First off. . the previous owner let this car sit for 15 years, last 6 months was outside. . . I found a lot of rubber and plastic body parts chewed through. . things like the brake fluid reservoir, the steering boots, engine relay board cover. . .
When I pulled the engine apart, I was puzzled when I found all this fabric on top the engine under the shroud. . . first thought was the PO started the engine and it sucked in some rags. . then I saw all the rat turds and looked closer at the fabric. .
It was from one of those breathable car covers. . those little critters had built a regular rat hotel on top the engine.
Asked the PO about his car cover and had it been mysteriously missing small pieces. . . he said he couldn't figure out what was tearing it up and eating it.. fortunately it didn't get driven like this. .