|
How many miles are you at? Sometimes the oil pump pickup gaskets need to be replaced… I’m not sure if an exhaust would get THAT restrictive, that it would work against the engine that much. Even in that case, it would mean that the oil pressure would raise/increase, no decrease, no..?
If you want to check the exhaust system flow/operation, you can pull the fuse on the NPP exhaust system, which will leave the valves fully open. At that point, it should be a fully flowing catback exhaust system. I would probably start checking other things regarding engine oil pressure, as it could be something internal (ex: oil bypass valve, “dog bone”)…
I have a leaking oil pan gasket, and I’m currently at around ~48k miles right now. I plan on re-using the stock oil pump, but I will be getting rid of the factory plastic/composite(?) oil bypass “dog bone” valve, and then installing a billet one, with fresh new o-rings. Same thing goes with replacing the oil pump pickup tube o-rings, since they can degrade over time I will also be installing a pickup tube brace as well, while I’m in there..
People also say to avoid running a high pressure engine oil pump, if you’re running a “basic” NA engine setup. I would also trust my stock, factory OEM oil pump, rather than some random one. I do, however, trust most Melling engine oil pumps for GM LS V8 engines though.
|