Head Mechanic at St Charles said..
....MMMMmm..good question.
I'm thinking age gets it , and its time to change.
jo
Greetings, Earthling. We come in peace... Never mind "Paris to Dakar", the VehiCROSS looks ready for the Martian desert.
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.
Larry S.
99 Astral Silver VX (176k)
91 Porsche 928 S4 (73k)