Alternator very hot ! - Page 2 - Club Touareg Forums
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post #11 of 13 Old 1 Week Ago
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Originally Posted by Gnits View Post
Couldn't it possibly be that some bearing has worn out in it and it's close to seizing, and that's why it's overheating (ie. because of friction heat)? I don't think it should overheat just because it's under load for an extended period of time.
A bearing issue would also be present when they "disconnect" it from the load as per above.... unless he meant that they actually removed the belt drive off it, not just the electrical load.

If it's the electrical load we are talking about, I'd suspect some short in the system that is causing some massive amp draw.... probably in a main supply wire that's not fused and is shorted out on the frame\engine, etc. Check your power feed to your fuse blocks or anything else that some butcher might've "hard wired" directly to the battery\alternator without using a relay\fuse, etc.

Any custom additions? Lightbars, fogs, winches, etc?
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post #12 of 13 Old 1 Week Ago Thread Starter
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No visible mods. The aternator runs cool when still connected mechanically and running with the belt but warms up fast when connected to the load. That's why we suspect the load. But maybe 60c is not that high. Let's see how we figure it out this weekend. Anyone with a v6 petrol to try. Engine cold, fire it up, give it a minute the check alternator the temp or touch it. Don't burn yourself


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post #13 of 13 Old 1 Week Ago
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While I don't know what temp the alternator should be running right after engine start, 60c is not too hot for a water cooled alternator. How hot is it going to be running when the engine coolant is at full temp? The coolant thermostat is 90-95c

So, the alternator can handle 60c temp. The only question is should it be that hot, that soon after start?
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