Power Wahser to Clean Rear Radiator

All radiator fins are NOT created equal. If you have an older coach, where the fins could have already corroded to the fragile state, then even a moderate amount of water pressure can damage them. If you have a newer coach, then careful use of a pressure washer may be fine. Just use the spray head with a WIDE pattern that spreads the pressure over a larger area. The best thing is to inspect your radiator first to try to determine the condition of the fins. If you have spent a lot of time in the salt belt there is a good chance that your aluminum fins may be on their last legs.