Question about 2001 BMW 330
How do you adjust tension on the serpentine belt driving the alternator?
Adjust ur belt by following steps
now that you know where the components are these components are driven by a belt. So when you turn your AC on there’s a belt that’s driving the AC compressor, when you turn the stirring wheel and you have that nice that easy feel of turning the stirring wheel when you’re parallel parking your car that’s the power stirring pump doing its job. Your alternator is keeping the battery charged, the lights on and the engine running. So I want to show you where the belts are, what they look like, how to adjust them and how to tell a bad belt from a good belt. As you can see these are your drive belts, this is the AC drive belt it drives the AC compressor, this is the alternator drive belt it drives the alternator, if you look down here you can see this is where the adjustment is on that AC compressor belt, if you look right here this is the top adjusting bolt for adjusting the alternator either up or down to tighten or loosen the belt. There’s a bolt down here that locks the alternator in place and this bolt is the pivot bolt for the alternator. So if you’re going to let’s say remove your alternator belt you’d have to remove these covers, loosen this bolt, loosen this bolt that’s underneath this cover and adjust this bolt to either lower the alternator or raise the alternator, if you’re belt was too loose you’ll pull up on the alternator, if the belt was too tight you’ll
Posted on Sep 22, 2008
The tensioner is spring loaded, and no adjustment is provided, or required.
But if for some, to me, unfathomable reason, the belt should become loose, causing slippage, I can think of only 3 possible causes:
1. Someone, unknowingly removed and replaced the belt incorrectly, by MISROUTING the belt on the pulleys.
2. Someone, unknowingly replaced the belt with one of the wrong size.
3. One of the belt driven components [water pump, alternator, smog air pump, power steering pump, air conditioning compressor, etc.] has been replaced with a new unit which has a different sized pulley than the one replaced.
4. The tensioning SPRING in the auto tensioning arm has become weak, and if so the arm assembly must be replaced.
As i said earlier, there is no provision for adjustment, as the tensioner arm assembly is supposed to automatically maintain the proper tension.
HOPE MY INFO FIX YOUR PROBLEM.
Thanx for using fixya.
Have a nice day.
Posted on Sep 22, 2008
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Posted on Jan 02, 2017
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