{"id":53717,"date":"2017-10-31T12:51:02","date_gmt":"2017-10-31T17:51:02","guid":{"rendered":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/?p=53717"},"modified":"2017-10-31T12:51:02","modified_gmt":"2017-10-31T17:51:02","slug":"1999-chevy-tahoe-engine-timing","status":"publish","type":"post","link":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2017\/10\/1999-chevy-tahoe-engine-timing","title":{"rendered":"1999 Chevy Tahoe engine timing"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignnone size-full wp-image-53871\" src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2017\/10\/1999-chevy-tahoe.jpg\" alt=\"1999 Chevy Tahoe\" width=\"600\" height=\"341\" srcset=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2017\/10\/1999-chevy-tahoe.jpg 600w, https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2017\/10\/1999-chevy-tahoe-300x171.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n<p>I just bought a used motor w\/137K miles from a junk yard to install in my 99 Tahoe. I was about ready to drop it in when I notice the timing has been advanced 1\/4 to 3\/8&#8217;s of an inch. Does this probably mean what I think it means? The timing chain has probably jumped a tooth and needs to be replaced before I drop the motor in?<\/p>\n<hr \/>\n<h3>Camshaft and crankshaft sprockets<\/h3>\n<p>The engine timing is not adjustable. The cam retard offset will not be accurate below 1,000 rpm. What this means is, you cannot check the actual timing without it running. If you are just looking at the timing chain gears and they do not line up dot to dot, then inspect the camshaft and crankshaft sprockets for:<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-53870\" src=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2017\/10\/1999-chevy-tahoe-timing-gear-inspection.gif\" alt=\"timing gear diagram inspection\" width=\"320\" height=\"296\" \/><\/p>\n<ul>\n<li>Broken teeth (1)<\/li>\n<li>Damaged teeth (2)<\/li>\n<li>Chipped teeth (3)<\/li>\n<li>Worn teeth<\/li>\n<li>Uneven wear on one edge of the teeth<\/li>\n<li>Worn valleys between the sprocket teeth<\/li>\n<li>Crankshaft sprocket keyway for wear<\/li>\n<li>Crankshaft sprocket woodruff key for wear or damage<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>I just bought a used motor w\/137K miles from a junk yard to install in my 99 Tahoe. I was about ready to drop it in when I notice the timing has been advanced 1\/4 to 3\/8&#8217;s of an inch. Does this probably mean what I think it means? The timing chain has probably jumped&hellip;&nbsp;<a href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2017\/10\/1999-chevy-tahoe-engine-timing\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">1999 Chevy Tahoe engine timing<\/span><\/a><\/p>\n","protected":false},"author":14780,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[1,3],"tags":[20445,20443,20444,7634],"class_list":["post-53717","post","type-post","status-publish","format-standard","hentry","category-auto-repair-questions","category-chevy","tag-1999-chevy-tahoe-engine-timing","tag-camshaft-and-crankshaft-sprockets","tag-engine-timing","tag-tahoe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.0 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>1999 Chevy Tahoe engine timing - FreeAutoMechanic Advice<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2017\/10\/1999-chevy-tahoe-engine-timing\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"1999 Chevy Tahoe engine timing\" \/>\n<meta property=\"og:description\" content=\"I just bought a used motor w\/137K miles from a junk yard to install in my 99 Tahoe. I was about ready to drop it in when I notice the timing has been advanced 1\/4 to 3\/8&#8217;s of an inch. Does this probably mean what I think it means? 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I was about ready to drop it in when I notice the timing has been advanced 1\/4 to 3\/8&#8217;s of an inch. Does this probably mean what I think it means? The timing chain has probably jumped&hellip;&nbsp;Read More &raquo;1999 Chevy Tahoe engine timing","og_url":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/2017\/10\/1999-chevy-tahoe-engine-timing","og_site_name":"FreeAutoMechanic Advice","article_publisher":"https:\/\/www.facebook.com\/freeautomechanic","article_published_time":"2017-10-31T17:51:02+00:00","og_image":[{"url":"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2017\/10\/1999-chevy-tahoe.jpg","type":"","width":"","height":""}],"author":"ps0007@gmail.com","twitter_card":"summary_large_image","twitter_misc":{"Written by":"ps0007@gmail.com","Est. reading time":"1 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