flatcat19 Posted May 27, 2015 Report Share Posted May 27, 2015 Why the wider belt? Go back to a normal belt, maybe? And make sure it's tight this time. 1 Quote Link to comment
Stoffregen Motorsports Posted June 10, 2015 Report Share Posted June 10, 2015 I'd need closure. What's happened in the past two weeks? Should we start placing bets? I bet it was the alternator. 1 Quote Link to comment
TENDRIL Posted June 10, 2015 Report Share Posted June 10, 2015 is it too tight? 1 Quote Link to comment
hvyd Posted June 21, 2015 Author Report Share Posted June 21, 2015 Sorry for the lack of any updates. Unfortunately,I have not had a chance to mess with this issue. As soon as I figure it out I will definitely post what the problem was. 2 Quote Link to comment
Charlie69 Posted June 22, 2015 Report Share Posted June 22, 2015 Get a stock alternator. After market rebuilds do not hold up. 1 Quote Link to comment
tr8er Posted June 22, 2015 Report Share Posted June 22, 2015 If the belt is too wide, the V track will create too much side wall friction right? 2 Quote Link to comment
Stoffregen Motorsports Posted June 22, 2015 Report Share Posted June 22, 2015 Yes and it could throw the belt. It actually rolls the belt on it's side which is what throws it. 1 Quote Link to comment
Charlie69 Posted June 23, 2015 Report Share Posted June 23, 2015 Get a quality belt I run Gates and a quality alternator and enjoy life! Cheap parts are cheap parts. 1 Quote Link to comment
Stoffregen Motorsports Posted June 24, 2015 Report Share Posted June 24, 2015 Cheap parts suck. 1 Quote Link to comment
hvyd Posted August 14, 2015 Author Report Share Posted August 14, 2015 Again sorry for the lack of any update. I finally got to start chasing some wiring. Figured out if I unplug ignition relay draw noise on alternator goes away but it also stops charging. Ignition relay has four wires. 1 black and 3 black with white stipe. Black is ground. After tracing black w/ white striped wires 1 goes to coil. 1 goes to fuse block 1 goes to an electric fuel pump that is nonexistent. Changed coil, no difference. Changed ignition switch, no difference. Only thing I have not done is chased wires to where fuel pump should be. Also I might add 1 of the BW wires feeds multiple things in the cab Quote Link to comment
flatcat19 Posted August 14, 2015 Report Share Posted August 14, 2015 Change alt. Quote Link to comment
hvyd Posted August 14, 2015 Author Report Share Posted August 14, 2015 Did. brand new. not a reman. Quote Link to comment
flatcat19 Posted August 14, 2015 Report Share Posted August 14, 2015 Even new parts can be bad. I work at Toyota. When a belt noise is the complaint it is one of 3 things. Bad alt. Bad WP. Bad belt. If unplugging the charging side of the alt stops the noise-it's the alt. Quote Link to comment
hvyd Posted August 15, 2015 Author Report Share Posted August 15, 2015 Well, I'm at a loss. I have unplugged everything that I can and still allow truck to run. I guess it won't hurt to change the alternator again. Wish me luck. Quote Link to comment
Draker Posted August 15, 2015 Report Share Posted August 15, 2015 Post a picture... or even better... post a video!! Quote Link to comment
Stoffregen Motorsports Posted August 15, 2015 Report Share Posted August 15, 2015 Pics always help. Quote Link to comment
datzenmike Posted August 15, 2015 Report Share Posted August 15, 2015 The problem is I've been lending it to my nephew. So, to me out of nowhere this issue arises. Replaced alt and water pump same day. Belt squeals and starts smoking. Then shortly afterward breaks. I've had this setup on for years with no issues until 2 days ago. Water pump felt a bit stiff when spinning it so I replaced it thinking that was the problem. Replaced alternator first because voltage at idle was 12.6 ish and when I spun it there was an audible squeak. Alternator is new not a reman. Water pump is new not a reman. All the belts were for the datsun. Even bought a belt that was slightly wider then what was called for. Lol. Thanx Mike. OK, I've kinda narrowed it down to a huge draw on the alternator. While all wiring g is attached to alternator can here very audible wheering sound. When unplug negative on battery sound becomes less, unplug Harness to side of alternator it goes away completely. By doing that no more output on alt. I think what's happening is alt is becoming overworked getting hot and seizing causing belt to break. Have also changed batteries just for my own sanity. Under load alt is noisy like a load on it. Had battery tested load checked fine. 12.7 volts no load. Any rate battery is fine, even tried another battery that is new same situation. Saturn alt has a serpentine style pulley, I've put my belt pulley on it. Changed water pump pulley. Some how it's either a bad alt that I replaced alt on truck with or out of the blue my truck has developed an electrical issue causing an over draw on alt when running. Unplug battery load lessons on alt but it still is putting out 14.6v at output lug on alt. Unplug Harness and load sound goes away no more power output. Negative off battery,unplug Harness truck dies. Somewhere there is something in the truck that just developed and is overwhelming alt making it drag hard on belt over a few miles it smokes belt and snap. Why the wider belt? Go back to a normal belt, maybe? And make sure it's tight this time. Only two physical things I can see that are not answered are... 1/ You say alt (and water pump) was replaced but was this before or after the belt began to smoke and break??? 2/ You say a wider belt was put on. Flatcat's suggestion of a 'normal' belt should be tried. In my opinion the alternator cannot belt slip just from a heavy load from charging. At maximum charge... 100 amps at 14 volts is 1,400 watts or 1.87 horse power. Assuming correctly, that nothing is 100% efficient lets say it 200% out, that's way under 4 horse power load on that belt. That's nothing. The alternator would have to seize to smoke the belt or the belt is wrong width? In perspective I have started a frozen engine with the water pump completely stopped with ice. The belt slipped and did smoke and was screeching. 1 Quote Link to comment
hvyd Posted August 15, 2015 Author Report Share Posted August 15, 2015 So I changed alternator this morning again with another brand new one. The noise has been greatly reduced but still somewhat audible. Water pump and pulley were changed after belt began breaking. Stock size belt was what I originally replaced with than tried larger belt after 4 or 5 broken stock size belts. Quote Link to comment
hvyd Posted August 15, 2015 Author Report Share Posted August 15, 2015 So far so good. Going to a local meet tonight and hope all is well. Quote Link to comment
hvyd Posted August 16, 2015 Author Report Share Posted August 16, 2015 Made a 50 mile round trip and all is well ao far. Guess first replacement alternator was a dud so got another new alternator and it works. Thanks for all the advice. 2 Quote Link to comment
hvyd Posted August 18, 2015 Author Report Share Posted August 18, 2015 Made it to work and back with out an issue. Think the alternator was the whole problem. Quote Link to comment
flatcat19 Posted August 18, 2015 Report Share Posted August 18, 2015 How about that. Quote Link to comment
datzenmike Posted August 18, 2015 Report Share Posted August 18, 2015 Only two physical things I can see that are not answered are... 1/ You say alt (and water pump) was replaced but was this before or after the belt began to smoke and break??? 2/ You say a wider belt was put on. Flatcat's suggestion of a 'normal' belt should be tried. In my opinion the alternator cannot belt slip just from a heavy load from charging. At maximum charge... 100 amps at 14 volts is 1,400 watts or 1.87 horse power. Assuming correctly, that nothing is 100% efficient lets say it 200% out, that's way under 4 horse power load on that belt. That's nothing. The alternator would have to seize to smoke the belt or the belt is wrong width? In perspective I have started a frozen engine with the water pump completely stopped with ice. The belt slipped and did smoke and was screeching. As title says. I've replaced alternator and water pump. Running Saturn 90 amp alt. Pulleys are clean and spin straight. I'm at a loss. Any help would be great. Even found a slightly wider belt . If you had said that after replacing the alternator the belt began breaking this could have been solved on the first page. Your title says breaking belts, but first post infers that you replaced alternator and the pump. Oh well.... Quote Link to comment
Stoffregen Motorsports Posted August 18, 2015 Report Share Posted August 18, 2015 There's always more to the story. Problems like this can easily be resolved if you can back track to when the problem started and un-do or re-do whatever it was that was changed. Quote Link to comment
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