oil press.

terribleonexx88 · July 12th, 2007, 02:32 PM

im lookin at an 89 lx 5.0 and the oil pressure isnt exactly in the middle of the guage at idle its that normal. it has a 119000 miles and from what i can tell its not beat on at all. even the factory posi still works.

notsoslow50 · July 12th, 2007, 09:23 PM

check for a leak somewhere man..

Stangzilla · July 12th, 2007, 10:35 PM

Originally Posted by terribleonexx88

im lookin at an 89 lx 5.0 and the oil pressure isnt exactly in the middle of the guage at idle its that normal. it has a 119000 miles and from what i can tell its not beat on at all. even the factory posi still works.

Well that depends on how low it is below the middle. Second I would not totally rely on the stock gauge. Some work some dont. Could also be a faulty oil pressure switch..

Rustbelt · July 13th, 2007, 03:36 AM

my old one was in the middle. the one i replaced it with is only reading at 1/3. they are not accurate at all.

jam77 · July 13th, 2007, 12:05 PM

mines kinda on the lower side too, like they said it could be that the gauge is off or if its too low your bearings could be worn.

ThrashN · July 13th, 2007, 12:08 PM

I have over 200,000 miles on my car and the oil pressure runs about 20 at idle and 40 when driving

woody1 · July 13th, 2007, 12:17 PM

those stock gauges are useless, I would certainly not base my decision on that gauge

ryans88gt · July 13th, 2007, 12:48 PM

yeah, it is worth the money to buy a mechanical gauge. At least buy a new sending unit before worrying about the pressure. My stock gauge reads on the second bar above red, but the mechanical gauge reads 45 psi.

tording92lxnotch · July 14th, 2007, 03:19 AM

Get a mechanical guage and check it out. I have 175k on mine and mine is about 26 at idle when hot and 45 when driving hot. Its a good chance its the stock guage or sender.

terribleonexx88 · July 14th, 2007, 06:20 PM

i noticed that the stang (which is now mine) has both valve cover gaskets leaking could that cause lower oil pressure?

mikebert · July 15th, 2007, 12:08 AM

Originally Posted by terribleonexx88

i noticed that the stang (which is now mine) has both valve cover gaskets leaking could that cause lower oil pressure?

Because you're continuously losing oil? Yes.

tording92lxnotch · July 15th, 2007, 03:39 AM

No. Assuming you keep enough oil in the oil pan even if its leaking out of the valve covers that will not lower your oil pressure. Once the oil reaches the top of the heads it is no longer pressurized. It is pressurized as it is forced through your bearings and the bottm of the motor. To get to the top of the head the oil comes up out of the pushrods to lube the rockers then runs back down through passages in the heads into the oil pan. So since the oil just runs back into the heads and oil pan at this point it is not pressurized, therefore if it leaks out of the valve cover instead of going back into the oil pan you will not lose pressure. The only way you would lose pressure is if so much leaks out that your oil pan starts to run dry and your oil pump can no longer pump any oil, then your pressure will drop.

terribleonexx88 · July 15th, 2007, 10:04 PM

its not low on oil so maybe its just the gauge

July 12th, 2007, 02:32 PM	#1
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	oil press. im lookin at an 89 lx 5.0 and the oil pressure isnt exactly in the middle of the guage at idle its that normal. it has a 119000 miles and from what i can tell its not beat on at all. even the factory posi still works. __________________ 85 svo. work in progress

July 12th, 2007, 09:23 PM	#2
notsoslow50 Regular Join Date: Jul 2007 Location: Pennsylvania Posts: 338 iTrader: 0 reviews	check for a leak somewhere man.. __________________

July 13th, 2007, 12:05 PM	#5
jam77 Enthusiast 1987 Mustang GT Join Date: Apr 2007 Location: IL Posts: 685 iTrader: 0 reviews	oil press. mines kinda on the lower side too, like they said it could be that the gauge is off or if its too low your bearings could be worn. __________________ 87 GT, typhoon upper and lower,70mm tb, 90mm maf, bbk shorties, bbk x-pipe, flowmaster cat back, 3:73 gear, pro 5.0 shifter, novi blower,afm power pipe, load IO, Trick Flow heads, Anderson B-31 cam, Anderson PMS, 42 lb injectors, t-rex fuel pump.

July 14th, 2007, 03:19 AM	#9
tording92lxnotch Regular Join Date: Apr 2007 Posts: 165 iTrader: 0 reviews	Get a mechanical guage and check it out. I have 175k on mine and mine is about 26 at idle when hot and 45 when driving hot. Its a good chance its the stock guage or sender. __________________ 92 notch--Shorty headers--Pro 5.0--3G alt--U/D pullies--A/C delete--190 LPH Walbro FP--Compucar N2O kit--FMS alum D/S--Taurus fan--Weld Draglites--Mallory 685 ign Box--dccontrol fan controller 13.0 - 108 mph - 1.9 60' - 90 shot N2O and 175k on the clock

July 14th, 2007, 06:20 PM	#10
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	i noticed that the stang (which is now mine) has both valve cover gaskets leaking could that cause lower oil pressure? __________________ 85 svo. work in progress

July 13th, 2007, 03:36 AM	#4
Rustbelt Regular Join Date: Mar 2007 Posts: 245 iTrader: 0 reviews	my old one was in the middle. the one i replaced it with is only reading at 1/3. they are not accurate at all.

July 13th, 2007, 12:08 PM	#6
ThrashN Regular 91 LX 5.0 11.87 Join Date: Jul 2007 Location: Waynesboro, PA Posts: 99 iTrader: 0 reviews	I have over 200,000 miles on my car and the oil pressure runs about 20 at idle and 40 when driving

July 13th, 2007, 12:17 PM	#7
woody1 Enthusiast Join Date: Nov 2006 Posts: 559 iTrader: 0 reviews	those stock gauges are useless, I would certainly not base my decision on that gauge

July 13th, 2007, 12:48 PM	#8
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	yeah, it is worth the money to buy a mechanical gauge. At least buy a new sending unit before worrying about the pressure. My stock gauge reads on the second bar above red, but the mechanical gauge reads 45 psi.

July 15th, 2007, 03:39 AM	#12
tording92lxnotch Regular Join Date: Apr 2007 Posts: 165 iTrader: 0 reviews	No. Assuming you keep enough oil in the oil pan even if its leaking out of the valve covers that will not lower your oil pressure. Once the oil reaches the top of the heads it is no longer pressurized. It is pressurized as it is forced through your bearings and the bottm of the motor. To get to the top of the head the oil comes up out of the pushrods to lube the rockers then runs back down through passages in the heads into the oil pan. So since the oil just runs back into the heads and oil pan at this point it is not pressurized, therefore if it leaks out of the valve cover instead of going back into the oil pan you will not lose pressure. The only way you would lose pressure is if so much leaks out that your oil pan starts to run dry and your oil pump can no longer pump any oil, then your pressure will drop. __________________ 92 notch--Shorty headers--Pro 5.0--3G alt--U/D pullies--A/C delete--190 LPH Walbro FP--Compucar N2O kit--FMS alum D/S--Taurus fan--Weld Draglites--Mallory 685 ign Box--dccontrol fan controller 13.0 - 108 mph - 1.9 60' - 90 shot N2O and 175k on the clock

July 15th, 2007, 10:04 PM	#13
terribleonexx88 Enthusiast Join Date: Oct 2006 Location: new england Posts: 822 iTrader: 0 reviews	its not low on oil so maybe its just the gauge __________________ 85 svo. work in progress

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oil press.

oil press.

Re: oil press.

oil press.