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Pull the cam covers, remove the valve train and the lifter carriers. Look for cracks in the area under the lifter carrier while you are there and some coolant in the region is the best tell tale sign. Why? Because its guilty until proven innocent and you may as well look for whatever you can while you can.
Replace the 4/5 chains, have the lifters ultrasonically cleaned and inspect the cams for wear and lobe taper as well as the crowns of the lifters for wear. If all is well slap a new set of wear pads on the variorum servo and put it all back together. Problem solved.
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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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