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Username Post: Oil press. Gauge fitting into intake        (Topic#361904)
"3rd Year" Silver Supporting Member
Posts: 734
Loc: From Memphis to Florida
Reg: 12-01-15
07-26-20 05:54 AM - Post#2799564    

Going to install my oil pressure gauge. What size NPT is the fitting that screws into the intake? Thanks as always guys/ gals


"5th Year" Gold Supporting Member
Posts: 877
Age: 62
Loc: New Westminster BC
Reg: 09-25-13
07-26-20 08:01 AM - Post#2799580    
    In response to Adam63impala

Um, I'm not aware of any oil pressure gauge that screws into the intake manifold?
Do you have a picture of where you plan on installing this gauge?

Steve Duncan
66 Impala 2dr Coupe
Not sure of color yet
work in progress

Frequent Contributor
Posts: 2131
Loc: Orange CA
Reg: 11-07-03
07-26-20 08:45 AM - Post#2799585    
    In response to steve65

It is kinda hard to see back there, so it is understandable that you might have thought it threads into the intake. But the oil pressure sender actually goes into the engine block, not the intake manifold.

- Dave
1964 Impala 4-door sedan

Valued Contributor
Posts: 3474

Loc: Northeast CT
Reg: 06-27-10
07-26-20 09:14 AM - Post#2799588    
    In response to Adam63impala

1/8" NPT = National Pipe Thread. What ever you decide to do, make sure to use only pipe dope, and not anything that contains Teflon. I have seen people crack things when using Teflon since the Teflon reduces any indication as to when something is tight enough. In short, it reduces friction, so you have no idea of how tight it really is. Pipe threads are tapered threads, so all you need is some pipe dope to seal it from leaking. Also, don't use brass fittings, because they might crack from the vibrations, since brass is softer. I speak from experience more than 50 years ago.

Never argue with an idiot. He'll drag you down to his level, then beat you with experience.


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