chrisc11 Posted March 1, 2021 Share Posted March 1, 2021 Hello chaps, Please excuse my ignorance because when it comes to cars I know absolutely nothing, I am posting this because my granddad has a Triumph Herald 1200 and always comes to me when he needs to buy parts online and I am having a hard time figuring out what half of them are even called, let alone find them on ebay for a price my granddad approves. I took a picture and I would really appreciate it if someone could point me in the right direction. What is this thing:My granddad says it's a cap for the coolant system and the problem is that it's leaking so he needs a new one. Thank you guys! Quote Link to comment Share on other sites More sharing options...
pageste Posted March 1, 2021 Share Posted March 1, 2021 It looks suspicously like a " core plug" which as you say is a seal for the water system. There are a few different types and Im pretty sure someone will be on shortly to tell you which you need. Ive only had to do one once and it is fairly easy to tap the old one out and the new one in. Your grandad will probably be able to tell you how they used to use an old penny when they were unable to get the real plugs. Quote Link to comment Share on other sites More sharing options...
glang Posted March 1, 2021 Share Posted March 1, 2021 yes there are cup and dished types and yours looks like the second. They come in different sizes either as a kit for the whole engine or individually at only a pound or so each (postage is going to cost you more). Im sure someone can tell you the size of the one you want or get your grandad to measure its diameter as it will be 11/4, 11/2 or 13/4 inches etc... Quote Link to comment Share on other sites More sharing options...
chrisc11 Posted March 2, 2021 Author Share Posted March 2, 2021 That is excellent info thank you guys so much! I'll measure it and then search around to see what I can find! thanks again! Quote Link to comment Share on other sites More sharing options...
herald948 Posted March 11, 2021 Share Posted March 11, 2021 According to the Canley Classics website, this is a "Core plug - 1 1/4"." Dished type (which I suspect is what you have is part number 56712; the bucket type is part number 144686. https://canleyclassics.com/?catalogue=triumph-herald-1200&diagram=triumph-herald-1200-engine Quote Link to comment Share on other sites More sharing options...
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