I take mine muddin pretty regularly noww, I bought some engine degreaser, got it spotless with the pressure washer, and I then sprayed with an engine protector. It is like an enamel for high temp areas at autozone, you spray it, wait, get it hot for 15 minutes, then its much easier to clean. I have had no problems pressure washing, just careful of coil packs, and the headlights, water got in my passenger side through the hole for the HID plug. My bad. But I have had no problems now that I put the protector on it.