Replaced rear valve cover gasket on my 98 ssei, but I still have a leak and low oil pressure that falls into red after a few miles, especially in the afternoon when it's warmer.

I had been putting off the gasket repair until I had the time, feeling really discouraged that the problem hasn't gone away.

Any ideas on how I can find this leak?

You guys have always helped me out with my ssei for over 10 years, I just want to say thanks!

The oil pressure senders are known to go bad. You may want to start there for the pressure.

For the leak, you're going to have to clean everything up really well with brake clean and see where the leak is coming from.

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95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy (RIP)
02 Jag X-type
03 BMW M5
05 Chevy Cobalt LS
07 Infiniti G35s 6MT (Sold)
07 Ducati Monster S2R 800 with DS1000 swap
83 Yamaha IT175K
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.

It looks like the leak is coming directly from the pressure sensor. Can anyone tell me if there is only one of these things on the ssei, or are there more?

All 3800s have one as far as I know.

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95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy (RIP)
02 Jag X-type
03 BMW M5
05 Chevy Cobalt LS
07 Infiniti G35s 6MT (Sold)
07 Ducati Monster S2R 800 with DS1000 swap
83 Yamaha IT175K
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.

Only one and if i reminder correctly located at the oil filter adapter

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Dr. Camaro

Instagram: @Firebirds_and_Camaros_Hub
YouTube Channel: Firebirds and Camaro Hub

The replacement sender I installed failed after 5 months! The leak is so bad I can't drive it. Can the sender screw hole be plugged until I can get parts? I have a plug that will fit the hole, and I know the gauge wouldn't register, but will the car still turn on?

You should be fine.

_________________

95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy (RIP)
02 Jag X-type
03 BMW M5
05 Chevy Cobalt LS
07 Infiniti G35s 6MT (Sold)
07 Ducati Monster S2R 800 with DS1000 swap
83 Yamaha IT175K
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.

I had a similar problem, and it would not go away until i installed a OE Pontiac sending unit.