Just wondering if anybody had tips on cleaning the engine fan on a type 4 engine? Without pulling the whole engine out, what would be the best way. Last time I tried to clean it I used degreaser - and of course no matter how careful I was, it got onto the fanbelt and it started slipping. Then I had to spend hours trying to get the degreaser off the fanbelt so it wouldn't slip! The fan is covered in gunk and what looks like caked on oil. I'm sure it's not sucking in as much air as it could.