Are tgv valves a Subaru thing or do other motors have them? Just thinking for if they were a bit clueless to it, but great if not. I've been doing a bit of reading up to see if I could locate them myself an spray them myself, but probably ended cocking something up, i take it their is holes to get into in their then, does it just need a light coating or a blasting out? Just so I know to tell them incase it does damage. Failing that do you think I should take it somewhere who's more scoob minded?