intake mainfold

I'm wondering if anything is catastrophically wrong with this, recent high-mileage oil change, wondering why its oily here. Let me know if I left anything out.

I have a 3800 Gen 1 with an aluminum upper intake. I cannot find a gasket anywhere online. The rubber one they send doesn’t have anywhere to seat into lower intake. Here are the pictures. Any help would be great appreciated. Do I need to just use RTV gasket maker and go from there?

I recently had to replace a couple of ignition coils and spark plugs in Cylinders 3 & 5 to fix I misfire I had. The coils for 3 & 5 are only accessible by taking off the intake manifold. Putting everything back together took a while because I snapped the PCV line (don’t know why these are...

I'm aware that most 3800s Series II (L36) have warping issues on the upper intake manifold. A TSB was published in 2003/2004 identifying this problem. There were a few threads here and there asking this question, but they're old. I was wondering if someone had updated info. In addition to the...

I replaced a starter, upper intake manifold, and pulled plugs to eject coolant on my 2004 Buick leSabre, which unceremoniously died on me the other day due to the mix of coolant and oil in the upper intake manifold. Flywheel spins fine, starter is brand new and replaced, no leaks at gasket after...