Rod knock, no metal in oil or oil pressure warning
Hi everyone. Hoping to get some input and insights from those smarter than me. The car is an 06 Exige (naturally aspirated) with 30k miles, mostly track days plus to-and-from transit. Has a baffled oil pan. A few months ago at Thunderhill, during the second lap of first session of the day, I felt something off with the car, not a lack of power but a change in sound maybe. Can’t really explain it better than that. I come in and it’s making an awful sound. I’ve never experienced any bottom end issues with any car, but it sounds like it’s coming from that area. No dash warning lights, but not sure if that matters. Tow it home and it’s sat since then until I finally drain the oil this weekend to get a sense of the damage. Turns out there’s no metal in the oil, which is confusing. I now plan to pull the oil filter (forgot to do that after being surprised by the lack of metal bits in the oil), inspect that and also send an oil sample to Blackstone. After that, I’ll drop the pan and even do a compression test.
In the meantime, anyone have any ideas as to what I’m experiencing? It sounded catastrophic but the lack of metal in the oil pan has me wondering what’s really going on here. Any insights would be greatly appreciated.