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Cobra Forums
2013-14 Shelby GT500
Removing drivers side cam cover
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<blockquote data-quote="Snoopy49" data-source="post: 15225547" data-attributes="member: 138649"><p>From the description on page 18 of the camshaft removal pdf, it looks like there is a ratchet mechanism on both the RH and LH primary chain tensioners that can be damaged if the tensioners are not compressed properly.</p><p></p><p>The following is a guess on my part. I have never done this procedure and only have the service manual description to work from. Maybe someone with direct experience can right what is wrong with my supposition and fill in the blanks.</p><p></p><p>It looks like the ratchet mechanism prevents slack in the primary timing chain. When slack occurs the piston pushes against the primary timing chain tensioner arm and the ratchet mechanism extends and holds that position. When you removed all the tension in the system, you also allowed the ratchet mechanism to move to it's fully extended position. Pretty much rendering the automatic tensioner useless.</p></blockquote><p></p>
[QUOTE="Snoopy49, post: 15225547, member: 138649"] From the description on page 18 of the camshaft removal pdf, it looks like there is a ratchet mechanism on both the RH and LH primary chain tensioners that can be damaged if the tensioners are not compressed properly. The following is a guess on my part. I have never done this procedure and only have the service manual description to work from. Maybe someone with direct experience can right what is wrong with my supposition and fill in the blanks. It looks like the ratchet mechanism prevents slack in the primary timing chain. When slack occurs the piston pushes against the primary timing chain tensioner arm and the ratchet mechanism extends and holds that position. When you removed all the tension in the system, you also allowed the ratchet mechanism to move to it's fully extended position. Pretty much rendering the automatic tensioner useless. [/QUOTE]
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2013-14 Shelby GT500
Removing drivers side cam cover
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