wet alternator
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Senior User
Joined: Nov 2007
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From: Naples, FL
wet alternator
Hey guys my 79 F150 dies everytime a tiny bit of water splashes on my alternator. I pulled the 2 slip on plugs off the back and filled them with dielectric grease and put them back on. the third wire is a bolt on (its a pos wire) I just left it the way it is. the rubber cover on that one is broken off. do you think thats what makes it die??? Also after I pulled off the 2 slip on plugs it didnt want to charge right. Anyone know how to seal the back of the alt so it doesnt stall everytime I hit a mud hole??? Also anyone know where to get a good higher amp alt for cheap??? My stock 60 amp doesnt do well pushing my electric fans and lights.
Post Fiend
Joined: Jul 2006
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I am thinking that the alternator is not causing the vehicle to die. Your truck should run on the battery if the alternator were to fail.
The alternator just maintians a charge for the battery after the battery has been tasked to start the vehicle.
Are you sure that the dizzy is not getting wet?
Try using a small spry bottle with water to isolate the problem down.
Some of my early engines that were not waterproofed too well would die at the sight of water. After a few techiques to keep water out, I can hit mud and juat about any water any time I want......
The alternator just maintians a charge for the battery after the battery has been tasked to start the vehicle.
Are you sure that the dizzy is not getting wet?
Try using a small spry bottle with water to isolate the problem down.
Some of my early engines that were not waterproofed too well would die at the sight of water. After a few techiques to keep water out, I can hit mud and juat about any water any time I want......
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Joined: May 2006
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From: North Dakota
I swapped a 100 amp alt off a 83 LTD onto mine. Just have to change the connector on the end of the two little wires to fit the new alt. (Off hand field and stator wire. I think) it will work with your current voltage regulator.
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Joined: Dec 2006
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yeah silicone your plug boots to the wires and silicone the wires to the cap and wires to the plugs cap to the dissy (all the ones i have done i left the factory vent on the cap alone and it worked fine) silicone the wire to the coil and basically silicone everything electronic dielectric grease works well too but i have had better luck with silicone till you have to take the stuff off
Post Fiend
Joined: Jun 2002
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From: Atlanta GA
Dist. sits at the front on a 351M? So I would go with your dist. being the problem first, you should have a round coil and it shouldn't be a problem, but, I would try covering it or swapping it out. If you have duraspark, I would check the wires and fill the connector holes.
Your 79 probably has the wires sitting on the driver's side intake manifold, I would see if the wiring is intact and not shorting out.
Is you battery secured? It might be bouncing around and the (+) is hitting something when badly jolted since it is on the fender side.
Your 79 probably has the wires sitting on the driver's side intake manifold, I would see if the wiring is intact and not shorting out.
Is you battery secured? It might be bouncing around and the (+) is hitting something when badly jolted since it is on the fender side.
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Joined: Nov 2007
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From: Naples, FL
sorry to bring up old subject...just getting back to workin on my 79 (been broke as a joke)
anyways it seems to be the alt...i turn off my elec fans and spray motor, plugs, and wires and runs fine but as soon as water splashes back side of alt its dies imediatly.
ALSO ... 75F350 U say 3g alt upgrade...from newer model GM...you done this before???what does it require....never worked on chebbys only ownd fords....maybe a link about 3g upgrade??
OH and by the way nice 350!!! -Edit
anyways it seems to be the alt...i turn off my elec fans and spray motor, plugs, and wires and runs fine but as soon as water splashes back side of alt its dies imediatly.
ALSO ... 75F350 U say 3g alt upgrade...from newer model GM...you done this before???what does it require....never worked on chebbys only ownd fords....maybe a link about 3g upgrade??
OH and by the way nice 350!!! -Edit
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Post Fiend
Joined: Jun 2004
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From: Joppa, Maryland
sorry to bring up old subject...just getting back to workin on my 79 (been broke as a joke)
anyways it seems to be the alt...i turn off my elec fans and spray motor, plugs, and wires and runs fine but as soon as water splashes back side of alt its dies imediatly.
ALSO ... 75F350 U say 3g alt upgrade...from newer model GM...you done this before???what does it require....never worked on chebbys only ownd fords....maybe a link about 3g upgrade??
OH and by the way nice 350!!! -Edit
anyways it seems to be the alt...i turn off my elec fans and spray motor, plugs, and wires and runs fine but as soon as water splashes back side of alt its dies imediatly.
ALSO ... 75F350 U say 3g alt upgrade...from newer model GM...you done this before???what does it require....never worked on chebbys only ownd fords....maybe a link about 3g upgrade??
OH and by the way nice 350!!! -Edit
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