did you take the allen bolt out for the hard coolant pipe when fitting the tip?
when i removed the allen bolt for the hard coolant pipe i pulled the pipe out the way a bit and fitted the bolt without it bolting the pipe to the engine i found this held the coolant pipe off the tip.
when i removed the allen bolt for the hard coolant pipe i pulled the pipe out the way a bit and fitted the bolt without it bolting the pipe to the engine i found this held the coolant pipe off the tip.