Charcoal cannister replacement schedule?
#1
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Did not found any answer on this question with a quick advanced search, however I admit that I have not looked into the WSM on this yet (I'm being lazy today
) - anybody knows?
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#3
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They do get somewhat heavier after 20 years (Maybe dust and dirt via the 'vent' breather port?), but I've never seen a service interval for the canister.
#5
#6
Three Wheelin'
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Unless you constantly top up your gas tank to cram in every last drop of gas, they should last the life of the car. If you eliminate the approx. 12% air pocket inside the fuel tank designed to vent the fuel tank vapors to the charcoal cannister by topping up, liquid fuel can fill the cannister up. There is a liquid separator in the EVAP system though, but not for lots of liquid fuel.
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#8
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Thanks Brutus, Rob, Tom and 17prospective buyer for your reply answers.
The reason why I asked this question to begin with is as per the following (as a picture tells usually more than a thousand words):
![Name: IMG_2796-0.1.jpg
Views: 64
Size: 64.4 KB](https://rennlist.com/forums/attachments/928-forum/620613d1333218028-charcoal-cannister-replacement-schedule-img_2796-0.1.jpg)
I.e. due to the current ongoing overall car repairs (as ongoing after my accident from a while ago, once my insurance had agreed on full repair and a good place was found and approved by me) these kind of items are suddenly having amazingly easy access (I know: very dangerous slippery slope of a different kind of WYAIT...
).
@ 17prospective buyer: as per Brutus question, can you please further explain?
The reason why I asked this question to begin with is as per the following (as a picture tells usually more than a thousand words):
![Name: IMG_2796-0.1.jpg
Views: 64
Size: 64.4 KB](https://rennlist.com/forums/attachments/928-forum/620613d1333218028-charcoal-cannister-replacement-schedule-img_2796-0.1.jpg)
I.e. due to the current ongoing overall car repairs (as ongoing after my accident from a while ago, once my insurance had agreed on full repair and a good place was found and approved by me) these kind of items are suddenly having amazingly easy access (I know: very dangerous slippery slope of a different kind of WYAIT...
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
@ 17prospective buyer: as per Brutus question, can you please further explain?
#9
Three Wheelin'
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There is a vapor separator located at the top of the fuel tank (the highest point in the fuel tank), it collects fuel and redirects it to the tank, but it is not designed to be constantly flooded with fuel. When liquid enters the vapor separator it lifts a float which then seals the passage to the charcoal cannister, when the fuel is drained, a return spring lowers the float and the vapor passage is open.
#10
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Ah theoretical not based on how a 928 is set up. The good sized liquid overflow tank (looks like a bed pan) serves that function. It is above the right rear wheel and set up to drain back into the tank. The vapor recovery is plumbed into this as well, also fuel tank air intake and the 928 fuel cap is sealed.