I'm rebuilding a B235 but this part is common to B234, B205, I think any of the 4 cylinder engines. I junked the original block and remember looking at the idler and thinking I'll never need that. Well I stripped the screw on the replacement engine and am in the process of buggering up the entire idler. If you have one laying around I don't need the screw but could use the rest of it. Thanks.