Hi all - am in the middle of a rebuild at the moment (aided by someone much more experienced than me thankfully!). The heater pipe that goes all the way through the manifold itself (appears to be part no. 90611532) is rusted through in many places, but is good and stuck where it comes out of the manifold and won't budge. I've tried heat, mole grips, you name it. From the photo on Rimmer Bros, it appears to be a 'normal' thread, but maybe they've threadlocked it or bonded it as well in some way - couldn't find any suggestions on how to get it out but appreciate may just be crap at searching. Any suggestions? The guy helping me says not to worry about it but I'd love to swap it out if there's a way to do it without trashing the manifold!