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

LT1 diaphragm replacement

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Old Feb 4, 2011 | 07:49 AM
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cgantner5150
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Default LT1 diaphragm replacement

Anybody know if there is a replacement diaphragm available for the LT1 fuel pressure regulator? I purchased an adjustable kit and didn't realize that it doesn't come with one - mine is bad (holds no vacuum).
I hate to buy a new one just to hack it apart.

Thanks.
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Old Feb 4, 2011 | 07:27 PM
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Originally Posted by cgantner5150
Anybody know if there is a replacement diaphragm available for the LT1 fuel pressure regulator? I purchased an adjustable kit and didn't realize that it doesn't come with one - mine is bad (holds no vacuum).
I hate to buy a new one just to hack it apart.

Thanks.
You may want to check the part you got. The L98 regulator
has torx screws holding the top on, the LT1 regulator looks
to be crimped together.
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Old Feb 4, 2011 | 08:40 PM
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I just took my LT1 frp apart - you have to grind the lip of the hat off. Checked the diaphragm and no rips or holes. Put the replacement hat on with the adjuster screw and it holds vacuum so hopefully it is all good.


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Old Feb 4, 2011 | 09:56 PM
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Sorry, i didn't know that's how they make those. :o
I hope you get it working.
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