The tech would have rather done a new motor if it was an option. They were backed up 3 weeks before getting to it. took 2 weeks to get done.
A big prime rib will continue to cook after you take it out of the oven, so for a final medium-rare temperature of 130 F you need to take it when it reads 120 F on your instant-read thermometer. Note that the U.S. Department of Agriculture recommends all beef cuts be cooked to an internal temperature of 145 F.
The meat between the rib bones do not give a lot of leeway for using a thermometer but not to worry.. ribs are best cooked/smoked until they are tender. For spare ribs this normally takes about 6-7 hours. For Baby backs, you are looking at 5-6 hours depending on how meaty they are.For best results, use one or both of my tenderness tests below to make sure the ribs are ready to serve.or spare ribs this normally takes about 6-7 hours. For Baby backs, you are looking at 5-6 hours depending on how meaty they are. For best results, use one or both of my tenderness tests below to make sure the ribs are ready to serve.