Oil pressure on 3.0 V6

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Oil pressure on 3.0 V6

Postby manny » Wed Nov 21, 2012 11:20 pm

Hi all,

my engine has a documented 90k, 1980 auto, i have searched various essex V6 based forums, and as a result i am really confused when comparing my Oil gauge readings:

when cold it registers halfway between the 50-100 psi,( 75.. may be) when warmed and idling it drops towards the 50 , lets say 60, it responds\fluctuates slightly when i gently rev it.
Now the engine does have electronic ignition( LUMENITION), a DRA3830 ( 70amp alternator?)...can i conclude that maybe the previous owner has uprated the oil pump or (more likley..relief valve. It drives OK, and my MOT chap says it in good nick..
i have been reading the following thread with interest but..still confused..
viewtopic.php?f=3&t=17128&hilit=relief+valve
there are no knocks and bangs on start or when running..should i trust the gauge? ..

??

Manny
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Re: Oil pressure on 3.0 V6

Postby scimjim » Wed Nov 21, 2012 11:22 pm

that pressure is great for a 90k engine and there's no reason not to trust the gauge?
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Re: Oil pressure on 3.0 V6

Postby manny » Wed Nov 21, 2012 11:26 pm

so..its within what would be expected for that mileage....or is my engine a good'un and an exception of sorts
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Re: Oil pressure on 3.0 V6

Postby Roger Pennington » Wed Nov 21, 2012 11:34 pm

I'd say it's fine for a good, sound, Essex. The idle pressure is, if it's thoroughly warm, perhaps a bit higher than you'd normally expect, but I'd say that was more cause for rejoicing than worry :)
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Re: Oil pressure on 3.0 V6

Postby mike whiskey » Wed Nov 21, 2012 11:39 pm

Now I'm wondering

Mine is 50 at idle when cold, doesn't go much above, drops to about 40 at idle when warm, straight back to 50 and hold when revved.

No nasty clattery noises so I am guessing all is well!

MW
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Re: Oil pressure on 3.0 V6

Postby Scimher » Wed Nov 21, 2012 11:48 pm

Sounds ok to me.....they do tend to vary a little - if there are no 'funny' noises & oil consumption is reasonable, I'd be happy enough!
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Re: Oil pressure on 3.0 V6

Postby philhoward » Thu Nov 22, 2012 7:25 am

50psi is plenty - and +/- 10% is what you'd like to see hot and at driving speeds IMHO. Only time to get worried is if at any time it goes much over 75psi - but don't forget that the gauges aren't calibrated so are an indication rather than a measurement. Once you know what it reads normally, you're looking for a change at any time.

Manny - i'd say there's a chance the engine has had a refresh at some point; either that or its been very well looked after indeed.

MW - nothing to worry about with yours - the fact its holds 40psi when hot sounds all good to me; don't worry about the fact yours "only" reaches 50psi. Relief valve might be a little tired, but there's still more than enough oil pressure there to keep the engine happy.
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Re: Oil pressure on 3.0 V6

Postby manny » Thu Nov 22, 2012 2:08 pm

cool, thanks for all replies...( and others)upon which i have decided to join the club!!


cheers

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Re: Oil pressure on 3.0 V6

Postby philhoward » Thu Nov 22, 2012 2:23 pm

Welcome! As soon as you get your membership number (should follow in the post in a few days), update your User Profile, then give me a nudge and I'll upgrade your account to suit.
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Re: Oil pressure on 3.0 V6

Postby Gemini Bob » Thu Nov 22, 2012 2:35 pm

Welcome to the fold Manny :D
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Re: Oil pressure on 3.0 V6

Postby Roger Pennington » Thu Nov 22, 2012 3:02 pm

Welcome :D
I think it's important to get out and start driving the car regularly - then you'll find you don't drive with your nose glued to the gauges anyway - just a casual glance every now and then to check they're in the right area (needles pointing down-ish). I did about 35 miles in the yellow peril yesterday, and I couldn't tell you what the gauge said. :wink:
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Re: Oil pressure on 3.0 V6

Postby Taggers » Thu Nov 22, 2012 3:16 pm

They said you've got no oil pressure and the alternator's packed up.
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Re: Oil pressure on 3.0 V6

Postby Roger Pennington » Thu Nov 22, 2012 6:49 pm

:lol:

More seriously, I think I would notice if they deviated significantly from the norm (that's if I wasn't distracted by the engine disintegrating!), but I don't normally register it. Anyway, just for you, today I made a point of noticing that the normal running pressure was pointing to the 5 kg/sq cm mark, which is about 71 psi if my maths is correct. :)
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Re: Oil pressure on 3.0 V6

Postby manny » Thu Nov 22, 2012 11:45 pm

Roger Pennington wrote:Welcome :D
I think it's important to get out and start driving the car regularly - then you'll find you don't drive with your nose glued to the gauges anyway - just a casual glance every now and then to check they're in the right area (needles pointing down-ish). I did about 35 miles in the yellow peril yesterday, and I couldn't tell you what the gauge said. :wink:



on the button with that, my rad fan packed up last weekend ( well the PO manual switch fell apart) after 30 min cruise....fortunately got home without boiling due to the cold weather, after removing the wheel tray , saw a Kenlowe fan.. :D connected to a relay... :) ...connected to....air...ahhh :shock: , so weekend will sort it out..

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Re: Oil pressure on 3.0 V6

Postby mike whiskey » Wed Apr 24, 2013 12:15 pm

Well what a difference an oil change makes!

My 'fairly static' 40-50 is now 35-40 at warm idle (35 at the point of stall), 50-60 at normal running, 75 at higher speeds before warming through.

Still finding it slightly alarming having become used to the needle being fairly static, to see it drop when off the throttle!

I'm sure I will get used to it!

MW
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