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Oil Pressure Gauge

  • Thread starter Thread starter Guero
  • Start date Start date May 27, 2006
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Guero

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Oct 11, 2005
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#1
  • May 27, 2006
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it goes down at idle then back up to normal when i sart driving???? whats up with that? it never did it before
 

illwood

Member
Apr 3, 2004
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Worcester, MA
May 27, 2006
#2
  • May 27, 2006
  • #2
Is this the factory oil pressure gauge?

'Cause you can't go by that. It's effectively just a dummy light with a needle attached to it.
 

The Green GT

No 13 year olds are safe around me.
10 Year Member
Jan 8, 2006
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May 27, 2006
#3
  • May 27, 2006
  • #3
Yea, the factory one is just a dummy light. But a real press gauge would do what you are describing.
 

Guero

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  • May 27, 2006
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ok is it hard to instll an after market one?
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
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#5
  • May 27, 2006
  • #5
Very easy.
 

Guero

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  • May 27, 2006
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what would i need to buy, i know a gauge but do i tap into the oil or what???? hey hissin im heading over to tucson next weekend.
 

illwood

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Apr 3, 2004
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May 27, 2006
#7
  • May 27, 2006
  • #7
Guero said:
what would i need to buy, i know a gauge but do i tap into the oil or what???? hey hissin im heading over to tucson next weekend.
Click to expand...
There's a thread I saw recently about keeping the factory needle working while running an aftermarket gauge. You basically put a T fitting into the block and then hook the two sending units up to it.
 

Guero

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#8
  • May 27, 2006
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can i just cut into the gauge from the stock one?
 

HISSIN50

"How long does it take to get help in here?
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#9
  • May 27, 2006
  • #9
Search Ernan's threads. He had the write up and posted part numbers and I later went back and transcribed the part numbers in pipe sizes in case people go to Lowes to get brass from the plumbing section.

Guero, you want to keep both gauges independant of eachother. If you dont care about the stock gauge, it is a really easy install.

And keep me informed about Tucson - we should meet up.
 

Guero

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kool, i dont care bout the stock one. how would i go from there?
 

HISSIN50

"How long does it take to get help in here?
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#11
  • May 27, 2006
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Guero said:
kool, i dont care bout the stock one. how would i go from there?
Click to expand...
get your new gauge. The sender fitting will likely be 1/8" NPT thread and the stocker is 1/4" NPT. The new gauge might have an adapter - if it doesnt go to the parts store or home store and get a 1/4" Male NPT x 1/8" female NPT adapter.

Unscrew the stock sender and install the adapter (use sealant on the threads). Then screw in the electrical sender or the compression fitting (for a mech gauge). Very very simple.

If you get a mech gauge, I would use copper or braided line. I doubt the nylon line would hold up for you Guero.

Good luck.
 

OrangeMustangGt

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Mar 7, 2002
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May 27, 2006
#12
  • May 27, 2006
  • #12
yeah, i agree with hissin, BUT i say stay with the electrical gauge, i mean who wants potentially 300deg oil spraying on your legs?...never can be too safe with that. Also, you should keep your stock gauge working, it will look stupid having a non-working gauge in your cluster, imo.....ALso you will find its quite tight in there assuming you have a/c still, i reccomend that you can get some say 5/16 brake line and extend it out with some bends, and fittings so you can gain access.
 

BlackVert

15 Year Member
Oct 3, 2003
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May 27, 2006
#13
  • May 27, 2006
  • #13
you better double check your oil manamgment. that might be an indication of a problem that is related to the knocbing sound you were talking about in your other thread.
 

Guero

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#14
  • May 28, 2006
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BlackVert said:
you better double check your oil manamgment. that might be an indication of a problem that is related to the knocbing sound you were talking about in your other thread.
Click to expand...
what do i look for???? btw, so the tock oil pressure has no function whatsoever? it just gos up as soon as it starts.
 

1slow95

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#15
  • May 28, 2006
  • #15
Guero said:
what do i look for???? btw, so the tock oil pressure has no function whatsoever? it just gos up as soon as it starts.
Click to expand...

Mine works like a normal oil pressure guage

I don't know how accurate it is tho.
 

BlackVert

15 Year Member
Oct 3, 2003
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May 28, 2006
#16
  • May 28, 2006
  • #16
i don't know exactly what to tell you to look for, all i know is that a lack of oil can cause the lifters to not expand, which can cause a clacking noise similar to what you were talking about in your other thread.

i'm just worried that they might be related ...
 

Guero

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Oct 11, 2005
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#17
  • May 28, 2006
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ok ill check that. maybe ill change the oil. maybe its low who knows!!!!!!!!!
 

Guero

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#18
  • May 28, 2006
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ok my lazy ass got up and checked the dipstick, its low but only like 1/4 of a quart.
 

illwood

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Worcester, MA
May 28, 2006
#19
  • May 28, 2006
  • #19
Low-5.0 said:
Mine works like a normal oil pressure guage

I don't know how accurate it is tho.
Click to expand...
Actually I doesn't really. The factory sending unit is really an oil pressure switch. More than 5 psi is "on" and less than 5 psi is "off."

In order to get the needle to move to somewhere in the middle of the range, there is a resistor on the back of the gauge cluster.

So we end up having the false belief that we have an oil pressure gauge in our cars when it's really a dummy light with a needle on it.
 

1slow95

Founding Member
May 16, 2002
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#20
  • May 28, 2006
  • #20
illwood said:
Actually I doesn't really. The factory sending unit is really an oil pressure switch. More than 5 psi is "on" and less than 5 psi is "off."

In order to get the needle to move to somewhere in the middle of the range, there is a resistor on the back of the gauge cluster.

So we end up having the false belief that we have an oil pressure gauge in our cars when it's really a dummy light with a needle on it.
Click to expand...

Stock engine - The needle stayed in the middle of the guage and rarely moved. It would fluctuate every now and then.

New engine - The needle is far to the right of the guage. Also, when priming the engine for it's first start, the needle went up slowly like it was reading actual pressure.



I did install a new sending unit with the new engine... It's supposed to be a factory replacement from Advance Auto.
 
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