Vs v8 mat sensor thread?

Holden/Delco Tuning. ALDL, OBD 1.5. Circa 1989 to 2004.
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Vs v8 mat sensor thread?

Postby oss96 » Thu May 16, 2019 8:59 am

Does anyone know the mat sensor thread pitch that screws into the intake manifold on the injected 5litre? M14×1.5? Or is it a npt thread? I've heard conflicting info and want to be sure

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Re: Vs v8 mat sensor thread?

Postby Holden202T » Thu May 16, 2019 9:46 am

yeah its M14 ... im pretty sure its 1.5 pitch, i have a tap at home for them, so i can confirm if you need, but its definitely metric.

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Re: Vs v8 mat sensor thread?

Postby antus » Thu May 16, 2019 10:05 am

Its definately a metric pitch - M14x1.5 and its ever so slightly tapered by eye so it tightens when it screws in. I just ran a tap over one to prove it was 14x1.5 and it started taking metal half way down. This taper might be why some people are saying NPT. Im not knowledgeable enough to know if thats normal, but ive definitely installed one to a hole tapped with M14x1.5 and it tightened up and its been fine.
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: Vs v8 mat sensor thread?

Postby antus » Thu May 16, 2019 10:06 am

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Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: Vs v8 mat sensor thread?

Postby oss96 » Thu May 16, 2019 10:52 am

Cheers fella's I was pretty certain it was m14×1.5, but after another bloke said it was npt I was a bit hesitant to go and drill, tap a thread in a new manifold if it was wrong.

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