Horn Reconditioning

[gregwils]

I had planned to separate my horn grill which is pretty rusty from the diaphragm to sand and rechrome, but that sucker doesn't want to let go. Is it possible to separate or does is need to go to some type of horn shop? Thanks.

[gregwils]

I got the diaphragm separated from the cover. It was just a little stubborn after 45 years. It seems to have good continuity, so hope just test and rechrome the grill. Also for anyone interested, I found a write up on an old Bosch horn in an early Porsche, it's pretty close to the CEV. http://forums.pelicanparts.com/porsche-911-technical-forum/469086-early-bosch-horn-restoration.html

[Ventodue]

Thanks for posting this. As the write-up says, horns are pretty simple and therefore easy to repair, but ...

I have never been able to find replacement aluminum rivets. And I don't like using self-tappers. If you manage to get some, please say where from - or even better, buy a bunch and I'll buy a few dozen from you!

Cheers

Craig

[gregwils]

Here is the photo I meant to share. The metal is solid despite deteriorating around the screw holes. The paper gaskets were incredibly thin and probably did more to hold moisture than offer any other protection.

PS - Craig - Did you read the Porsche thread, the author suggested aluminum rivets were available at Grainger. I'm not sure if those were the self-tapping type that you did not want.

[Ventodue]

<snip> Craig - Did you read the Porsche thread, the author suggested aluminum rivets were available at Grainger.

Yep, Greg - thanks for that. I did see it, and subsequently found the rivets on the Grainger site. Have to see if they'll ship to me here in France ...

Cheers

Craig

[gregwils]

Let me know if they don't, I could order them and forward to you. My services are free, but can't promise prompt service.

[ajleone]

Ok, dumb question - is the paper gasket required ? If so why and can just a piece of kraft/sjipping paper suffice as a replacement ? Thanks.
Tony

[Ventodue]

Let me know if they don't, I could order them and forward to you. My services are free, but can't promise prompt service.

Thanks Greg. I'll give them a go and see what happens. The important thing is that at least I now know the rivets exist, and are (theoretically) available ...

[Ventodue]

Ok, dumb question - is the paper gasket required ? If so why and can just a piece of kraft/sjipping paper suffice as a replacement ? Thanks.
Tony

I guess the gasket is there to stop the very thing it doesn't stop . Water getting in and corroding the points.

Last time I fixed one, I just used a bit of gasket paper. Next time, I think I'll follow the line of the guy on the Porsche forum - get all modern and use silicone