Originally Posted by jon@work
Originally Posted by ian sibbert
it will ... not prevent head gasket failure IMO, we have modifications to the head to prevent that.....
how so Ian ?
In the past YB's suffered with 'kettling' (the cooling water boiling around the combustion chamber) in the head, basically heatsoak or whatever you want to call it from the combustion chamber to the water jacket in the head, to prevent 'kettleing' we run three bleed off's from each head core plug to the header tank, this improves circulation in the head and prevents 'kettling'. It is a recognised mod on the grp'a' and WRC engine, on our engine I have 3 seperate -3 lines but there is an actual 909 3 way connector which provides a point where the 3 come together then go to the header tank in 1 12mm hose lol if that makes sense....
The 909 3 - 1
We have 3 individual lines going to the header tank...
Ian