1987Comanche Posted February 24, 2010 Share Posted February 24, 2010 Are the fuel tank rollover valves/vent valves interchangeable between the XJ and MJ (specifically 1990)? I discovered my tank is holding a lot of pressure and apparently neither vent valve works. I pulled a set of vent valves from a '90 XJ that work fine (vacuum tested both) and they look like they'll fit. I know the tanks & sending units are different so before I drop the tank again I wanted to confirm they would, in fact, be a direct replacement. Quote Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 24, 2010 Share Posted February 24, 2010 Are the fuel tank rollover valves/vent valves interchangeable between the XJ and MJ (specifically 1990)? The 90 XJ & MJ vent valves have the same part numbers, so I'd say yes. :cheers: Quote Link to comment Share on other sites More sharing options...
1987Comanche Posted February 25, 2010 Author Share Posted February 25, 2010 Exactly what I needed to know. :thumbsup: I suspected they were the same but wanted to be sure before I dropped the tank. Quote Link to comment Share on other sites More sharing options...
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