I have the 3 gm30 f engine. The engine is a jewel. It has been totally maintenance (repair) free and 100% leak free for nearly 20 years. The only complaint is the alternator loosens up periodically. Maybe every 15 hours at constant 2800. I have a brand new belt on it and the oem alternator bracket. I’m from the automotive world and in observing the adjustment I notice to get the proper tension on the belt I am at the very end of the adjustment slot. I shopped slightly smaller automative cross over applications with no luck. Has any other of you experienced this with the 3gm30 f engine?