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#1 |
Registered User
Join Date: Jun 2018
Location: Indianapolis IN
Posts: 114
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Oil pressure gauge
So before I installed my new engine, I had oil leaking from the back side of my oil pressure gauge. When I installed the new engine I replaced the copper line from the engine to the gauge and got the fitting nice and snug on the back side of the gauge. Well, it still leaks, which sucks because it leaks down my dash and drips onto the passenger floor, right where I am getting ready to install new carpet. My question, has anyone seen the actual gauge leak? Like maybe I need a new gauge, or is it more likely the compression fitting that goes into the back of the gauge?
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#2 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,513
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Re: Oil pressure gauge
Quote:
It may have the wrong fitting on the gauge end of the line. The gauge end of the line needs a compression sleeve nut to screw into the gauge. Here is what the fittings should look like. Can you post a picture of the line you bought? LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#3 |
Registered User
Join Date: Jun 2018
Location: Indianapolis IN
Posts: 114
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Re: Oil pressure gauge
I absolutely have the compression sleeve nut. The kit I bought only came with the other type, so I went to a good local mom and pop auto store and they had the compression nuts for the 1/8th inch line.
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#4 |
Registered User
Join Date: Jun 2018
Location: Indianapolis IN
Posts: 114
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Re: Oil pressure gauge
I just cant tell if it is leaking from where the oil line goes into the compression nut, or where the compression nut goes into the back of the gauge, or if it could possibly be the gauge itself.
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#5 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,513
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Re: Oil pressure gauge
Quote:
LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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#6 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Oil pressure gauge
Put yer phone back there and take a video while its doing it!
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#7 |
Old Duffer
![]() Join Date: Mar 2003
Location: Maine
Posts: 1,821
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Re: Oil pressure gauge
One other little tidbit.... too tight is as bad as not tight enough - it distorts the ferrule.
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'68 Short C20 Flatbed Dually w/ 292 4bbl, Langdon cast headers, and WC T5 trans. '81 G10 Shorty Van "Good judgement comes from experience, and a lot of that comes from bad judgement." Will Rogers "Under promise, then over achieve." |
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#8 |
Registered User
Join Date: Jun 2018
Location: Indianapolis IN
Posts: 114
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Re: Oil pressure gauge
That makes sense. It's really tough to tell where the leak is coming from because it's a very slow leak. It's kinda like having a plumbing leak under your sink, only you get one drip of water every 30 seconds, and you're checking every nut in the p-trap because it could be any one of them. I have tried watching it while it runs, but it doesn't show up. I think I will just replace the compression nut and clip the line back a bit and try again. If that doesn't fix it, probably a new gauge?
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#9 |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,156
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Re: Oil pressure gauge
You may have to cut a 3/8" or so off the end of the tube. Before you put your new compression fitting on. Someone may have really reefed on it in the past and distorted the tube. Did that to myself many moons ago.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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