(this thread is over 4 years old)Check your rad. There are Chinese copies doing the rounds that don't have a baffle in them. Island 4x4 said they've seen loads without baffles. I had one (not from them) fitted and it didn't have a baffle. Simple test with a £12 usb endoscope or take the rad out and do the marble test.
I have videos if you want to see the problem.
Apologies if you've already checked...
Nik
P.S. If I was right, how do I claim my free lager?![]()