Alright guys and gals. Last Friday, I installed an Aluminum oil pan, new pick-up tube, and oil filter adapter on my Riv. This was/is an easy oil pan upgrade IMO. The pan, pick-up tube, and adapter are all off of a 2000-2005 Pontiac Bonneville. It doesn't matter if it's supercharged or not. I ordered all 3 parts from Morad shipped to my door for $90.
The reason the oil pick-up tube had to be replaced is because on the Bonne oil pan, the windage tray is built in to the pan and in a different location than the Riv. Same goes for the filter adapter. I tried putting just the pan on at first, but the factory Riv filter location made the filter hit the pan, and couldn't even be threaded on.
There was only one small modification that I had to do, which I totally forgot to take a picture of (I was in a hurry). There was a casting lump above the upper right bolt location on the filter adapter that I needed to grind off. It hit the Power Steering Pump otherwise. Other than that, it all bolted right on.
Here are the new parts. Notice the pan uses a thick reinforced rubber gasket. These are only available on a factory pan. If you order a new pan from a dealer, it will not come with the gasket groove, and you will have to use GMS (RTV). You cannot order the pick-up tube or oil filter adapter new...they are discontinued from GM.
Oil pan off.....One thing you may find when removing the factory pan, is that it won't simply come down. The stock gasket is made of thick plastic, and also serves as the windage tray. It very well may stuck to the pan like mine was. You'll have to free it from the pan itself. I used a long 90* pick to break it free. After you get the pan off, the two 8mm pick-up tube bolts need to be removed to get the factory gasket off.
It's also a bit tricky to remove all four 13mm bolts that hold the filter adapter in place. The axle, the trans, and the sway bar make it tricky, but you can do it with a 3/8 ratchet, short 13mm socket, and a 6" extension which you'll use for the upper bolts. I also had to unplug the transmission output sensor, and the oil pressure switch which is mounted in the adapter (which needs to be transferred to the new adapter). Also, I know it's tricky to see, but in the below pic, you can see a little steel "cup" sticking out of the engine block where the adapter bolts to. There's a spring behind that cup. That's the oil pressure relief "valve". Careful not to drop them on the floor, as it will roll away. I had to install the new adapter with what seemed like 3 hands lol. I had to hold the new gasket in place (with all 4 bolts in the holes), and try and push that valve in enough to get the bolts started. Once 1 of the bolts was started, I was able to "walk in" the adapter little by little, corner by corner evenly, until it was touching the block. You don't want to tighten one corner at a time, otherwise you'll jam up that relief cup and probably break it.
Once the adapter is on, oil pressure switch installed (with new thread tape), and the trans output sensor plugged back in, installing the new pick-up tube and pan is the easy part. You can go ahead and bolt the new pick-up tube into place, then bolt the pan up. Last thing installed should be the Oil Level Switch. It looks like this when completed...All of the plastic shields fit back into place without any modifications.
Notice how the new oil filter adapter moves and angles the filter away from the pan. I also like how it seems more shielded behind the pan.
Don't forget to get new gaskets for all 3 parts. I think I spent a total of around $130 for the whole set-up.
You will also gain a 1/2 quart of oil capacity by installing this pan. Where the factory Riv pan is angled to fit the oil filter, the new pan is square, adding oil capacity. Not sure what else to write, as there is already a write-up on changing the gasket.