Mud in Radiator - Overheating!

Wouldnt recommend getting the jet washer anywhere near the rad, I unintentially made that mistake and flattened half the ali fins in the rad effectively blocking it.

Muds a pain but kinda unavoidable if you go to the pay & play sites. I find it's not really the clumps of mud just the silt stirred up with vehicles constantly going through the water. It just dries on and hard to get off and really buggers the effectiveness of a small rad.

I found the best thing is a good spray with muc off stuff and then use a low pressure 12v pressure washer and loads of water through the rad fins before heading off to the road. It's a pain but I never found a proention. I don't tend to go to the P@P sites anymore but do occasionally do some more full on laning, often going through quite deep water and none of us have ever had a problem.

Someone once told me they kept a rad just for doing the P@P sites and just kept swapping, bit of work but not a bad idea, probably wouldn't take any longer than trying to give the rad a good clean in situ.

I mean never had a problem with mud in deep water, I should mention everyone has snorkels and breather pipes to diffs, box and tbox, otherwise yup deep water is a bad idea.