of thinking maybe with the valve cover off, I could measure the top of the valve by the keeper? But guess not.
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From: Miami, FL
Car: '85 TA
Engine: Carb'd 350, ported 416s
Transmission: retrofitted T5
Axle/Gears: 3.42 7.62" 10-bolt, locker
you could always take off the intake and the headers and look down the ports. you wouldnt get and exact measurement, but i bet you could probably get a pretty good idea. and if not, youre halfway to removing the head anyway.
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From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
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If you could view inside the combustion chamber you could compare the space beween the intake and exhaust valve in the head , with another stock 305 head with stock valves.
larger valves would have less space between them. 2.02x 1.60 valves almost touch.
larger valves would have less space between them. 2.02x 1.60 valves almost touch.
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