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further adventures of eBay GT in Naples, FL - oil pressure

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rocannon Avatar
rocannon Gold Member rocannon L
Comanche County, OK, USA   USA
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1967 MG MGB GT "GT From Hell"
what do y'all think of these oil pressures? Supposed to be with engine hot.

Frank



Pogo is right.
—————————————————————-
Nothing beside remains. Round the decay…. Boundless and bare
The lone and level sands stretch far away.



Edited 1 time(s). Last edit at 2016-04-30 01:26 PM by rocannon.


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Rod H. Avatar
Amity, OR, USA   USA
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1964 MG MGB
1968 MG MGB GT
Not good.

I just glanced at the other thread. If I was buying the car I'd figure in the cost and time of rebuilding the engine immediately. At minimum, drop the pan and inspect/replace the rod bearings...then hope for the best.



Friends talking around a fire is the history of mankind.



Edited 1 time(s). Last edit at 2016-04-30 11:14 AM by Rod H..

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Rod H. Avatar
Amity, OR, USA   USA
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1964 MG MGB
1968 MG MGB GT
'70 with electric gauge though, so I'd check with a mechanical gauge. Pretty car!



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HiPowerShooter Avatar
HiPowerShooter James Booker
Lake Winneconne, WI, USA   USA
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1973 MG MGB
Change the oil...

Pressures aren't anywhere near "rebuild" status alone.

If it were 50psi at 3k then I'd be worried. 40/50psi at under 1k idle is still good on an old engine. It's tired, but still perfectly serviceable. If it were a new engine, I'd be worried. I'm assuming it's got some miles on it.



"One test is worth a thousand expert opinions"--Alvin "Tex" Johnston...Boeing test pilot.

"Who do you think you are? I am."...Pete Weber

73 MGB. Tires: Round, black, hold air. Oil: Sometimes old, sometimes new...always slippery. Oil filter: Yellow, usually full of oil. Carbs: 2 SU HIF. Distributor: Yes. Headlights: Not that bright but bright enough. A bunch of other stuff most cars have but not really important enough to itemize. Oh, wait...it has a cool sounding exhaust with stickers on the chrome tips. Really slays the ladies...

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rocannon Avatar
rocannon Gold Member rocannon L
Comanche County, OK, USA   USA
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1967 MG MGB GT "GT From Hell"
here's pressure at idle and at a bit over 3000 rpm



Pogo is right.
—————————————————————-
Nothing beside remains. Round the decay…. Boundless and bare
The lone and level sands stretch far away.



Edited 1 time(s). Last edit at 2016-04-30 12:59 PM by rocannon.


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oil pressure 3000 rpm .jpg

oil pressure at idle .jpg    66.3 KB
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chris Avatar
chris Chris Roop (RIP)
Pendleton, OR, USA   USA
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Look at your temp needle in the pics. That may not be hot. As Rod points out, an electric gauge can give you a wrong reading, usually low.
(Walk on down, electric avenue! And then we'll take you higher!)

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rocannon Avatar
rocannon Gold Member rocannon L
Comanche County, OK, USA   USA
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1967 MG MGB GT "GT From Hell"
Chris,
I noticed that. Those pressures would probably be lower if engine was hot. And I specifically asked for pressures at hot.

Guess I'm picky. I'd expect better pressures for a car that looks like that and for which they're asking over $11,110. And still not at the reserve.

Anyone notice the routing of the clutch line?eye popping smiley

Like I said, I'm no longer bidding.

Frank



Pogo is right.
—————————————————————-
Nothing beside remains. Round the decay…. Boundless and bare
The lone and level sands stretch far away.



Edited 1 time(s). Last edit at 2016-04-30 01:04 PM by rocannon.

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Rod H. Avatar
Amity, OR, USA   USA
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1964 MG MGB
1968 MG MGB GT
This is the time to be picky, and anyone paying that kind of price for the car is paying for an engine that is not tired. You done good. smiling smiley



Friends talking around a fire is the history of mankind.

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ErnieY Avatar
ErnieY Ernie Y
Albatera, Alicante, Spain   ESP
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Looking past the actual numbers the range of the readings suggests to me a faulty sensor reading low, needs verifying with another gauge..

I agree it's not really hot where it is.

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Mustangsix Avatar
Mustangsix Gold Member Jack Collins
Oviedo, FL, USA   USA
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That's where my temp gauge lies when fully warmed up.


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ErnieY Avatar
ErnieY Ernie Y
Albatera, Alicante, Spain   ESP
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Then your gauge is faulty or your engine is grossly over cooling Jack - which is almost as bad for it as overheating !

The N is there for a reason winking smiley

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HiPowerShooter Avatar
HiPowerShooter James Booker
Lake Winneconne, WI, USA   USA
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1973 MG MGB
From what I've noticed "N" should concur with approx 180° at the sending unit. About 1/2 way between "N" and "H" is approx 210°...



"One test is worth a thousand expert opinions"--Alvin "Tex" Johnston...Boeing test pilot.

"Who do you think you are? I am."...Pete Weber

73 MGB. Tires: Round, black, hold air. Oil: Sometimes old, sometimes new...always slippery. Oil filter: Yellow, usually full of oil. Carbs: 2 SU HIF. Distributor: Yes. Headlights: Not that bright but bright enough. A bunch of other stuff most cars have but not really important enough to itemize. Oh, wait...it has a cool sounding exhaust with stickers on the chrome tips. Really slays the ladies...

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ErnieY Avatar
ErnieY Ernie Y
Albatera, Alicante, Spain   ESP
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Relating 'N' to deg C or F winking smiley


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Donthuis Avatar
Donthuis Don van Riet
Rijswijk, ZH, Netherlands   NLD
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With the standard thermostat of 82C in, the needle should be on or very close to the "N" mark. If not either the feeler or the gauge is faulty.
In summer I usually go to the 74C thermostat myself, but the needle position is then below the N but slightly higher than your picture shows.

Even so, if the real temp is right on the fully heated engine, I see nothing to complain about the oil pressures. My values are close to the ones being shown.
Do know BL stated 25 as the absolute minimum oil pressure on (low rpm) idle, but by then you will probably hear the main bearings rumbling. Shortly after this happened to me years ago my original engine block gave up by catastrofic failure. 40 as minimum nowadays on a very hot block feels much better... thumbs up

In reply to # 3253642 by Mustangsix That's where my temp gauge lies when fully warmed up.

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ErnieY Avatar
ErnieY Ernie Y
Albatera, Alicante, Spain   ESP
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The manual actually states 10-25lbs idle and 50-80lbs running.

My pals GT which I've just driven 45 miles home for a LHD conversion - and not like a nun ! - is showing just 40 running and 10 at idle but with no hint of rumblings or other untoward noises, in fact if the oil pressure gauge were not there I wouldn't have know anything was amiss.

Whilst it's most definitely not good then it's not a guarantee of rumblings nor would it seem as much of a harbinger of catastrophe as suggested although I wouldn't want to be driving it much more until it's sorted.

Barry if you're reading this I'll be in touch, I certainly don't remember the pressure being that low when we drove it down from UK and it's not possible we could have not noticed !

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