78 Liquifire rebuild!

[snowmoer]

I would leave the heat exchanger as it is. My Ski Doo's have a finned exchanger like this and I have never had any problems with it. Unless you are going to ride in low snow conditions on dirt roads, everything will be just fine.

[400brian]

I took the exchanger fins down to about 1/8" and called it good.
Just have it sitting in the tunnel for the photo, but you get the idea.

I started out with a 40 grit flap wheel, but that was too slow, so I switched to a regular grinding wheel. I have been told the disc would clog, but I really had no problems. I went through 3 grinder discs on this job, and the finished off with a 120 flap disc and then an orbital sander.

[400brian]

We have a had a lot of family trauma as of late, but I did finally get the heat exchanger installed. I put new push washers on the carriage bolts to hold them in place, polished up the hose fittings, put a bit of sealant on the foam gaskets, and then added new washers and nuts.