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Old 09-29-2011, 12:40 AM   #1
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Question wrangler yj oil pressure sending unit leaking

hey im a newbie even though i read post from the site day and night. gotta little issue. i have a 94 wrangler 5speed 2.5ltr. the other day i was driving and smelt oil leaking or burning. i pulled into the gas station to check the situation and comin to find out my oil pressure sending unit is leaking oil every where in the engine bay. the unit is located next the distributor. there's a yellow wire at the top of the unit. around that wire is a blue rubber boot that seals off the wire going into the sending unit. i pushed the seal back into the plastic clip(thinkin it just came loose) and had a friend fire up the jeep as i watched the sending unit to see if it would leak, well sure enough as soon the engine started and came to idle , that seal pushed up and made a pin line stream of oil clearly an issue of oil pressure pushing the boot up causing a leak. my question is why is this happening? the sending seems to be 2 pieces, the top(plastic) where the wire leads in the boot, then down further a metal housing that threads into the block. which one of these possibly need replaced or both any feed back would be freakin awesome

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Old 09-29-2011, 12:43 AM   #2

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Old 09-29-2011, 06:33 AM   #3
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The plastic and metal are one unit. The sending unit definitely needs to be replaced. They usually cost around $30. Easy to change, just screw the old out and the new in. the rubber boot on the connector is just to keep water and dirt out of the connection, not to keep oil in.
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Old 09-29-2011, 07:11 AM   #4

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Not for nothing, but I've always put teflon tape on a sending unit before I screwed it back in... I could be wrong, though....
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Old 09-29-2011, 03:06 PM   #5
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thanks you all for the feedback, im goin to autozone now to pick one up
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