I have a 2000 catera that is leaking oil in several places on the bottom. Found one area were a metal tubing should be around the oil filter that has been spliced, clamped, and replaced with high-pressure rubber tubing. What is this part and how can I get it to fix it correctly?
Automobile(s): Platinum 2001 Cadillac Catera Sport
Re: Leaking oil
Without a picture this can only be a guess but it sounds like the internal oil cooler has been bypassed. Normally 2 metal oil lines run between the place you describe by the oil filter to the cover plate under the intake plenum on top of the engine. The oil cooler lives under that plate and is known to leak oil into the coolant gallery between the cylinder heads. That oil/coolant mix gums up the engine bad sometimes leading to burnt crankshaft and camshaft bearings among other things.
The real fix is to replace the oil cooler and the now mangled oil lines. If you decide the bypass is good enough and doesn't cause your engine to overheat you'll have to create a better way to connect the in/out by the oil cooler. I don't recommend it but it's up to you.
My father inlaw has done the oil cooler bypass on all 4 of our Cateras. When it fail its just to expensive for new so he does the bypass since we don't really need it that much down here. On my current one we haven't done it yet as the engine was swapped in last year with cooler still in tact but when it fails we'll be doin it again. Never had overheating problems.