Jakobi
Super Moderator
You should not need to drain the whole system, if you just take the bolts out of the rad hose connection and pop it loose there is enough suction in the system to keep the antifreeze in.
My Star Head leaked with the bolts they gave me too, the bolts look sweet, but I had to replace them. I used the factory head bolts so I could actually tighten them, and added some antiseize while I was at it. They didn't have much room but once you get them tightened down they fit perfectly.
Thanks for the info. No issues with the head bolts leaking at all. I had considered using the other allen head bolts I was using on the 300 as they were a size larger but stuck with the ones supplied. They haven't leaked at all other than the frog wee
