There can be minor difference.. so if you know what one looks like.. there all about same place.. if yours is ford f53.. it may have 1 or 2yr earlier eng in it.. ford uses same light duty eng.. so get a book that is 1 or 2yrs earlier than coach.. for same eng and trans.. Is yours obd1 ? Or none at all..? Ask clerk if you can look at it.. it should get you close.. but you most likely have more than one issue from lack of maintenance.. parts today on rv need replaced because of time not miles.. the real issue is.. you can run an eng only hot once, but cold you can run for ever.. ,, if you believe it's running hot.. it's only a matter of time the eng will die.. is yours carb or fuel injection..? what yr, make, model and eng do you have? You can always add gauges.. in fact I have added 6 because the idiot gauges are unreliable.. keep us posted.. yes.. light duty truck eng same as used in pickups.. it's a shocker to those who don't understand how manufacturer makes money.. and pays CEO, hundreds of millions..
2000 southwind storm, workhorse custom chassis with 7.4l vortec