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Posted by: mobymutt May 25 2018, 04:36 PM

On-going alternator belt issue...

Put my old belt back on (shorter than my new belt that kept falling off, hmmm), but I am still having a massively hard time tensioning it! I can't really yank on the pulley very hard, and certainly can't tighten the screws while doing that. I don't see a jack screw anywhere.

So what's the trick?

Posted by: Cairo94507 May 25 2018, 05:07 PM

I could be wrong, but I think it is shims on the pulley.

Posted by: rhodyguy May 25 2018, 05:20 PM

It's possible the bottom bracket or the arm the alt slides along are broken at the attachments points. I had a chirp when the engine was running and the alt belt would go loose immediately. Iirc it was the bottom bracket.

Posted by: Cairo94507 May 25 2018, 05:26 PM

OOOPPPS, 4 cylinder car. Sorry.

Posted by: mobymutt May 25 2018, 06:06 PM

QUOTE(rhodyguy @ May 25 2018, 07:20 PM)

It's possible the bottom bracket or the arm the alt slides along are broken at the attachments points. I had a chirp when the engine was running and the alt belt would go loose immediately. Iirc it was the bottom bracket.

I think those are ok, I just can't figure out how to pull the belt tight.

Posted by: Mark Henry May 25 2018, 08:32 PM

Did you also loosen the pivot bolt?
I've had to get under the car and pry the alt back and forth a few times to loosen it enough to slide easy.

Don't loosen the adjuster bolt too much, it's a bitch to get back in.

Posted by: cuddy_k May 25 2018, 10:10 PM

As Mark said, first make sure the pivot bolt is loose enough to allow the alt to easily move. Then remove the plastic oval cover facing you, stick a long screwdriver or socket exctension in the hole and lever it against the alt while you tighten the adjuster.

Posted by: mobymutt May 27 2018, 08:34 AM

QUOTE(cuddy_k @ May 26 2018, 12:10 AM)

As Mark said, first make sure the pivot bolt is loose enough to allow the alt to easily move. Then remove the plastic oval cover facing you, stick a long screwdriver or socket exctension in the hole and lever it against the alt while you tighten the adjuster.

To be clear, I am levering against the slot in the tin? Seems a bit iffy, but I'll give it a go!

Posted by: Dave_Darling May 27 2018, 05:52 PM

Do not lever against the engine tin unless you want to bend it.

There are two plastic covers over two slots in the engine tin; one on front and one on the side. The front one covers up the pinch bolt. The side one lets you push down on the outer ear of the alternator where the pinch bolt threads in. So that's what you do, use a screwdriver or a socket extension or something to push the outer end down while tightening the pinch bolt through the other slot.

--DD

Posted by: mobymutt May 27 2018, 06:18 PM

QUOTE(Dave_Darling @ May 27 2018, 07:52 PM)