Aircooled Engine, Diesel Instruments. DOPS.

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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby AngeloEvs » 08 Feb 2018, 21:08

Here is my petrol DOPs


Imagedops by Angelo Evans, on Flickr
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby Andyroo » 08 Feb 2018, 22:25

Ok. It looks to have the same components as mine. I will check them properly over the weekend, but perhaps we both have petrol versions.

Thanks for your picture.
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby AngeloEvs » 09 Feb 2018, 09:25

As I said, it was a long time since I compared Diesel and Petrol DOPs. Apart from the differences of the signal pulse, a petrol engine provides two pulses per engine revolution but a Diesel may be different as one signal pulse is derived from one revolution of the Alternator and relative pulley diameters come into the equation. I would say yours is a petrol DOPs and not the original Diesel one.
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby ZsZ » 09 Feb 2018, 17:35

here is my buzzer. Its form a 9.93 marked (replacement part?) speedo with white back and AFAIK its petrol, but not sure:

Image

Image

Image
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby AngeloEvs » 09 Feb 2018, 17:45

Aah, that looks like the Diesel DOPs, pretty sure it has a crystal oscillator, anyway it is different to the other pics posted. Thanks, very helpful.
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby ZsZ » 09 Feb 2018, 17:58

A friend of mine sent me this pic a few days ago. These are his 3 DOP from his 3 spare speedos. The right one is similar to mine. The buzzer relay is damaged in the left one. He said all 3 was removed from diesel dash but except the damaged one all was buzzing in high rpms on his diesel.

Image

E D I T: checked ETKA, there were 5 partnrs for these circuit boards:
321 919 064 M - petrol
251 919 064 A - diesel - I 2,75 (up to chassis nr 24-K-030 000)
251 919 064 D - diesel - I 2,75 (from chassis nr 24-K-030 001)
251 919 064 B - diesel - I 2,01 - for vehicles with air condit.; for vehicles with air condit. and power steering; for vehicles with hydraulic pump and 2. alternator
251 919 064 C - diesel - I 2,39 - for models with power steering

not sure if there is any sign of the partnr on the circuit board
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby Andyroo » 09 Feb 2018, 21:38

I can't see any pictures? :(
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby AngeloEvs » 09 Feb 2018, 21:50

Picture of Diesel DOPs is a two posts back.
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby Andyroo » 11 Feb 2018, 18:53

Yeah, I can't see any of the images uploaded by ZsZ. Not sure why. I've tried on three different devices.
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby ZsZ » 11 Feb 2018, 19:23

Andyroo wrote:Yeah, I can't see any of the images uploaded by ZsZ. Not sure why. I've tried on three different devices.


I uploaded to my google photos shared album and copied the URLs from there. Maybe a google account is needed
Here are the pics in a shared album:
https://photos.app.goo.gl/27OwsaNk2VzgdTtq1
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby Andyroo » 11 Feb 2018, 21:33

Thanks, that link worked for me.
I can now see the difference that AngeloEvs was talking about. It looks like mine is definitely a petrol version.

I've made a drawing of my circuit board.

DOPS Circuit.JPG
DOPS Circuit.JPG (65.83 KiB) Viewed 267 times


I need to add values for the components.
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby ZsZ » 12 Feb 2018, 07:31

Here is an arcticle about the system and a vid about how to disable the buzzer in the 2.1: https://www.vanagain.com/troubleshoot-t ... nd-buzzer/

In that vid the circuit board has the oscillator (? Shiny metal thingy :) ) So I still think that in my white speedo there is a petrol board.
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby Andyroo » 14 Feb 2018, 14:56

Thanks for the link. I've not come across them before.
So are you saying that the board pictured in the video is for a petrol or a diesel?
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby ZsZ » 14 Feb 2018, 15:52

Andyroo wrote:Thanks for the link. I've not come across them before.
So are you saying that the board pictured in the video is for a petrol or a diesel?


Not sure as the front of the cluster is not visible to decide if it has glow cycle indicator LED. Its from a syncro as the speedo is marked "800" and the video is from the US where diesel syncros werent sold.
My spare DOP (which is similar to the one in the vid) is form a cluster which was a petrol one but later was converted to diesel by soldering in a resistor for glow plug LED and had a Mazda diesel tach hacked into.

Maybe the PO of my cluster did a full petrol to diesel conversion by changing the DOP too and the cluster in the video is from an imported diesel syncro van, or both are petrol DOPs
Both possible.
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Re: Aircooled Engine, Diesel Instruments. DOPS.

Postby ZsZ » 14 Feb 2018, 16:15

Found this:
https://www.ebay.com/itm/Genuine-Volksw ... c3&vxp=mtr
Image
its a DOP that looks like mine and the one in the video. They say the partnr is 321919064N
I did some ETKA search again and found two more partnrs:
321 919 064 J - control unit for oil pressure control for models with a speedometer in die cast optic
321 919 064 N - control unit for oil pressure control for models with a speedometer in plastic optic
both for diesel and turbodiesels from chassis nr F 24-F-000 001
the second one is listed at Caddy, Golf, Jetta, Vento, Passat and always as a diesel.

So it looks like AngeloEvs is right, the one with the oscillator is the one for diesels.

:ok
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