i recently flushed my rad system as it had been running on no coolant or water, just sludge. i used the stuff that comes in the small blue bottle an u get stage one and two. can't remember what it's called tho.. but it worked a treat! if it hasn't been done in a while then i'd say do it!
I'll see if i can find the make of it.
I'll see if i can find the make of it.