hiya guys am just after a point in the right direction, have just put my 2.9 vr lump in my mk3 and all is connected up, runs and idle is spot on, put sounds very knocky, thought this may have been down to the point the that the head was port and polished, so all was bone dry wen it went together left it to idle for a time and has got quieter but don't want to keep running it up if it is going to do long term damage, water is flowing fine tho bottom hose is getting warm but not as hot as top, thought i would add that point don't know if it makes a diff, tho do keep removing cap to release the a