There is a rubber [neoprene] thing in there, but if you think paraffin is going to harm it much with what it has lived with for X number of years then don't do it.

I've trashed enough rubbery bits by shoving 'em through a parts washer to be very wary... A quick once-over outside'll get it looking pretty without any harm, but that's not going to make it work again if it's all clagged internally.

This looks like a good idea, so you can clean or replace the rubber part instead of buying new every few years.

That looks good.

However you won't damage a gunky [or sausaged] oil stack by cleaning it in paraffin, it will just be a lot cleaner.

have a few more pictures.





maybe babelfish can help here Neil?

http://www.pp-2cv.be/FR/News/info%20tec ... ard%20.htm

The two rubbers (clapet) keep the pressure going the right way, acting as one-way valves - but over time they get knackered, weak and deformed.



Cleaning the outside won't do a thing about that. If paraffin or any kind of solvent gets to the rubber, it very likely will. But not a good thing.

Will that be the "rubber" thats been subjected to unburnt petrol, and crank case gases for many thousands of miles.

Paul, MVTech Cert, FIMI

By rubber, do you mean disintegrated carbon deposit?

right then, the 'bath' was actually more of a bidet meaning i've not submerged it.

afaik it was/is working ok. i've cleaned the outside & it looks like this:







Neil

Sorry for the sarcasm, but unless you are replacing it, then washing it in paraffin will get an awful lot of muck out from the inside. The material is not actualy rubber. It is designed to operate at high temperatures in a very hostile environment of unburnt gases. Provided the "rubber" isn't beyond redemption it wont be harmed in the process. The qualifications by the way are real.