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Old 11-24-2008, 01:58 PM
Corndog Man Corndog Man is offline
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1999 3.8 Spark Plug Thread size

What is the thread size on the 1999 3.8 LTZ? I have the plug number. Need to get a compression gauge and want to get the right size thread.

I am finally back to doing some diagnostics. I am pretty sure i have a slipped timing chain. I have been checking voltages and everything else and those all seem to check out great. FUel pressure is also in specs. It has to be the timing chain.

14MM?

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Old 11-24-2008, 02:26 PM
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brcidd brcidd is offline
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Re: 1999 3.8 Spark Plug Thread size

Your compression gage will come with any and all thread sizes adapters you need-- yours will be the most common-- if it doesn't- it is a real cheapo gage..I think mine has only two adapters....
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Old 11-24-2008, 02:32 PM
Corndog Man Corndog Man is offline
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Re: 1999 3.8 Spark Plug Thread size

Quote:
Originally Posted by brcidd
Your compression gage will come with any and all thread sizes adapters you need-- yours will be the most common-- if it doesn't- it is a real cheapo gage..I think mine has only two adapters....
It's a cheap one (20 bucks, no adapters). I think the size is right but its so short it wont reach the threads.

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