No Air Filter - What sort of damage?

[cespenar]

Well I just replaced my piece of crap HKS air intake (came with the car when it was imported 3 years ago as previous owner stated) with an Apexi Power Intake system, and I discovered that the HKS sponge had all bunched up underneath where you couldn't see and had left a big hole where unfiltered air could get into the engine. So just wndering what sort of damage, if any, would I be looking at? It's a 2JZ-GE Supra and it still runs fine, and I assume that after 3 years of HKS damage if anything were to break it would have done so already, but I don't know if there would be any built up deposits of whatever on the inside or not, and what the best way to clean it out would be. Cheers.

[Dell'Orto]

If you've done regular oil changes, it probably wont have done too much. You're lucky its not a GTE, as those shithouse filters dust the compressor wheels

[Santa'sBoostinSleigh]

does it seem to burn oil?
your piston rings or the bore may have been worn from sucking in dust

[cespenar]

It has been regularly serviced and doesn't seem to burn oil, doesn't blow smoke either *breathes sigh of relief* so I should be OK then, thanks guys. Seems criminal how such poor air filters are allowed to be sold