Oil pressure sender switch leaking

Just replaced my oil pressure sending switch as it was leaking oil out the electrical connector. It had been leaking slowly for a while, but suddenly go to the point where there was a noticeable
drip while the engine was running.
I always thought oil pressure switches were a sealed electrical pressure transducer and couldn't leak.
Funny, the oil gauge still showed good oil pressure.
1990 Olds Silhouette 3.1L engine. 105,000 miles
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They're a fairly common leak source... some are real bears to get to and replace. There is a pretty good variety of special tools for dealing with them...
Erik
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Yep, they'll leak. Had a '68 Camaro with one that shot out oil like a fire hose, once. You would think they would have gotten better after almost 30 years ...!
-= Larry A.

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Peter wrote:

They leak when the seals fail internally. A pretty common problem.
John
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