oleskool Posted January 21, 2023 Share Posted January 21, 2023 Like the title says. Looking for a factory thermostat for the MJ etc. haven’t had great luck with aftermarket working correctly haha. Link to comment Share on other sites More sharing options...
TheDude Posted January 21, 2023 Share Posted January 21, 2023 Get a Motorad tstat. They supply most dealers with their thermostats. Link to comment Share on other sites More sharing options...
eaglescout526 Posted January 21, 2023 Share Posted January 21, 2023 Mopar still makes them. Link to comment Share on other sites More sharing options...
oleskool Posted January 21, 2023 Author Share Posted January 21, 2023 1 hour ago, eaglescout526 said: Mopar still makes them. Do you have the part number. Everyone I looked up was discontinued. Link to comment Share on other sites More sharing options...
eaglescout526 Posted January 21, 2023 Share Posted January 21, 2023 83501426AD Currently on back order Link to comment Share on other sites More sharing options...
TheDude Posted January 21, 2023 Share Posted January 21, 2023 8 hours ago, eaglescout526 said: Mopar still makes them. Mopar just uses Motorad thermostats in Mopar packaging. The stats say Motorad on them clear as day. Link to comment Share on other sites More sharing options...
saveevryjp1998 Posted January 21, 2023 Share Posted January 21, 2023 11 hours ago, oleskool said: Like the title says. Looking for a factory thermostat for the MJ etc. haven’t had great luck with aftermarket working correctly haha. I always encourage people to test them first in a pot of water of the stove. It's easy to do and a foolish thing not to if your going low budget chain box store brands. Most the faulty ones will stick or get caught up. Just like alternators, never trust a single reading. Do it several times to make sure it's consistent without any failures. I've had pretty decent luck with Murray from O'Reilly's over the years. If your system is full of garbage though, it won't matter since any brand will eventually stick from the crud rust and who knows what lazy leak fix from prior owners over the years. It's amazing how many turd heaps I've bought that the head looks worse inside than the scrap pile of used drums and rotors at a salvage yard. Lol the floor pans looked better even if they were gone here in the rust belt. Link to comment Share on other sites More sharing options...
eaglescout526 Posted January 21, 2023 Share Posted January 21, 2023 1 hour ago, TheDude said: Mopar just uses Motorad thermostats in Mopar packaging. The stats say Motorad on them clear as day. Oh I know, but the OP was having issues locating OEM with the number. Link to comment Share on other sites More sharing options...
oleskool Posted January 21, 2023 Author Share Posted January 21, 2023 1 hour ago, saveevryjp1998 said: I always encourage people to test them first in a pot of water of the stove. It's easy to do and a foolish thing not to if your going low budget chain box store brands. Most the faulty ones will stick or get caught up. Just like alternators, never trust a single reading. Do it several times to make sure it's consistent without any failures. I've had pretty decent luck with Murray from O'Reilly's over the years. If your system is full of garbage though, it won't matter since any brand will eventually stick from the crud rust and who knows what lazy leak fix from prior owners over the years. It's amazing how many turd heaps I've bought that the head looks worse inside than the scrap pile of used drums and rotors at a salvage yard. Lol the floor pans looked better even if they were gone here in the rust belt. I do test them and my coolant system is spotless haha. Went through the entire thing when I pulled the truck out of the barn it was in. It worked fine for over a year and no randomly sticks. It’s a motorad thermostat. Guess I’ll try another and see how it goes. Link to comment Share on other sites More sharing options...
oleskool Posted January 21, 2023 Author Share Posted January 21, 2023 Thank you everyone for all the help and advice. Hopefully this one works longer than a year! Link to comment Share on other sites More sharing options...
oleskool Posted January 22, 2023 Author Share Posted January 22, 2023 On 1/21/2023 at 8:18 AM, eaglescout526 said: Oh I know, but the OP was having issues locating OEM with the number. Just an FYI. I found one I had NOS on the shelf. It was the kit with gaskets etc. the Mopar design is completely different from the Motorad I had in the truck. I’m sure things changed a little in the past 30 years but some key design features were not in the Motorad. I found that pretty interesting. I also swapped the CTS to the gooseneck yesterday. What I found on the Motorad is that it had a rubber stopped on the plunger that would swell slightly and stick. It wasn’t noticeable to the eye but measuring it definitely showed a difference from a new one to a used one. again thanks for all the help as always. This place is amazing. Link to comment Share on other sites More sharing options...
Pete M Posted January 22, 2023 Share Posted January 22, 2023 moved to Tech for the obvious tech-y reasons. Link to comment Share on other sites More sharing options...
oleskool Posted January 22, 2023 Author Share Posted January 22, 2023 1 hour ago, Pete M said: moved to Tech for the obvious tech-y reasons. Haha. Yeah that went sideways fast 😂. I wish I had taken pics of the thermostats. I picked up the kit off eBay a year or so ago for $15. on a side note the CTS relocation is doing great. Link to comment Share on other sites More sharing options...
fiatslug87 Posted January 22, 2023 Share Posted January 22, 2023 No pictures comparing the NOS and Motorad? Link to comment Share on other sites More sharing options...
oleskool Posted January 22, 2023 Author Share Posted January 22, 2023 3 hours ago, fiatslug87 said: No pictures comparing the NOS and Motorad? Sadly no. I was to busy trying to put the jeep back together before rain moved in. Link to comment Share on other sites More sharing options...
cruiser54 Posted January 23, 2023 Share Posted January 23, 2023 The aftermarket MotoRad stats are not the same as the MOPAR MotoRad stats. I believe the suffix on the part number, the AC, the AD, only indicates the gasket selection included. Any 83501426XX will have the stat you're looking for. Link to comment Share on other sites More sharing options...
oleskool Posted January 23, 2023 Author Share Posted January 23, 2023 2 hours ago, cruiser54 said: The aftermarket MotoRad stats are not the same as the MOPAR MotoRad stats. I believe the suffix on the part number, the AC, the AD, only indicates the gasket selection included. Any 83501426XX will have the stat you're looking for. You are correct. The kit I had was AC designation. The NOS has the weep hole to help bleed the system. It also has a metal stopper instead of runner and a higher coil count spring. NOS also tells you which side is up and which side faces the radiator 😂 Link to comment Share on other sites More sharing options...
fiatslug87 Posted January 27, 2023 Share Posted January 27, 2023 Well I purchased a Crown one from Amazon PN 83501426T and it does not have the pressure relief valve and is a repackaged MotoRad. It’s going back. Link to comment Share on other sites More sharing options...
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