{"id":17222,"date":"2023-01-30T14:06:12","date_gmt":"2023-01-30T19:06:12","guid":{"rendered":"https:\/\/gm-techlink.com\/?p=17222"},"modified":"2023-01-30T14:06:21","modified_gmt":"2023-01-30T19:06:21","slug":"hfv6-gen-2-engine-timing-chain-installation","status":"publish","type":"post","link":"https:\/\/gm-techlink.com\/?p=17222","title":{"rendered":"HFV6 Gen 2 Engine Timing Chain Installation"},"content":{"rendered":"

Proper timing chain installation on the High Feature V6 engine (RPO LGX, LGZ, LGY, LGW) requires confirming the location of the green-colored chain links. In order to get a proper perspective of the chain on the crankshaft sprocket, it\u2019s critical to view the chain directly in front of the crankshaft.<\/p>\n

Stage 2 Timing<\/strong><\/p>\n

If the green-colored links are not lined up before chain removal, correct timing still can be verified.<\/p>\n

There should be 30 chain links, including the links on the timing marks, between the intake camshaft actuator timing mark (Fig. 4, #12) and the crankshaft sprocket timing mark (Fig. 4, #7).<\/p>\n

There also should be 13 chain links, including the links on the timing marks, between the exhaust actuator timing mark (Fig. 4, #10) and the intake actuator timing mark (Fig. 4, #13).<\/p>\n

 <\/p>\n

\"\"Fig. 4<\/strong><\/p>\n

 <\/p>\n

To verify correct Stage 2 timing:<\/p>\n

    \n
  1. Put the crankshaft keyway at the Stage 2 (3 o\u2019clock) position.<\/li>\n
  2. Count the links between the intake actuator timing mark and the crankshaft timing mark. It should be 30 links.<\/li>\n
  3. Count the links between the intake actuator timing mark and the exhaust actuator timing mark. It should be 13 links.<\/li>\n<\/ol>\n

    TIP:<\/strong> Stage 1 and 2 chains are the same part number. Stage 1 and 2 crankshaft chain drive sprockets also are the same part number.<\/p>\n

    Stage 1 Timing<\/strong><\/p>\n

    The correct Stage 1 timing also can be verified if the green-colored links are not lined up before chain removal.<\/p>\n

    Between the exhaust camshaft actuator timing mark (Fig. 5, #4) and the crankshaft sprocket timing mark (Fig. 5, #7), there should be 30 chain links, including the links on the timing marks.<\/p>\n

    Between the intake actuator timing mark (Fig. 5, #2) and the exhaust actuator timing mark (Fig. 5, #3), there should be 13 chain links, including the links on the timing marks.<\/p>\n

     <\/p>\n

    \"\"Fig. 5<\/strong><\/p>\n

     <\/p>\n

    To verify correct Stage 1 timing:<\/p>\n

      \n
    1. Remove the Stage 2 chain and crank sprocket.<\/li>\n
    2. Remove the oil pump chain and crank sprocket.<\/li>\n
    3. Put the crankshaft keyway at the Stage 1 (11 o\u2019clock) position.<\/li>\n
    4. Count the links between the exhaust actuator timing mark and the crankshaft timing mark. It should be 30 links.<\/li>\n
    5. Count the links between the intake actuator timing mark and the exhaust actuator timing mark. It should be 13 links.<\/li>\n<\/ol>\n

      Setting the Timing Chain<\/strong><\/p>\n

      A common error when setting the chain timing is not looking straight on at the crankshaft sprocket, especially Stage 1.<\/p>\n

      From a high angle (Fig. 6), it is very difficult to see if the chain link is properly set on the crank sprocket timing mark.<\/p>\n

       <\/p>\n

      \"\"Fig. 6<\/strong><\/p>\n

       <\/p>\n

      Even with the green-colored links not lined up prior to Stage 1 chain removal, counting the links can show that link number 30 is off one tooth from the timing mark. (Fig. 7)<\/p>\n

       <\/p>\n

      \"\"Fig. 7<\/strong><\/p>\n

       <\/p>\n

      From a higher angle, the chain may look correct, but with a straight-on view, it is easy to see it is off. Improper timing as shown may set Stage 2 DTCs P0018, P0019 and P0021.<\/p>\n

      When viewing the crankshaft straight on, it\u2019s easy to see if the green-colored link is in the correct position to the sprocket timing mark. (Fig. 8)<\/p>\n

       <\/p>\n

      \"\"Fig. 8<\/strong><\/p>\n

       <\/p>\n

      Viewing the crankshaft at the correct angle \u2014 either visually or by using a camera \u2014 is critical to properly installation of the chain on the crankshaft drive sprocket.<\/p>\n

      – Thanks to Hank Poelman<\/em><\/p>\n

      \n","protected":false},"excerpt":{"rendered":"

      Proper timing chain installation on the High Feature V6 engine (RPO LGX, LGZ, LGY, LGW) requires confirming the location of the green-colored chain links. In order to get a proper […]<\/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":[136],"tags":[],"class_list":["post-17222","post","type-post","status-publish","format-standard","hentry","category-2023-january-b"],"_links":{"self":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/17222","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=17222"}],"version-history":[{"count":2,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/17222\/revisions"}],"predecessor-version":[{"id":17224,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=\/wp\/v2\/posts\/17222\/revisions\/17224"}],"wp:attachment":[{"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=17222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gm-techlink.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}