I've been using semi-synthetic 505.01 5w40 in my 2006 Jetta TDI BRM for 14 years. I am now finding that I cannot find Motul specific 505.01 that I've been using. They now have 8100 fully synthetic and I see a similar Liqui-moly semi-synthetic 505.01. I prefer 5w40 for its additional...
So I have no coolant coming out of the back of the cylinder head.. seems plugged. No coolant coming from return to the Reservoir, just spits water barely. blown head gasket?