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Old 05-26-2010, 07:13 PM   #1
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Oil pressure sender location on an 8.1?

Hello Everyone,

My Name is Bob and this is my first post to this forum. I have a 2007 Fleetwood Terra LX motorhome on a 2006 W20 workhorse chassis with the 8.1 big block.

I am having a problem with a false low oil pressure warning. It has been suggested to check the connection on the sending unit, my problem is I am unable to find the sending unit.

I have a 1967 Corvette with a 427 big block and the oil pressure line for the mechanical guage is on the left side of the motor above the oil filter. I looked on the 8.1 and it is not there. Any help with finding it is greatly appreciated.

Thanks.

Bob
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Old 05-26-2010, 09:25 PM   #2
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Quote:
Originally Posted by doubleB View Post
Any help with finding it is greatly appreciated.
Bob, Remove the doghouse. The Oil Pressure Sensor is located on top of the engine block and to the rear of the engine. Look just forward of the bellhousing. Slightly left of center looking from the rear to the front.

Note:
23. Apply sealant GM P/N 12346004 or equivalent to the threads of the oil pressure sensor.
24. Install the oil pressure sensor.
Tighten
Using the J 41712, tighten the oil pressure sensor to 30 Nm (22 lb ft).
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Old 05-27-2010, 07:33 AM   #3
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Bob;

Welcome to iRV2. We are glad you joined us. If you have not already done so I would like to encourage you to go up to the New Member Check In and introduce your self so more of our members get to know you.

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Old 05-27-2010, 09:28 AM   #4
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Make sure that you are not using a Fram oil filter. It can cause a low oil pressure warning at higher RPMs.
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Old 05-27-2010, 05:13 PM   #5
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How can a Fram oil filter cause low oil presure? I just installed one yesterday.

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Old 05-27-2010, 06:21 PM   #6
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search this forum for 8.1 OIL PRESSURE and you will find out how.
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Old 05-27-2010, 06:42 PM   #7
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DriVer,
Thanks for the info, that is just what I was looking for.

Petro,
Thanks for the welcome. I looked to see how to do the New Member Check In but I cannot find how to do it. Any Hints?

JCM,
I am not a fan of Fram filters, I use the GM OE filter AC Delco PF454 and 5w30 Mobil1 synthetic oil althought since the coach is out of warranty and the Napa/Wix filters are highly rated I might switch.

dagray,
This is a personal opinion but I have cut open a Fram filter and an AC Delco filter both filters were for the 8.1 and the Fram is inferior. The filter media end panels were made of cardboard and the bypass plate on the inner end was cheaply made. Here is a link from this forum that talks about the low oil pressure at high RPM caused by Fram filters

8.1 oil pressure

Thanks everyone. I think I am going to like this forum.
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Old 05-28-2010, 04:41 PM   #8
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DriVer, Thanks for the info, that is just what I was looking for.
doubleB, You're welcome sir!
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Old 05-29-2010, 08:41 PM   #9
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Here is an update.
I removed the doghouse cover and checked the connector on the oil pressure sender and it was loose. I pushed it back on till it locked and no more false warnings.
I still might put in a mechanical oil pressure guage.

DriVer, again, thanks for the info.

Bob
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Old 05-29-2010, 08:47 PM   #10
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DriVer, again, thanks for the info.
Bob, Anytime!
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