I usually tighten Grammys to the point that I turn on all the accessories at once and don't get the belt squeal. Anything tighter then that is prematurely wearing out your alt bearings.
Don't go by the factory volt meter. The meter is sensing its voltage through the ignition switch. And on our CJ's all the electrician load goes through one set of contacts and it drops a lot of voltage.
I ran a wire directly from the battery to the cigarette lighter and use a volt meter for the cig lighter from innova its a lot more accurate then the gauge on the dash.
I also set my idle so I see 13v with all the accessories on. Lights, heater fan, etc.
Check your belts again, they wear on the sides and a ridge forms. Eventually the base of the belt contacts the pulley and you start to lose grip, hence they start to squeal even though they are tensioned and look fine.
X2, and I would make it the groved belt, they get more traction than smooth belts thus extending bearing life. If the sides of the pulleys are worn, no new belt or any amount of tention will fix it. The belt (new or used) should set at the top of the pulley, not sunk into the v slot of it.
hey 1981 cj5, nice to see another oklahoman on here. i was beggining to think i was the only one haha
Well I stop in from time to time, to many interestes and not enuf time or money for them. Do you get to TOR (Tulsa Off Road) several locals there, and local events posted, etc. Oh ya Tulsa is just outside of Oakhurst, with way more rules! You are not alone!!
Possibly when the alternator was changed, the new one had a narrower groove width pulley. On my '81, the PO changed the alt. and the belt sticks out of the groove. It slips and squeals sometimes. I am restoring my Jeep and am going to a 1/2" wide pulley. The pulley on mine is currently 3/8".
Check your connection where your alternator cable meets the solenoid. This is also where the red, 12v chassis supply cable is present. An easy way to do this is see if the connection gets hot after only a few moments. If it does get hot then I suggest re-terminating them with a crimped wet/solder connection. I had the same problem on my CJ5 and have never had another voltage problem since re-terminating that connection. I also did the JeepHammer battery cable upgrade at the same time. It's very amazing how a CJ acts when you feed her a proper 12v and ground.
'77 CJ-5 Renegade 304 / T-150, Dana 20, 30/20 axles, Aussie Locker in the Dana 30, American Racing 15x10 Outlaw II's, 33" Dynapro M/T's" ,Optima Battery, TeamRushed + Summit Racing CDI ignition, FlowKooler water pump, Edelbrock Performer Intake Manifold, Holley 4160 390cfm, Herculiner, Silver Ceramic Coated Hedman Hedders, Flowmaster 40's.
Warn PowerPlant HD 12K Winch, Dirtworx front and rear bumpers.