CJ/YJ Heater Mix
I am in the process of swapping of YJ tub into my CJ. I have the CJ heater core and was wondering if it would fit into the YJ heater cowl that is in my YJ tub?
Yes, they are the same.If your not planning to already,do yourself a solid and go to the parts store,order up a siemens PM102 blower motor. About 25$ or less. Take a dremel with fiberglass cutoff wheel,or tool of your choice, and open that firewall hole up about 3/8" all the way around,spray it with some clear to protect the bare metal from the trim. Stuff the bigger motor in there with some gasket maker or cut a piece of material to custom seal the larger motor to the firewall. Best bang for your buck upgrade I ever seen,especially since you already have the heater out. I would replace the core too,mine was like 30$ from autobone. Again,since it was already apart, definitely worth the peace of mind. The best 50$ I ever spent on my jeep. There's plenty more information in the sticky or search function.
You re-use the old fan.It bolts right on to the new one which should come with a new locking nut,no other mods needed. It took me like five minutes with a dremel, but there's lot's of write-ups about other methods to open the firewall, but it's invisible after install, so I kept it simple. The increase in heat/defrost flow is incredible and much appreciated up here in Seattle. I am going to add a dedicated ground to the fan as well,to make sure it's getting full flow,but it work's great as is.
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