SQM, does a precautionary plenum replacement with the Dorman plenum seem worthwhile? Since plenums do not announce they are leaking, such problems have seemed to come out of nowhere to many Buick (and GM) owners.
Pro-active plenum replacement now, rather than later spending $800.00 to $1,000.00 to repair the engine, becomes much more attractive.
There are two plenums-- upper and lower. Because both are likely of the same plastic, are leaks possible with either plenum? If a plenum if purchased from Dorman, do you recommend both upper and lower?
Fortunately, I have had this car almost two years without major problems but have driven it little. I also am aware 245,000 miles enters a danger zone for parts failure. Already, I have replaced the battery, and worked through a VATS system lockdown (with the help of 2CarPros, Joe). Now, as the parts aftermarket for the Buick 1998 begins to fade, I am eager to pre-empt any avoidable problem. What is your recommendation? (I do not know the car's history, since the wife of the guy who sold it threw out his repair papers while cleaning house).
Possible future issues with engine--
1. Water pump
2. Alternator
3. Accessory belt and tensioner pulley
Do others come to mind?
Tuesday, October 12th, 2021 AT 5:16 PM
