Horn repair?

2 old for this · 11-25-2021, 09:16 PM

Any one have any luck in bringing old Bosch horns back to life? They are the round type on a 444. Any trouble shoot advice?

VolvoLatAm · 11-25-2021, 10:34 PM

horns are $16-40 bucks or so new, add a relay and they are 3x as loud as from the factory--at least mine are. Would not recommend trying to bring old horn tech back to life. You have many (hella) electronic horn options on Amazon

spock345 · 11-26-2021, 01:47 AM

Quote:

Originally Posted by VolvoLatAm

horns are $16-40 bucks or so new, add a relay and they are 3x as loud as from the factory--at least mine are. Would not recommend trying to bring old horn tech back to life. You have many (hella) electronic horn options on Amazon

I think the difficulty may be that the old horns on a 444 are 6 volt. So it may be worth it to refurbish them.

alschnertz · 11-25-2021, 11:48 PM

I was able to disassemble, clean and reassemble the original 6V horns on my 544 easily.
There's nothing to them.
I think I had to tweek the adjustment screw a tiny bit.

The horn sounded great when done.

planetman · 11-26-2021, 02:33 PM

If original, definitely 6v horns.

I've seen some videos on Google showing early Bosch horns being taken apart and cleaned, but we have never tried.

FYI, if needed, the original rubber mounting grommets are still available.

dl242gt · 11-26-2021, 03:59 PM

They used to sell rebuild kits for the Porsche 356 round horn sets at Stoddard a Porsche dealer with a focus on the classic Porsches. I used to get their paper catalogs and shop for my parts there. Those cars were six volt systems, too.

2 old for this · 11-26-2021, 08:26 PM

Thanks for all the tips. Autopsy is required.

2 old for this · 11-27-2021, 08:20 PM

The military teaches if something doesn’t work give it a whack. Both came to life.

dl242gt · 11-27-2021, 11:11 PM

Well done!

11-25-2021, 09:16 PM	#1
2 old for this Board Member Join Date: Mar 2018	Horn repair? Any one have any luck in bringing old Bosch horns back to life? They are the round type on a 444. Any trouble shoot advice?

11-25-2021, 10:34 PM	#2
VolvoLatAm Board Member Join Date: Oct 2019	horns are $16-40 bucks or so new, add a relay and they are 3x as loud as from the factory--at least mine are. Would not recommend trying to bring old horn tech back to life. You have many (hella) electronic horn options on Amazon Last edited by VolvoLatAm; 11-25-2021 at 11:09 PM..

11-25-2021, 11:48 PM	#4
alschnertz Enough already! Join Date: Oct 2009 Location: CT	I was able to disassemble, clean and reassemble the original 6V horns on my 544 easily. There's nothing to them. I think I had to tweek the adjustment screw a tiny bit. The horn sounded great when done. __________________ Differences of opinions should be tolerated, but only if they're not too different. - Sharon Craig

11-26-2021, 02:33 PM	#5
planetman Board Member Join Date: Apr 2012 Location: Torrance, CA	If original, definitely 6v horns. I've seen some videos on Google showing early Bosch horns being taken apart and cleaned, but we have never tried. FYI, if needed, the original rubber mounting grommets are still available. __________________ Eric Hi Performance Automotive Service (formerly OVO or Old Volvos Only) Torrance, CA 90502

11-26-2021, 03:59 PM	#6
dl242gt Old and boxy but good. Join Date: Jun 2002 Location: S NJ, a suburb of Phila.	They used to sell rebuild kits for the Porsche 356 round horn sets at Stoddard a Porsche dealer with a focus on the classic Porsches. I used to get their paper catalogs and shop for my parts there. Those cars were six volt systems, too. __________________ Dave, 1982 242 turbo. 338k miles. MVP coilovers and 3" exhaust. Flowed 405 with a V15. Cossie turbine housing with upgraded compressor housing. 90+, IPD remote oil filter. Some other goodness, too. Been lots of fun over 25 years. Restored in 2k. Now ready for a 2nd restoration. 1993 245 Classic, 435k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47.

11-26-2021, 08:26 PM	#7
2 old for this Board Member Join Date: Mar 2018	Thanks for all the tips. Autopsy is required.

11-27-2021, 08:20 PM	#8
2 old for this Board Member Join Date: Mar 2018	The military teaches if something doesn’t work give it a whack. Both came to life.

11-27-2021, 11:11 PM	#9
dl242gt Old and boxy but good. Join Date: Jun 2002 Location: S NJ, a suburb of Phila.	Well done!

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