That I600R is a ton of fun. I greased my liner slightly when I flew one earlier this year, pushed right out.
Ha! An I600R would do as an igniter for the motors I was trying to clean... :wink:
Well, I finally finished my liner removals tonight. Again, all 54mm-98mm (1 of each size) remaining, and none of them would give up without a fight.
First, I soaked all 3 in hot water, but this only seemed to help marginally. Maybe I didn't use hot enough water, or ?
Starting with my 75/6000, I inserted a front closure, then hammered it with a wooden dowel. This seemed to crunch/mushroom the liner more than knock it free. Removing it in pieces with more hammering in between, the last 12" or so finally slid out. I would liked to have seen the condition of the liner (looking for burn-throughs, etc.) as opposed to destroying it on the way out, but I didn't care much anymore at that point.
On to a 98/17500. This one REALLY wouldn't let go! After probably half an hour of hammering the ever living #$%@ out of the closure with a dowel (same method described above) with lots of explicatives and getting more of the same results (pieces), I finally figured I needed a better method. I wanted to try slicing it out but also didn't want to scratch the casing, so I took a length of 3/4" PVC pipe and cut the end diagonally on a scroll saw. This formed a similar "liner removal tool" as mentioned in earlier posts. Inserting it in between the liner and the case, now we've got some results. It separated the liner nicely and left the case unscathed. After doing this a few times (on different sides of the liner) and lots more hammering, it finally popped out.
Rinse and repeat on my 54/2800.
Now for a follow-up question - how in the world can I avoid going through this ordeal after every launch? I've never, ever had anywhere remotely near this amount of difficulty getting liners out. So, for those whose liners "slide right out like a dream," what's your secret? More grease on them during assembly? Different grease? WD-40??