{"id":9437,"date":"2018-02-21T10:16:24","date_gmt":"2018-02-21T15:16:24","guid":{"rendered":"https:\/\/techlink.mynetworkcontent.com\/?p=9437"},"modified":"2019-01-03T12:03:39","modified_gmt":"2019-01-03T17:03:39","slug":"duramax-diesel-cooling-system-pressure-test-adapter","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=9437","title":{"rendered":"Duramax Diesel Cooling System Pressure Test Adapter"},"content":{"rendered":"<p>When draining and filling the cooling system on 2017-2018 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P), the correct special tools must be used.<\/p>\n<p>In some cases, instead of installing the GE-52098-A Cooling System Pressure Test Adapter on the radiator surge tank, an aftermarket pressure test adapter is being used instead that is not designed for <a href=\"https:\/\/techlink.mynetworkcontent.com\/?p=8226\"><strong>evacuating and filling the cooling system<\/strong><\/a>. The adapter is a left-hand adapter that threads onto the top of the surge tank. (Fig. 9)<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-9424\" src=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2018\/02\/F09-Pressure-test-adapter-installed.png\" alt=\"\" width=\"358\" height=\"340\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2018\/02\/F09-Pressure-test-adapter-installed.png 358w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2018\/02\/F09-Pressure-test-adapter-installed-300x285.png 300w\" sizes=\"auto, (max-width: 358px) 100vw, 358px\" \/><strong>Fig. 9<\/strong><\/p>\n<p>The GE-52098-A adapter has two seals and an extended component that close off the vent chamber portion of the surge tank. (Fig. 10) Without these two seals, the adapter cannot properly evacuate the cooling system because air will leak back in from the atmosphere vent cap on the side of the radiator surge tank.<\/p>\n<p><a href=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2018\/02\/GE-52098-A.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-9462 aligncenter\" src=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2018\/02\/GE-52098-A.jpg\" alt=\"\" width=\"368\" height=\"455\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2018\/02\/GE-52098-A.jpg 368w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2018\/02\/GE-52098-A-243x300.jpg 243w\" sizes=\"auto, (max-width: 368px) 100vw, 368px\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><strong>Fig. 10<\/strong><\/p>\n<p>An aftermarket adapter not designed for this application that doesn\u2019t have these seals (Fig. 11) cannot isolate the vent chamber and the atmosphere vent cap because it does not reach down to the lower sealing area for the cap. As a result, it pulls vacuum against the vent cap. Without a proper vacuum on the system, it will not fill correctly, and air in the cooling system can cause engine damage.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-9426\" src=\"https:\/\/techlink.mynetworkcontent.com\/wp-content\/uploads\/2018\/02\/F11-Aftermarket-adapter-L5P.jpg\" alt=\"\" width=\"414\" height=\"500\" srcset=\"https:\/\/gm-techlink.com\/wp-content\/uploads\/2018\/02\/F11-Aftermarket-adapter-L5P.jpg 414w, https:\/\/gm-techlink.com\/wp-content\/uploads\/2018\/02\/F11-Aftermarket-adapter-L5P-248x300.jpg 248w\" sizes=\"auto, (max-width: 414px) 100vw, 414px\" \/><strong>Fig. 11<\/strong><\/p>\n<p>When draining and filling the Duramax diesel (L5P) cooling system, only the GE-52098-A pressure test adapter should be used. Do not use an aftermarket adapter not designed for this application.<\/p>\n<p><em>&#8211; Thanks to David MacGillis<\/em><\/p>\n<p>&nbsp;<\/p>\n<p><em>Updated February 23, 2018<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>When draining and filling the cooling system on 2017-2018 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P), the correct special tools must be used. In [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-9437","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/9437","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9437"}],"version-history":[{"count":3,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/9437\/revisions"}],"predecessor-version":[{"id":9463,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/9437\/revisions\/9463"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9437"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9437"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9437"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}