Originally Posted by 
PLR
				
			 
			G`day ,
 
if you have a 2lb hammer or mash hammer with any weight and if you don`t have anything else use a half inch extension bar of the right length .
 
You can see the top one from above not easy but its there , you can see the bottom from below , both cases move yourself around till you can sight them . 
 
Use the bar as a drift and belt the allen head square on hard a few times then use a lighter hammer and hit it sharply . Hard is using the weight for solid impact and sharply is springing for light impact . Make sure the heads are hit square so`s not to damage and make sure it`s the head . Then clean out the head of the key to be sure the allen tool sits home . If the head is distorted use you impact screwdriver bit backwards to reshape the inside of the allen bolt head .
 
Fit your new tool with a hammer to be sure it`s home , apply as much pressure as you can but it must all be square .
 
I have a allen socket and extension that is 3/8 drive but sometimes for the top one i use a 1/2 inch adapter because the 1/2 drive bar stays squarer because it can rest down the starter . I have also jacked the right hand front high off the ground , while using safety stands so`s to get more purchase , this way feet can be used on chassis ETC .
 
cheers