The people that touch their hot alt are the same people who drive a round all day get out the car and grab the exhaust pipe and yell dam that's hot lol👍👀👍
If there no discoloration to enamel on the stator, or smoke pouring out from the diodes in the rectifier, don't worry about it. I had a small case hairpin to 343 degrees for over an hour strait, torture testing it, after being rebuilt into a 180, then reconfigured to 240, and ran at 350+ degrees, also for an hour strait. You could sear a steak on it. No issues at time of testing, or weeks afterwards of using it hard, on the daily. I heard the enamel that insulates the wire can go to 400 or so before charring.. Would take some crazy abuse to get that hot. I had to work at it pretty damn hard to get it above 300.
That’s what I thought when I got a new alternator. the coil pack gets even hotter. I measured mine (old alternator) and to went up to ~290F with the outside at 240F. I’ve also seen specs for a modern regulator and it had three thermal shutdown points selectable 240F, 280F and 300F. The temperature is measured in the regulator region so the coils can get even hotter. for example 3d printed annealed plastic PLA can held up to 350F.
Yes people know that anything on the engine compartment will be hot bit as a technician myself i can tell you that extreme hotter then what you were getting is often a poor ground of the alternator case to the mounting point so it a valid concern when people ask those questions. It's a good habit especially with older vehicles to clean your grounds keeping the resistance to a minimal bc that will cause the alternator to perform poorly and take it out eventually. The more resistance the more amperage it will pull to satisfy what the vcm is requesting.
Damn! To me that is cold. Im saving for one. My stock one already was at 289 at idle. My two audio batteries where very low. I didn't know my breaker tripped noticed my sib started buzzing one day and I shut everything down. Popped hood and seen it was tripped. Long story short got hotter and smelled now im saving to skip the b.s and enjoy. My alternator is on its last good leg 😂
I was wondering the same thing. I just had an OEM alternator rebuilt and it's getting to 260+ degrees just idling with the low beams and AC on with the hood open. I know alternators get hot, but that seems a bit excessive?
Literally just pulled 350°f temp from the outer case on the alt in my 1990 Daytona es 3.0. I only checked it because it started groaning and my voltage dropped. Temp at the shaft is only 135°f. Pretty sure she shorted internally, windings or diodes ECT.
Trying to diagnose rough idle I was looking around noticed my alt was hotter than the engine. It has a high pitch wine with a steth a scope. Still not sure where to go from here, but can't hear it otherwise. No check engine and idles around 13.7 volts.
@@FATHERSOFBASS Sorry, no Nissan applications. Depending on how much wattage/amperage you're needing you can sometimes get away with simply adding an extra battery or 2 to combat the voltage drops.
I replced my alternator because the power wire melted to the bolt but now with my new alternotor the power wire gets really hot after the fuse but before the fuse its cool should i worry?
My alternator was very hot but I didn't have the truck running at all. It was off all night and I had disconnected the batteries for 2 hour charging before connecting again. After 5 minutes from when I reconnected the batteries, I touched the alternator and I couldn't keep my hand on it for more than 3 seconds before it burned like hell. Is that normal? Again I never started the truck AT ALL, just reconnected the fully charged batteries. Shouldn't it only get hot when/after running? Please give me an opinion, I'm buying a new alternator tomorrow. Batteries died on me while truck was running the night before.
It sounds like you have something going on somewhere else in the vehicle or there is a constant parasitic drain in the vehicle. You can always check alternator performance/health with a simple voltage/multimeter. The alternator should see the same voltage as the batteries when the vehicle is off (12.XX) and then be in the 14 volt range when the vehicle is running.
163 degrees you must have just crank that engine up lol. My 400 amp mechman alternator is well over 200. I dont see you replying to anyone that's having the same reading im having.
You just didn't watch the video, did you? If you're well over 200 degrees, its because you're just sitting there with the hood closed/low with little to no airflow on it. Heat is the byproduct of power production. This is basic knowledge.
@@mechmanalternators it was the alternator it was over charging my auxiliary battery which was bad and it burn out one side of the alternator!! Causing it to over heater by over working
Well maybe for a short time, however.... The power has to come from somewhere. The alternator is the sole provider of electrical energy for everything, all the on board draw, as well as battery charging and other additional loads. Without the alternator, you'll have nothing to work with in very short order. Unless you have a massive headway bank, but ya still have to charge it somehow. Every single watt consumed in a vehicle comes from the alt. The most important piece of equipment in the car. Without it, you'll be stranded in short order, never mind the tunes not cranking. I see lots spend thousands on equipment, only to sidestep the main source itself. $700 is nothing compared to all the $ in equipment some have, and in my opinion, a wise investment.
Still need a alt for the lith lith dont power itself yeah you can run it for a bit but your also gonna damage the cells unless your headway cells lovvve charging @14.3
Not even 700, you get the most powerful alternator we make for 549 shipped to your door! 400+ amps, 200+ at idle. I mean, some guys spend $500 on multi distribution blocks that have 6 runs of 0 gauge wire coming from their STOCK alternator. :) ....but that's none of my business.... :)
Well, we like to be able to relate to our customers as best we can. This is a large reason why we do not speak French, Chinese, Japanese, Russian or Swahili. We're just picky like that, eh? 😘
@@mechmanalternators ya but everyone that speaks those different languages all use the same metric system, damn even your own military uses it. So what happened to you guys lost a section of your brian or something?
@@fendtclaas8689 No, we just know how numbers work and don't worry about those that don't, can't. We also like the fact that we aren't taxed to death like other countries. We'll continue to use Fahrenheit so long as we don't get 38% taxed to death.
@@mechmanalternators the problem is you guys will never realize which system is better because your are to proud to change or even at least try the other. Unlike Canada we had the courage to change and we are happy that we did. What we hate the most is when we buy american ****! we have to buy and pack two sets of wrenches and sockets which leaves us cursing at the end of every week from all the wasted time of grabbing the wrong tool.
So the only reason I checked is my alternator failed, I bought a junkyard 145 amp for my silverado. I didn’t have a chance to clean it out in case there was dirt but none the less I hooked it up and started it and within 2 min it was hotter than the old smaller alternator I also get a alternator smell that I never used to get but it charges 13.6-14 on obd2 reading
The people that touch their hot alt are the same people who drive a round all day get out the car and grab the exhaust pipe and yell dam that's hot lol👍👀👍
(((((no comment )))))
If there no discoloration to enamel on the stator, or smoke pouring out from the diodes in the rectifier, don't worry about it.
I had a small case hairpin to 343 degrees for over an hour strait, torture testing it, after being rebuilt into a 180, then reconfigured to 240, and ran at 350+ degrees, also for an hour strait.
You could sear a steak on it. No issues at time of testing, or weeks afterwards of using it hard, on the daily.
I heard the enamel that insulates the wire can go to 400 or so before charring..
Would take some crazy abuse to get that hot. I had to work at it pretty damn hard to get it above 300.
Can't wait to get one of these alternator! Been grounding and bonding my truck. While I save up. Not car audio but ham radio and going QRO!
When your temp gauge reads 180-200 degrees, who would expect the alt to be cool? This isn’t rocket science. 😂
Don't make me answer that!!!!!
@@mechmanalternators 🤣
So true. In Texas nothing is cool under the hood after 10 minutes running lol
Check the collant level in your alternator folks. You may be low on fluid. It's just like checking your blinkers
That’s what I thought when I got a new alternator.
the coil pack gets even hotter. I measured mine (old alternator) and to went up to ~290F with the outside at 240F. I’ve also seen specs for a modern regulator and it had three thermal shutdown points selectable 240F, 280F and 300F. The temperature is measured in the regulator region so the coils can get even hotter.
for example 3d printed annealed plastic PLA can held up to 350F.
Yes people know that anything on the engine compartment will be hot bit as a technician myself i can tell you that extreme hotter then what you were getting is often a poor ground of the alternator case to the mounting point so it a valid concern when people ask those questions. It's a good habit especially with older vehicles to clean your grounds keeping the resistance to a minimal bc that will cause the alternator to perform poorly and take it out eventually. The more resistance the more amperage it will pull to satisfy what the vcm is requesting.
Thank you!
Damn! To me that is cold. Im saving for one. My stock one already was at 289 at idle. My two audio batteries where very low. I didn't know my breaker tripped noticed my sib started buzzing one day and I shut everything down. Popped hood and seen it was tripped. Long story short got hotter and smelled now im saving to skip the b.s and enjoy. My alternator is on its last good leg 😂
At what point is it a problem? my alternator was running at 250 ish degrees after running for 10 minutes.
I was wondering the same thing. I just had an OEM alternator rebuilt and it's getting to 260+ degrees just idling with the low beams and AC on with the hood open. I know alternators get hot, but that seems a bit excessive?
Literally just pulled 350°f temp from the outer case on the alt in my 1990 Daytona es 3.0. I only checked it because it started groaning and my voltage dropped. Temp at the shaft is only 135°f. Pretty sure she shorted internally, windings or diodes ECT.
You made my day bro💯
Just keepin' it real. :)
Trying to diagnose rough idle I was looking around noticed my alt was hotter than the engine. It has a high pitch wine with a steth a scope. Still not sure where to go from here, but can't hear it otherwise. No check engine and idles around 13.7 volts.
Thanks for this? People forget we are still cavemen under the hood😊
Question. Alternator starts getting really hot with truck off. Any ideas? I am thinking it needs a diode?
Welp…. Dam newbeeeees
Wat about the battery light tho ?
What about it?
Yeah should i evan be worried when my alternator overheats before the motor is even warm at idle by the way.
What is "overheating"? Work = Creates heat
Excuse me sir do you guys make a alt for a 2003 exterra? And if you do do you know where I can find a double alt bracket as well
I am a longtime mechman owner and supporter if you do not can you stear me in the right direction please?
@@FATHERSOFBASS Sorry, no Nissan applications. Depending on how much wattage/amperage you're needing you can sometimes get away with simply adding an extra battery or 2 to combat the voltage drops.
I replced my alternator because the power wire melted to the bolt but now with my new alternotor the power wire gets really hot after the fuse but before the fuse its cool should i worry?
Should i worry about it melting again because and getting hot to the touch or is that fine after the fuse
Sounds like you may have some resistance at your fuse terminal. If it’s a cheap fuse or fuse holder replace it
Hilarious video
My alternator was very hot but I didn't have the truck running at all. It was off all night and I had disconnected the batteries for 2 hour charging before connecting again. After 5 minutes from when I reconnected the batteries, I touched the alternator and I couldn't keep my hand on it for more than 3 seconds before it burned like hell. Is that normal? Again I never started the truck AT ALL, just reconnected the fully charged batteries. Shouldn't it only get hot when/after running? Please give me an opinion, I'm buying a new alternator tomorrow. Batteries died on me while truck was running the night before.
It sounds like you have something going on somewhere else in the vehicle or there is a constant parasitic drain in the vehicle.
You can always check alternator performance/health with a simple voltage/multimeter. The alternator should see the same voltage as the batteries when the vehicle is off (12.XX) and then be in the 14 volt range when the vehicle is running.
160 DEGRES FARENHEIGTH IS COLD.
I js pulled mines out tha garage let it run for 10min and u cant touch it thnk i got a bad one
Well, if you have a bad/semi bad or low voltage battery, the alternator is having a coronary trying to charge it.
163 degrees you must have just crank that engine up lol. My 400 amp mechman alternator is well over 200. I dont see you replying to anyone that's having the same reading im having.
You just didn't watch the video, did you?
If you're well over 200 degrees, its because you're just sitting there with the hood closed/low with little to no airflow on it.
Heat is the byproduct of power production. This is basic knowledge.
What if you just starting your car up and in 5 minute it’s hott
Then you probably have alot more problems goin on than an alternator.
@@mechmanalternators it was the alternator it was over charging my auxiliary battery which was bad and it burn out one side of the alternator!! Causing it to over heater by over working
@@jayjb833 So it was the battery....NOT the alternator. Good to know.
Good video . Thanks
What would cause an ac delco alternator to get super hot within a minute of cranking up? And it's on an old tractor.
literally anything
Mine does the same and starts jumping voltage to 18v
Ok but seriously when you shine that something that's trying it doesn't give you the correct temperature.
Uhhh, what?
I would like a mechman but for the price headway lithium is a better choice for me.
Sometimes it is, can't lie about that.
Well maybe for a short time, however.... The power has to come from somewhere. The alternator is the sole provider of electrical energy for everything, all the on board draw, as well as battery charging and other additional loads.
Without the alternator, you'll have nothing to work with in very short order. Unless you have a massive headway bank, but ya still have to charge it somehow.
Every single watt consumed in a vehicle comes from the alt.
The most important piece of equipment in the car. Without it, you'll be stranded in short order, never mind the tunes not cranking.
I see lots spend thousands on equipment, only to sidestep the main source itself. $700 is nothing compared to all the $ in equipment some have, and in my opinion, a wise investment.
Still need a alt for the lith lith dont power itself yeah you can run it for a bit but your also gonna damage the cells unless your headway cells lovvve charging @14.3
Not even 700, you get the most powerful alternator we make for 549 shipped to your door! 400+ amps, 200+ at idle. I mean, some guys spend $500 on multi distribution blocks that have 6 runs of 0 gauge wire coming from their STOCK alternator. :) ....but that's none of my business.... :)
Just buy the alt first. I love my mechman alt. I may need to buy a second one soon too adding another 8k.
You making no sense brother . It’s got a bad rectifier 😂
Naaaa....just the pulley nut was on too tight! :)
Are these alts hot rated?
Yes
Mine is 200 degrees
Who the **** uses farinhight that doesn't even make sense. Like "160" and or "170" like shutup. Why use such a big number for no dman reason.
Well, we like to be able to relate to our customers as best we can. This is a large reason why we do not speak French, Chinese, Japanese, Russian or Swahili.
We're just picky like that, eh? 😘
@@mechmanalternators ya but everyone that speaks those different languages all use the same metric system, damn even your own military uses it. So what happened to you guys lost a section of your brian or something?
@@fendtclaas8689 No, we just know how numbers work and don't worry about those that don't, can't.
We also like the fact that we aren't taxed to death like other countries. We'll continue to use Fahrenheit so long as we don't get 38% taxed to death.
@@mechmanalternators the problem is you guys will never realize which system is better because your are to proud to change or even at least try the other. Unlike Canada we had the courage to change and we are happy that we did. What we hate the most is when we buy american ****! we have to buy and pack two sets of wrenches and sockets which leaves us cursing at the end of every week from all the wasted time of grabbing the wrong tool.
@@fendtclaas8689 Have you noticed....we don't import or need much from Canada? :)
There is a reason for that.
So the only reason I checked is my alternator failed, I bought a junkyard 145 amp for my silverado. I didn’t have a chance to clean it out in case there was dirt but none the less I hooked it up and started it and within 2 min it was hotter than the old smaller alternator I also get a alternator smell that I never used to get but it charges 13.6-14 on obd2 reading