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Old 10-13-2012, 05:23 PM   #1
Scooby Newbie
Member#: 307161
Join Date: Jan 2012
Chapter/Region: NESIC
Location: Massachusetts
2008 wrx

Default oil pressure gauge, sandwich plate question

I bought an oil pressure gauge from glow shift (and by bought I mean my friend gave it to me for free, I know glow shift is rice) its from a few years ago though, still unopened.

I bought the sandwich plate adapter from glow shift specifically for my car and I went to screw the oil pressure sensor into one of the holes on the sandwich plate and after I thread it in a little less than halfway it starts to get really tough like the threads don't match up or are they not supposed to thread in all the way?

I checked to make sure they didnt have car specific gauges to see if maybe I had the wrong one. Are you supposed to be rough with them screwing them in? I'm pretty sure that never works on anything and I don't want to be cross threading and destroy everything.
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Old 10-13-2012, 08:23 PM   #2
Member#: 198281
Join Date: Dec 2008
Chapter/Region: MAIC
Location: Virginia
2005 WRX/STi
WRB of course


They may be tapered threads, in which case they will tighten the further in they go but it will never bottom out. This is how the threads seal. If they are tapered they will need something like thread sealant or teflon tape on the threads.
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Old 10-14-2012, 01:00 AM   #3
Patrick Olsen
NASIOC Supporter
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
1997 Legacy 2.5GT
1996 Impreza coupe


Presumably Glow Shift is smart enough to make their sandwich adapter with the same threads as their own sending units. Check their website and/or the documentation provided with each product - it should say right on it what the thread is. It's probably 1/8" NPT or 1/8" BSPT.
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