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Author Topic: Prewar 320 W142 Starter  (Read 1906 times)

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Offline icanfixit

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Prewar 320 W142 Starter
« on: November 03, 2013, 02:11:37 PM »
I am looking for information on the starter. I am not sure if we have the correct starter for the car. The number on the starter is BJH  14/12  R3.
About 5 years ago my father loaned out the starter as well as the carb to someone else who was working on another 320. The parts came back but just sat inside the car without being reinstalled. We could have gotten the wrong starter back.

I went yesterday to put the starter back in the car. The starter seems to not match the hole. I expect it to seat back further inside the hole. The gap between the starter and the engine block looks wrong. There is a large locating hole on the block that is larger than the bushing on the nose of the starter. Right now the starter seems to only sit in the cradle. The strap that secures the starter will flip up if I tighten it too much.

The screwdriver in the photo will show how far back it sits from the block.

is there a parts book for the car? I have yet to find one.

Chris

Offline John Ellis

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Re: Prewar 320 W142 Starter
« Reply #1 on: November 03, 2013, 04:18:27 PM »
According to the Bosch parts list for your car (attached below),  you should have a Bosch model BJH 1.4/12 RS19 starter.  The "R" numbers in the part number sequence are the important ones, they signify the fit to an engine (i.e. number of teeth, end configuration, etc.)

« Last Edit: November 03, 2013, 04:39:38 PM by John Ellis »
John Ellis
1953 170Vb
1958 190
2007 Porsche Cayman

Offline icanfixit

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Re: Prewar 320 W142 Starter
« Reply #2 on: November 03, 2013, 06:04:35 PM »
Thanks for the help. I noticed that the listing is for a 3.5 engine. Do you have any listing for the 4.2 engine? 1939 or 1940


Thanks
Chris

Offline John Ellis

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Re: Prewar 320 W142 Starter
« Reply #3 on: November 03, 2013, 07:24:07 PM »
Didn't know that the 320 W142 was available with a 4.2 liter engine.  What other cars used this engine .... maybe I can find it that way?
John Ellis
1953 170Vb
1958 190
2007 Porsche Cayman

Offline Henry Magno

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Re: Prewar 320 W142 Starter
« Reply #4 on: November 03, 2013, 08:15:05 PM »
320 engines are either 3.2 and 3.4, 3.405 to be exact, which for some reason Bosch has rounded up to 3.5. See the box below the header. Looks like you did get the wrong starter back. I'd try and track down the person who you loaned the starter to.

Offline icanfixit

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Re: Prewar 320 W142 Starter
« Reply #5 on: November 03, 2013, 10:04:58 PM »
I wish I could track them down. My dad loaned the starter out so long ago. The other 320 was sold and went overseas from the last report. I just have to make the best of things now. Finding the correct starter will be interesting. There is one on ebay but the price is, well that is more money then I want to think about for a starter. I would love to trade mine for what I need.

Thanks for the help
Chris


Offline Henry Magno

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Re: Prewar 320 W142 Starter
« Reply #6 on: November 04, 2013, 07:48:19 AM »
Would you be willing to post the ebay listing number for that starter?

When I have time I can try and figure out what parts interchange from yours to the correct one to see what would have to be done to get it to work. If you want to send the starter to me I could compare it with my own. I may be able to source some parts for the starter but not too much is available.

My shop overhauls starters and generators and have worked on BJH starters in the past.

Offline icanfixit

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Re: Prewar 320 W142 Starter
« Reply #7 on: November 04, 2013, 10:02:16 AM »
http://www.ebay.com/itm/Bosch-Anlasser-Starter-BJH-1-4-12-RS-19-Horch-Mercedes-u-m-/370678418074?pt=DE_Autoteile&hash=item564e27ca9a

This is the auction that matches the parts number. The main problem so far is that the nose piece is not fitting into the block. The gear is something I have not gotten to yet.

Chris

Offline CraigS

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Re: Prewar 320 W142 Starter
« Reply #8 on: November 04, 2013, 05:22:56 PM »
Should there be a spacer ?

Offline icanfixit

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Re: Prewar 320 W142 Starter
« Reply #9 on: November 04, 2013, 05:32:22 PM »
The nose of the starter should match the locating ring in the photo and set in till the starter outer diameter seats to the block. I have considered making a spacer to center the starter but the unit would be too far back and not make good contact on the ring. I am also not sure if the teeth are correct on the drive gear.


To use this one I would need more info.