C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

IAC Valve

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Old Apr 14, 2006 | 12:36 AM
  #1  
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Default IAC Valve

I have a 90 and am going to replace my IAC valve. Ive read that I need to set the pintle lenght before I install it. How long should it be exactly?
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Old Apr 14, 2006 | 02:20 AM
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What you want to do is retract the pintle fully before installing it. To do this, hold the IAC firmly in one hand with the pintle under your thumb like a pushbutton handle. Now, rock (gently) the pintle back and forth while pushing the pintle down towards the housing. The pintle should make a ratcheting sound as you force it to retract.
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Old Apr 14, 2006 | 07:19 AM
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From the mating surface to the tip of the printel 25mm. When I bought a new one it was already retracted, measure it first, if not 25mm min. follow morley's instructions.
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Old Apr 14, 2006 | 09:45 AM
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Thanks guys, that seems easy enough!
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Old Apr 14, 2006 | 11:36 PM
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It's not an 'adjustment' really, it is more like 'insurance' that the pintle doesn't get damage from installing it.
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Old Apr 15, 2006 | 06:51 AM
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Originally Posted by Morley
What you want to do is retract the pintle fully before installing it. To do this, hold the IAC firmly in one hand with the pintle under your thumb like a pushbutton handle. Now, rock (gently) the pintle back and forth while pushing the pintle down towards the housing. The pintle should make a ratcheting sound as you force it to retract.
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