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Today, 03:59 AM | #1 |
70+ ( Old Skool Club )
Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,094
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Factory Oil Pressure Gauge Leaking
No mine isn't leaking but something clicked on me the other night. The factory oil pressure gauge in our trucks has a " live feed " with hot oil running through it although the factory did it through copper tubing. I haven't heard of this but a friend said he has, has anyone ever experienced, or know someone who has, the oil pressure gauge blowing up while your driving and hot oil going all over the place in the cab and onto your feet. I Googled the threads here but all I could find is threads on dripping oil from the copper lines.
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
Today, 07:48 AM | #2 |
Registered User
Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,278
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Re: Factory Oil Pressure Gauge Leaking
Never had a copper line or gage go . My 66 Chevelle has the original copper as does my 62 Lark . They do tend to seep after time but not drip . I have seen the plastic aftermarket tubing crack and split .
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Mark 72 c20 custom camper Husky edition, 66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark 1969 AMX , 1968 c20 stepside ,85 K20 1977 Suburban sold 68 anniversary. |
Today, 09:48 AM | #3 |
Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,217
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Re: Factory Oil Pressure Gauge Leaking
The factory oil gauge supply lines are steel. At least the one on my truck is, and I know that it is original. I put a magnet on it just a couple of minutes ago to verify.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
Today, 10:50 AM | #4 |
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Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,197
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Re: Factory Oil Pressure Gauge Leaking
I have serviced hundreds of trucks with this kind of gauge. The original tubing is steel like Steve says. The only leaks I have seen have been from the connection.
George |
Today, 11:15 AM | #5 |
Senior Member
Join Date: Jan 2005
Location: CA
Posts: 5,358
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Re: Factory Oil Pressure Gauge Leaking
I have bought a lot of gauge clusters recently and I've seen two or three where there had been a slow leak from the oil pressure gauge area. These clusters were a bit grimy down low around the gauge, but that was about it.
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Today, 01:10 PM | #6 |
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Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,611
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Re: Factory Oil Pressure Gauge Leaking
I don't know if worst case scenario would be very bad. 60 psi coming through very much smaller than one square inch cross section tube is pretty much just a dribble. When I removed my instrument cluster to work on it, and I found it necessary to start up the truck and move it from one side of the driveway to the other, I just put a pan on the floor and let the tube dribble into there. I could run the engine quite a long time and accumulated just a little bit of oil on the pan.
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Today, 01:16 PM | #7 |
Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,217
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Re: Factory Oil Pressure Gauge Leaking
You're lucky. I did a similar thing on my '69 Camaro, and the oil shot out in a stream about 3 feet long. That was over 50 years ago and not something I'll easily forget.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
Today, 01:17 PM | #8 | |
70+ ( Old Skool Club )
Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,094
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Re: Factory Oil Pressure Gauge Leaking
Quote:
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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Today, 01:18 PM | #9 |
70+ ( Old Skool Club )
Join Date: Nov 2003
Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,094
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Re: Factory Oil Pressure Gauge Leaking
I guess the line is steel. I have never paid much attention to it and when saw it it looked brown in color so thought was copper.nI see now its steel and can see rubberhose around it. Did a recent engine swap but still using original line although the gauge is not an original as was in the dash I bought from a board member and been in the truck now since 2016. Sounds like my paranoia is unjustified so will carry on with what I have now.
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
Today, 01:21 PM | #10 |
Senior Member
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,611
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Re: Factory Oil Pressure Gauge Leaking
Well since Steven had a different experience than me, it is possible my experience is not the norm. I think some experimentation is necessary. Everybody take loose your oil tube and run it into a pan, and start up the truck, and report back your results here. :-)
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Today, 02:18 PM | #11 |
Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,141
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Re: Factory Oil Pressure Gauge Leaking
I've never seen an original line with the correct fittings leak. I've seen lots of leaks when folks try to use a hardware store plumbing compression ferrule instead.
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
Today, 02:48 PM | #12 |
Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,217
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Re: Factory Oil Pressure Gauge Leaking
Pretty sure that the general didn't ever use copper for a pressure line. It work hardens and cracks. There's going to be engine vibration, which would be enough.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
Today, 02:53 PM | #13 | |
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Join Date: Mar 2002
Location: Pittsburg Ca
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Re: Factory Oil Pressure Gauge Leaking
Quote:
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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