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Can someone tell me what size bolt the tensioner pulley bolt is?

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Old 06-09-2013, 10:17 PM
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Car: 92 RS
Engine: 305 TBI
Can someone tell me what size bolt the tensioner pulley bolt is?

So I replaced my tensioner pulley.. I didn't tighten the bolt all the way because when I did, the brand new pulley wouldn't budge when I tried to spin it. I didn't know that's how it's supposed to be, so I loosened it. It ended up falling off while I was driving, along with the metal washer. Luckily, I was only a few blocks from home, and the pulley didn't fall off. I even drove home and the pulley stayed on. I went back and found the big metal washer, but can't find the bolt. I rather not order a whole new tensioner assembly, or make a trip to the junkyard just for a bolt (I've been to the junkyard like 5 times in the past 2 months, there's really nothing more I could possibly need. lol).

Can anyone please take their bolt out real quick and tell me the length of it? I can match the width up obviously, since I have the metal washer.

I have a 305 TBI, 92 RS, if it makes any difference.
Old 06-09-2013, 10:30 PM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Can someone tell me what size bolt the tensioner pulley bolt is?

It would be more than likely metric maybe 12mmx 1.75
Old 06-09-2013, 10:57 PM
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Re: Can someone tell me what size bolt the tensioner pulley bolt is?

It's definitely metric, I remember using a metric socket for it. But where did you get 1.75 from? Did you check it?
Old 06-09-2013, 11:03 PM
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Car: 1967 Camaro, 91 z28
Engine: Lb9
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Axle/Gears: J65 pbr on stock posi 10bolt
Re: Can someone tell me what size bolt the tensioner pulley bolt is?

The idler to bracket is a course thread metric so just a assumption the idler pulley to the bracket would be a corse thread metric as well. Go grab one from a tbi v8 truck at the bone yard.
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