MarcB
ClioSport Club Member
		  
								
								182 Trophy & 197 F1
								
							
						
						
	
						
					
					
						
	
					
				
				They can be helicoiled, but it's not always permenant. A timesert is however.
a lot of piston chamber pressure and a weaker than usual head plug thread. when you consider how much pressure actually takes place in the chamber, you do have to wonder how any of them stay in...
No updates?
It's been broken for parts.
Good work. What sort of cost did you have in the end? Thinking about replacing my leads and plugs.