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oil pressure switch

 
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Old 03-23-2013, 02:02 AM
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oil pressure switch

The other day my lude started dripping oil onto the ground when its never done that before. So the first chance I had I got under it to pinpoint the leak. What I saw was that the oil pressure switch (under the oil filter) was building a drip. Could the part it screws into be possibly cracked? If so what is that part called?
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Old 03-23-2013, 03:30 AM
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Re: oil pressure switch

Oil pressure sending unit.
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Old 03-23-2013, 10:16 AM
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Re: oil pressure switch

The part it screws into is the engine block, so you don't want that to be cracked! More likely it's a gasket or O-ring gone bad; just replace the sending unit if that's the case. First, though look carefully at the oil filter, to make sure it's not leaking past its gasket, and the part the filter screws onto. That's the oil cooler, and the O-ring that seals the cooler to the block frequently goes bad with age...you may just see oil coming from above, pooling around the sender unit. If it's the oil cooler O-ring, you should be able to get a replacement O-ring from the dealer.
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Old 03-23-2013, 10:19 AM
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Re: oil pressure switch

this thread really helped me figure out that my oil cooler o ring was bad, and really helps find the source of many different oil leaks.

The Official Oil Leak Guide - Honda Prelude Forum : Honda Prelude Forums
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Old 03-23-2013, 08:31 PM
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Re: oil pressure switch

At first i thought it was the oil cooler o-ring, I had searched on it for a while. But mine doesn't have the oil cooler o-ring when I replaced the filter i looked for the 30mm nut and there isn't even a place for one(assuming because its an h23). I cleaned the whole area off and started it to see exactly where it was coming from and it was pooling at that sensor no where else. Thanks for the help as well!
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Old 03-23-2013, 08:42 PM
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Re: oil pressure switch

The part it screws into that I was saying is part number 2 in the picture
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Old 03-23-2013, 09:24 PM
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Re: oil pressure switch

Could it be part 51 or 33 are the culprit?

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Old 03-23-2013, 11:04 PM
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Re: oil pressure switch

If I'm not mistaken 53 is just a screw that holds the wire to the sensor. Does anyone know if there should be a gap in between parts 31 and 2? or should they be sitting flush to each other? Thanks for the rep I use forums for my jeep as well so I know how bad it is when people don't do any searching and ask something covered a MILLION times haha
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Old 03-24-2013, 12:18 AM
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Re: oil pressure switch

Something's not right. The oil cooler should definitely have an O-ring -- not only does it show up in manual and the parts catalog (I pulled this from Majestic Honda), but I've seen it when removing mine. If there's no O-ring, there's your leak.

I'm having trouble matching up your picture with the engine -- where did the picture come from? What are parts 2, 31, and 33 identified as? I've spent plenty of time staring at that part of the car during oil changes, and it's always looked to me like the oil sender (on an H23A) screws directly into the block...if it doesn't, then what's in between is on their really tight.

More detail, if you have it...we may be looking at different things.
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Last edited by Jamie; 03-24-2013 at 12:21 AM.
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Old 06-11-2013, 03:55 PM
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Re: oil pressure switch

I thought I had fixed the leak by replacing the oil pan gasket until today when it decided it was going to leak some more and create a cloud of smoke. My question is my oil filter screws directly to my block and there isn't a oil cooler in between. Should there be? h23a1 auto trans.
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Old 06-12-2013, 12:22 PM
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Re: oil pressure switch

I have checked my vc, cam seals, dizzy o-ring, oil pressure switch, filter is tight, and i just looked under a buddy's h23 and it doesn't have the cooler either so that cant be it. I've spent so much time searching for it I'm about to go spend the $50 and have Honda do it if i don't get any other ideas.
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Old 06-12-2013, 02:37 PM
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Re: oil pressure switch

I'm stumped, then...have never seen an H23 without an oil cooler under the filter.
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Old 06-12-2013, 09:47 PM
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Re: oil pressure switch

I'm beyond confused as well, I just want my damned lude to be able to run right again! Here is a pic of the filter and sensor showing it goes straight to the block
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