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Apr 12, 2011 09:11 AM

Kashering my oven grates (Chow..plz don't move this thread)

Chow Editors: I need fellow >kosher< foodies with similar ovens to answer this question, please don't move the thread until I get an answer.

I'm going to kasher my oven this week (it's a year old) and I am going to be putting the grates and burner caps in as well.

I know it is going to ruin the finish but what about the little rubber feet on the grates? Am I going to set my oven on fire when I do this?


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  1. there is a very good chance you will ruin the grates

    (the burner caps can be washed and covered with aluminum foil.

    I redid my kitchen a few years ago and bought a set of separate Pesach grates for my new Fleishing and dairy ovens. It was an additional expense back then, but it has payed off.

    1. Just to clarify, are you talking about putting the grates and caps for your gas cooktop into your oven to kasher them?

      10 Replies
      1. re: mamaleh

        that how it sounded to me. putting the grates and caps into a self-cleaning oven

        1. re: mamaleh

          If that is the case, I definitely would not put the caps in the oven. If there is any gas residue on them, they can explode. You should be able to kasher them cleaning them well with soap and water, and then turning on the flame for a few minutes to burn off anything that remains. If the grates have rubber feet on them, can you even kasher them at all? I have a Viking cooktop, and mine do not have rubber feet. I kasher them by putting them in the oven at 500 for an hour, and not on the self-cleaning cycle.

          1. re: mamaleh

            What is 'gas residue'? If there is such a thing, why would it be "sticking" to the caps? And why would it explode? Have you ever heard of this happening?

            "Residue" aside, if the caps are nothing but metal (and maybe an enamel coating), you can put them in the oven for a self-clean cycle. They will likely get discolored. The coating may flake off. Otherwise, they will be fine. I've done it for years. On the other hand, if I had a high-end range, I probably wouldn't.

            If the grates have rubber feet, don't put them in a heated oven for any amount of time. That's plain common-sense. (Why do you think Chowhounders would know if your specific rubber feet would melt?)

            Best advice? Ask a Rabbi about how to Kasher your oven properly.

            1. re: mamaleh

              Natural gas is not gasoline. And it doesn't leave "residue" (and even if it such a thing were possible - and it's not - it would burn off the grates under normal use). As psycomp points out, the bigger problem is putting rubber into an oven under high temperature - never a good idea. Even if it's silicone a self-cleaning cycle can reach 800-900 degrees much higher than recommended.

              You can kasher the grates by keeping your burners on high for an hour and then covering non-metallic parts with foil during Pesach.

              1. re: mamaleh

                In high school, we had an explosion in our school kitchen while gas caps were being kashered, and we were told that is what happened, but I'm sure there could be other explanations. Since then, the rabbi of our school told us to kasher them in place instead. And thanks Psycomp, one should ask one's rabbi.

                1. re: mamaleh

                  Turns out I was able to pry the feet out. I've kashered grates and burners from my old cooktop sucessfully.

                  SoCal Mother once wrote something about the "little rubber feet" on another thread. I;m hoping she can weigh in.

                  1. re: vallevin

                    Yup. I have a Kitchenaid gas cooktop. The rubber feet were not supposed to be removable and they were ruined when I removed them to run the grate through the self-clean. I got some replacement feet but they were not the correct type. (The folks at Kitchenaid customer support really truly don't know what they are doing.) The grate came very clean but now the top is scratched a bit where the feet sit on the metal.

                  2. re: mamaleh

                    What it could be was trapped gas under the cap. If you removed the cap, always kept it with the hole down, and then paced it in the oven I could see it happening, although I'm surprised it "exploded" rather than just gave a quick pop. The safest way to solve this is to dunk the caps in water and move it around to make sure there are no gas bubble.

                      1. re: ferret

                        Agreed, ferret. No gas exhibits the magical property of "floating stickyness".

              2. If anyone out there is looking for a checklist or reference guide for kashering your kitchen for Pesach, there is a free guide from Artscroll if your rabbi approves

                1 Reply
                1. re: mamaleh

                  ...and he is fairly machmir on most opinions..
                  you can see videos of koshering at the site , also a subtitled very meikel israeli video [at life in israel blog]---it is designed for secular jews to be the most minimally kosher according to someone....

                2. So those post script is that the grates and the burner caps seem in reasonably good condition. I was able to remove most of the feet >intact<, but they look kind of gross in that chometzy way so I think I am going to get some silicon caulk to put on the bottom of grates.

                  1 Reply
                  1. re: vallevin

                    wow..what a good idea! Specifics would be appreciated, I have difficulty changing lightbulbs and putting a new roll of toilet paper on.