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

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Old Jan 23, 2002 | 10:26 PM
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Okay, I keep hearing that people have pucks missing from their plugs when they pull em: "had 5 of the 8 pucks missing!". etc.

What the hell is a puck and where is it located. Specifically.

I just pulled all 8 plugs on an LT1 with 102K miles. They all looked fine, but all had a large gap: .065 to .070. So do I have pucks missing? [IMG][/IMG]

The books calls for .050 gap. Is that what everyone is running?
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Old Jan 24, 2002 | 12:27 AM
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Default Re: stupid question category (emoshn)

Must not be a stupid question as 20 people have read and no-one has answered. I am curious as well ant this will get you ttt.
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Old Jan 24, 2002 | 04:45 AM
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Default Re: stupid question category (emoshn)

Never had this happen but I thought the "pucks" were the pieces at the very top of the plug (under the arm that you adjust when gapping)

It should be interesting to see where this goes :D
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Old Jan 24, 2002 | 09:39 AM
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Default Re: stupid question category (90EXPVette)

The platinum part of the electrode was just a small piece welded onto the center electrode, instead of the whole electrode being platinum. In the early days of this plug, the platinum puck would come off due to bad construction and end up in the motor. I have heard that they solved this problem, but am not sure.
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Old Jan 24, 2002 | 09:53 AM
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Default Re: stupid question category (mike72)

I just pulled all 8 plugs on an LT1 with 102K miles. They all looked fine, but all had a large gap: .065 to .070. So do I have pucks missing?
yup.. as said above, the pucks are on the arm of the spark plug that you gap. If the puck is there, you will see a small round dot directly over the electrode. If it looks like an ordinary spark plug, then the puck is missing. By the sounds of your plug gaps, they are all missing.
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