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Alternator Belts Wearing Out @ 8000kms!

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#1 Grasshopper2Ant


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Posted 19 April 2020 - 09:06 PM

Have ongoing issue. This is 5th or 6th belt.

Using Bando brand belt / 4PK 820.

Some made in USA or Japan, 3 grooves.

Replaced the alternator pulley to see if it made a difference, no change.

Was going to replace water pump pulley with built-in pulley but could not

easily remove 4 bolts on pulley.

Any ideas what is causing and what belt part number is everyone else

Using. Thanks for any info guys!!

#2 Ga tom

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Posted 20 April 2020 - 05:05 PM

I've found the Blueprint brand ok ADT39622 4 ribs 820mm long .What you could try to see if the pullys are lining up correctly remove the belt, either try eyeing up look at the outer edges of the pully wheels from water pump to alternator and then water pump to lower pully wheel ,or try a straight edge metal ruler or something long enough across the faces of the pullys and check if there are any gaps between the ruler and the faces of the pullys waterpump to alternator. Do you have trouble with the power steering belt ? If not then the bottom pully to power steering are in alignment so it must be one of the other pullys are out of alignment probably the alternator maybe a washer in the wrong place the body of the alternator should be against the fixing point with no washers in between

#3 Grasshopper2Ant


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Posted 20 April 2020 - 07:40 PM

Ga tom, some good points.

Did not do the straight edge. No problem with the PS belt.

No washer used on the alternator top or bottom bolts.

With belt installed I started engine and looked at belts running from

underneath with car on jack stands.

Both belts looked to run straight and true. No wobble or loose.

I get belt particles/dust from the belt being ground thinner.

Like to try a different belt next time as well as pump pulley.

I even filed the pump pulley a bit to dull it.

Some more belt options would be helpful, thanks.

#4 AndrewC


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Posted 20 April 2020 - 09:11 PM

How tight are you tensioning the belt?   Are the pulley grooves perfectly clean?   Any damage to the pulley shoulders?   Are the three pulleys perfectly in line?

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