Sounds like classic tensioners to me.. Pull them out and clean them with some Marvel Mystery oil heated to around 160F... Partially submerge them and pump on the pistons until clean oil appears and then reinstall.. You should be good to go.
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Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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