Has anyone ever used RTV on the coolant bypass in place of the o ring? Seems that I've lost the o ring that seals the coolant down tube from the thermostat housing to the top of the water pump. I pulled it on purpose. There was an o ring labeled "coolant bypass" in my Merchant kit but it's too big? Kinda pisses me off, but I can't see why copper or grey RTV won't work. Nearest stealer is 20mi away and closing and I can't see my self stopping after as much progress as I've made today.