I would say do it for peace of mind and the fact the the 3.5L is a no tolerance motor and can bend valves if it breaks, right? 100k is 6.5 years at 15k a year so it is due by a timeline. Heat and time are contributing factors. Like the others stated, check for cracks and the ribs for dry rot. I think I read in past post to do the water pump and tensioner at the same time while you r in there.
Originally Posted by lasturbo
Super VXer
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