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Unread 12-17-2006, 03:35 PM   #1
dwilliamsceg
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1997 TJ Wrangler 
 
Join Date: Feb 2006
Posts: 503
Need Immediate Technical Advice - Low Oil

Hey guys and gals,

I potentially have a great deal on a 2000 XJ but it has one technical issue that has me contemplating the buy.

After about 10 minutes, the oil pressure gauge drops to zero. The seller has replaced the oil pump and the oil pressure sensor switch. The Jeep runs great with no knocking, pinging (other than valve tick), and is in generally great conditions. So, my questions are:

1. Is this a common error for this year? If so, what is the fix?
2. Is there a pressure sensor probe (like for cooland temp) that senses the oil pressure? If so, could this have gone bad?
3. Could the gauge itself be bad?


The seller is willing to let me take it home for a day or so to test drive it for the weekend. If the Jeep is truly getting zero oil pressure, would it not seize after a few minutes of running?

Any advice is much appreciated!!!

Dave.

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Unread 12-17-2006, 04:20 PM   #2
AZ Jeff
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2014 JK Wrangler 
 
Join Date: Sep 2005
Location: San Tan Valley Arizona, AZ
Posts: 7,452
If the seller has done what he claims, and the hot idle oil pressure is showing "0", then it's time to temporarily install a mechanical guage on the engine, and get a reading on the REAL oil pressure.

If it's as low as the electric guage says it is, then the problem is probably loose bearing clearances, and, at a minimum, a new bearing set will be needed.
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1992 XJ -- stock (RIP)
2000 XJ -- lots of basic mods. Sold to fellow forum member. I miss it.
2014 JK -- the project is just starting!
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Unread 12-17-2006, 04:25 PM   #3
dwilliamsceg
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Posts: 503
Thanks Jeff.

1. Where can I buy/use a mechanical oil pressure gauge?
2. Where do I hook up the gauge?

Thanks! Dave.
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Unread 12-17-2006, 04:26 PM   #4
creature
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2001 XJ Cherokee 
 
Join Date: Jan 2005
Location: Morgantown WV
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The jeep wouldn't likely sieze after a few minutes with zero oil pressure, I have heard stories of these engines going as far as 200 miles with no oil
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Unread 12-17-2006, 05:50 PM   #5
Jeff in PA
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Quote:
Originally Posted by dwilliamsceg
Thanks Jeff.

1. Where can I buy/use a mechanical oil pressure gauge?
2. Where do I hook up the gauge?

Thanks! Dave.
You'll be able to get a mechanical oil pressure guage at your local auto parts store. Auto Zone, NAPA, Pep Boys, Western Auto etc.

Jeff
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Unread 12-17-2006, 07:04 PM   #6
AZ Jeff
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2014 JK Wrangler 
 
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Location: San Tan Valley Arizona, AZ
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Quote:
Originally Posted by Jeff in PA
You'll be able to get a mechanical oil pressure guage at your local auto parts store. Auto Zone, NAPA, Pep Boys, Western Auto etc.

Jeff
And you hook it up by threading the end of the tubing into the same hole where the electric pressure sender would screw in.
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1992 XJ -- stock (RIP)
2000 XJ -- lots of basic mods. Sold to fellow forum member. I miss it.
2014 JK -- the project is just starting!
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