Engine: 2.0 Carb B200K/B200F: Solex-Cisac carburettor overhaul

[vlv240]

Hello everybody,

I intend to overhaul the carburettor fitted on my 240DL: a Solex-Cisac.

As this operation hasn't been done for more that 10 years it is a MUST!

The throttle remains stuck from time to time (it's not the cable's fault - I checked it) and it doesn't operate well at higher revs or when accelerating fast.

I have the following in my mind: to buy the following:

- internal fuel filter
- gasket kit (from Volvo);
- repair kit (also OEM)
- all thermistor components

and a few other "bits" and "pieces" and to dismantle it, clean everything, replace the parts mentioned above and to adjust it (with the help of a technician).

If there is anything else I need to know / buy in order to make the carburettor run again pretty well, don't hesitate to tell me.

Thank you!

[Clifford Pope]

From memory this is a two-stage carburettor, the second barrel coming into play at wide throttle openings, controlled by a vacuum valve. I don't think the valve is serviceable if the diaphram is holed. But I do remember that the spring-loaded mechanism was prone to sticking.

[vlv240]

Many thanks for the info Clifford Pope
Therefore, I suppose that it wouldn't be a bad idea to replace the vacuum valve and to clean the spring-loaded mechanism.
Anything else that might be helpful?

[honestjoe]

Hi..I have the same carb as yourself..and although it has never given me any trouble i"m in no doubt that it is tired and running a little rich..I would try to source a second hand carb and refurb that so you always have the original should you run into any problems with the refurbed one..ie tuning/running..you could try carb cleaner to free up sticking throttle..not a lot of us here have this carb anymore due to its mysterious nature and associated pipework that can confuse the most experienced engineer..but i for one would be very interested to see the solex dismantled for a refurb as in time i will have to do this..but at the moment..if it is not broken..well..need i say more..best of luck to you...cheers hj.

[vlv240]

Thanks honestjoe for your advice
I will keep you informed about it.
If I would want to switch to another carburettor, that one would be the Pieburg?

Any other advice regarding the Solex-Cisac carburettor, repair & overhaul is greatly appreciated!

ie: other parts that should be renewed.

[chesters6]

Originally Posted by honestjoe

Hi..I have the same carb as yourself..and although it has never given me any trouble i"m in no doubt that it is tired and running a little rich..I would try to source a second hand carb and refurb that so you always have the original should you run into any problems with the refurbed one..ie tuning/running..you could try carb cleaner to free up sticking throttle..not a lot of us here have this carb anymore due to its mysterious nature and associated pipework that can confuse the most experienced engineer..but i for one would be very interested to see the solex dismantled for a refurb as in time i will have to do this..but at the moment..if it is not broken..well..need i say more..best of luck to you...cheers hj.

i'm in the same predicament ,i darent try and overhaul mine because then living in a small village with no bus and no-one i can cadge a lift off if the project goes tits up i then cant get out for parts.One day another carb will come my way so that can be overhauled instead and swopped over.


it would be nice if a member could list alternative carbs and how to fit them instead of the solex.
ofcourse finding another carb is probably not just a case of bolting it in so the list would need to list everything needed for us handy but inexperienced errr fiddlers

[OldBlueVolvo]

Originally Posted by chesters6

it would be nice if a member could list alternative carbs and how to fit them instead of the solex.
ofcourse finding another carb is probably not just a case of bolting it in so the list would need to list everything needed for us handy but inexperienced errr fiddlers

Webcon sell a Weber conversion kit for the 240DL. It is listed as a Weber DRTM, which I have never heard of.
Steve Curtis has fitted a Weber DMTR to a 240, but I'm not sure what engine it was. This is the conversion kit used on 740s. Notice that one carb is DRTM and the other is DMTR; I've often wondered if this is a misprint though.
These are fixed-jet double barrel down-draught carbs.

http://www.webcon.co.uk/Downloads/20...tor%20kits.pdf

I think they cost at least £250. Probably more now.

It is worth comparing the cost of overhauling your Solex to the cost of buying a brand new Weber.

[Mike_Brace]

Sounds like we need a loan carb scheme! Sadly at present I don't have one.

[vlv240]

Thanks chesters6, OldBlueVolvo.
Both came up with great ideas.
I will go on Monday to check if the gasket set and repair kit is still available for the 240Dl with Solex-Cisac carb

You "read" my thoughts Mike_Brace.
That's exactly what I intended to do next: to ask for a scheme of all internals of the Solex-Cisac carb

[chesters6]

Originally Posted by OldBlueVolvo

Webcon sell a Weber conversion kit for the 240DL. It is listed as a Weber DRTM, which I have never heard of.
Steve Curtis has fitted a Weber DMTR to a 240, but I'm not sure what engine it was. This is the conversion kit used on 740s. Notice that one carb is DRTM and the other is DMTR; I've often wondered if this is a misprint though.
These are fixed-jet double barrel down-draught carbs.

http://www.webcon.co.uk/Downloads/20...tor%20kits.pdf

I think they cost at least £250. Probably more now.

It is worth comparing the cost of overhauling your Solex to the cost of buying a brand new Weber.

i doubt my car is worth £250 unfortunately
but webers are plentiful at boot fairs what else do you need and where do the coloured pipes that run into the solex go when its not a solex?