{"id":5581,"date":"2025-11-25T09:18:57","date_gmt":"2025-11-25T13:18:57","guid":{"rendered":"https:\/\/kgworks.ca\/?p=5581"},"modified":"2025-11-25T09:18:57","modified_gmt":"2025-11-25T13:18:57","slug":"balancing-engine-pistons-and-rods","status":"publish","type":"post","link":"https:\/\/kgworks.ca\/?p=5581","title":{"rendered":"Balancing engine pistons and rods"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3880.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3880.jpg\" alt=\"\" class=\"wp-image-5582\" srcset=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3880.jpg 1024w, https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3880-300x225.jpg 300w, https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3880-768x576.jpg 768w\" sizes=\"(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/a><\/figure>\n\n\n\n<p>On to balancing the pistons. Unfortunately I wasn&#8217;t able to balance the pistons and rods separately. I had to send them out for the rods to be removed from the original pistons and the the new pistons &#8216;hung&#8217; on the rods. I didn&#8217;t want to mess with them and ruin a piston in the process.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3882.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3882.jpg\" alt=\"\" class=\"wp-image-5583\" srcset=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3882.jpg 768w, https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3882-225x300.jpg 225w\" sizes=\"(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/a><\/figure>\n\n\n\n<p>I did weight all the pistons before they went to R&amp;D to be hung on the original rods. This won&#8217;t be a professional balance by any means, but at least the pistons will be about the same weight and the piston\/rod weight will be also about the same. I&#8217;ve sealed off the wrist pins as best I can to prevent any fine filings from lodging between the piston and its pin.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3883.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3883.jpg\" alt=\"\" class=\"wp-image-5584\" srcset=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3883.jpg 1024w, https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3883-300x225.jpg 300w, https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3883-768x576.jpg 768w\" sizes=\"(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/a><\/figure>\n\n\n\n<p>The recommended p rocedure is to remove metal from the pin bosses. With the pins in place I didn&#8217;t want to grind near them so I removed what I needed from the outside bottom surface and any adjoining casting ridges.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3885.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3885.jpg\" alt=\"\" class=\"wp-image-5585\" srcset=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3885.jpg 1024w, https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3885-300x225.jpg 300w, https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3885-768x576.jpg 768w\" sizes=\"(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/a><\/figure>\n\n\n\n<p>Once the piston difference was evened out I removed the remaining weight from the total piston\/rod combination from the metal blob on the end rod cap. For example if the total weight was 1309 grams which was 7 grams heavier than the lightest piston\/rod weight and the piston was 3 grams heavier than the lightest piston I first removed the 3 grams from the piston and then took the remaining 4 grams from the the rod cap.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3886.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3886.jpg\" alt=\"\" class=\"wp-image-5586\" srcset=\"https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3886.jpg 1024w, https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3886-300x225.jpg 300w, https:\/\/kgworks.ca\/wp-content\/uploads\/2025\/11\/IMG_3886-768x576.jpg 768w\" sizes=\"(max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/a><\/figure>\n\n\n\n<p>After a couple of hours I had them all done. They all are now about 1302 grams each. My scale only goes to rounded grams. I could have done better with a scale that showed a couple of decimals. Even so this should help the engine run smoother.<\/p>\n\n\n\n<p>Next: Getting the pistons in.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>On to balancing the pistons. Unfortunately I wasn&#8217;t able to balance the pistons and rods separately. I had to send them out for the rods to be removed from the original pistons and the the new pistons &#8216;hung&#8217; on the rods. I didn&#8217;t want to mess with them and ruin a piston in the process. &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/kgworks.ca\/?p=5581\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Balancing engine pistons and rods&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/kgworks.ca\/index.php?rest_route=\/wp\/v2\/posts\/5581"}],"collection":[{"href":"https:\/\/kgworks.ca\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kgworks.ca\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kgworks.ca\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kgworks.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5581"}],"version-history":[{"count":3,"href":"https:\/\/kgworks.ca\/index.php?rest_route=\/wp\/v2\/posts\/5581\/revisions"}],"predecessor-version":[{"id":5598,"href":"https:\/\/kgworks.ca\/index.php?rest_route=\/wp\/v2\/posts\/5581\/revisions\/5598"}],"wp:attachment":[{"href":"https:\/\/kgworks.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kgworks.ca\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kgworks.ca\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}