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www.ColoradoClassicBroncos.com - View topic - 1 qt low = 30/40 psi down?
It is currently Mon Nov 25, 2024 1:58 am



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 1 qt low = 30/40 psi down? 
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Post 1 qt low = 30/40 psi down?
Tonight on my way to the gym I noticed my oil pressure was low. Running ~ 60mph I was only pushing 10psi. I let the truck sit for about an hour while i worked out, came out and checked the oil. Found it to be about a quart low. (Massive oil leaks from the seals. Marks more territory than a pack of dogs who've drank a pot of coffee.) Threw a quart in the pan and fired it up and drove home. Oil PSI on the way home was between 50-60psi.

That sound about right? Or should I be looking at something else to pinpoint that low oil pressure issue?

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Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

1973 Stroppe Baja project


Mon Sep 17, 2012 10:12 pm
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Post Re: 1 qt low = 30/40 psi down?
One quart low shouldn't result in that kind of loss, do you have the right oil tube and dip stick combo?

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Tue Sep 18, 2012 6:23 am
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Post Re: 1 qt low = 30/40 psi down?

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Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

1973 Stroppe Baja project


Tue Sep 18, 2012 7:44 am
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Post Re: 1 qt low = 30/40 psi down?
Appears to be the appropriate dipsticks and tube. Ran 50+ PSI this morning after I added another quart. Now I'm sitting on the side of the interstate with my hazards on after it flooded out, two big backfires, and sputtered to a stop. :laughing2:

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Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

1973 Stroppe Baja project


Tue Sep 18, 2012 9:00 am
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Post Re: 1 qt low = 30/40 psi down?
Did the needle and seat stick open causing it to flood? If its two to three quarts low the oil pressure would drop that much but not just one quart, do you put six quarts in with oil changes?

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75' bronco, 302, carb'd for now, i'm gathering parts for efi, 3g alternator, saginaw pump, 4x4x2 box, fw hp44, fw 9", N.P. 435 w/ gearbanger shifter, twin stick'd dana 20, 2" BL, 5.5" wildhorses lift, and 35" km2's


Tue Sep 18, 2012 9:48 am
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Post Re: 1 qt low = 30/40 psi down?
6 I think. Plus a quart in the filter. Needles and seats are good I am pretty sure. Checked voltage on the coil while cranking and was only pulling 4.3. Doesn't sound right, does it? Have Advanced dropping me off a new coil just to be sure.

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Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

1973 Stroppe Baja project


Tue Sep 18, 2012 10:17 am
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Post Re: 1 qt low = 30/40 psi down?
After talking to Corey, I pulled the point and condenser and picked up new ones. Still haven't put them in. Gotta work. But looking at the old ones versus the new ones I would say they are a likely culprit.

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Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

1973 Stroppe Baja project


Tue Sep 18, 2012 1:56 pm
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Post Re: 1 qt low = 30/40 psi down?
ImageUploadedByTapatalk1347998388.567063.jpg

Obviously the old points are on the right.


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Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

1973 Stroppe Baja project


Tue Sep 18, 2012 2:00 pm
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Post Re: 1 qt low = 30/40 psi down?
Is there a burn spot b/t the contacts?

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Tue Sep 18, 2012 4:03 pm
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Post Re: 1 qt low = 30/40 psi down?
Yeah they're pretty toasting. And not much left of the contacts. Swapped in the new points and condenser, set the gap to .018, and fire it up on the first crank.

Now I just need to carry a case of oil with me until next year when I drop in the 351W.

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Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

1973 Stroppe Baja project


Tue Sep 18, 2012 4:20 pm
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Post Re: 1 qt low = 30/40 psi down?
Glad you got her running, and glad I could help, sorry it wasn't faster I just had a waiter to work on when you called

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75' bronco, 302, carb'd for now, i'm gathering parts for efi, 3g alternator, saginaw pump, 4x4x2 box, fw hp44, fw 9", N.P. 435 w/ gearbanger shifter, twin stick'd dana 20, 2" BL, 5.5" wildhorses lift, and 35" km2's


Tue Sep 18, 2012 7:09 pm
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Post Re: 1 qt low = 30/40 psi down?

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Spiritual owner of the now Zoso mobile (1974 Bronco Ranger - EFI 351W-4R70W-ARB front and rear-STC softtop- High Country hood-3 1/2" WH lift- Cross inboard rear shock mnt- Duffs bumpers- Warn 8274- 33's- Cheby disc conversion)


Wed Sep 19, 2012 6:50 pm
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Post Re: 1 qt low = 30/40 psi down?
Oh I'm thinking 1st might have been a conservative estimate. Tonight I pulled in to the drive to turn around and left a fresh, thick trail of new oil on the concrete. Thinking my main seals have gone the way of the do-do. Was hoping to keep it on the road until I got the 351W built but I think I am going to have to park it except for special occasions.

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Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

1973 Stroppe Baja project


Wed Sep 19, 2012 7:49 pm
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Post Re: 1 qt low = 30/40 psi down?
I have forbid Andrew from parking his bronco in the driveway due to his massive oil leak. He goes through about a quart every 3-4 days. But does not wish to purchase new front seals (take a look at my signature line to see why he is upset about it).

So now he pulls straight into the sidewalk - and pukes oil all over it. Don't know why he cant pull parallel to the curb and drain on the pavement....

I look at it as a perpetual oil change, and I do not buy his oil....

I have a few pet peeves, but oil stains in the driveway may be the biggest one... any my son's trucks are by far the worst oil leakers I have ever seen. We are talking the exon valdez and BP Deep Water Horizion oil rig...

Sorry to hijack but your thread just reminded me of my personal situation.

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Thu Sep 20, 2012 6:38 am
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Post Re: 1 qt low = 30/40 psi down?
Nos sweat on the hijack. i too hate oil stains in the driveway. Gotta sell this house some day after all.

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Stroppe'd
1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

The Terrible One
1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

1973 Stroppe Baja project


Thu Sep 20, 2012 2:46 pm
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