What on earth is a carbon canister?
Discussion
griff2be said: Its not a consumable 'service' item though. What's wrong with it - full of fuel? If you have a warranty it should cover it.
Car is at Thames Valley Racetech - receptionist told me not a warranty item (I have Warranty Holdings cover).
Quite a few things "spotted". Front brakes (fair enough), new wishbones (maybe, it's 4 years old, 24k miles). Plus some stuff I asked to be done.
Still a big OUCH though at the 24k service.
donatien said:
griff2be said: Its not a consumable 'service' item though. What's wrong with it - full of fuel? If you have a warranty it should cover it.
Car is at Thames Valley Racetech - receptionist told me not a warranty item (I have Warranty Holdings cover).
Quite a few things "spotted". Front brakes (fair enough), new wishbones (maybe, it's 4 years old, 24k miles). Plus some stuff I asked to be done.
Still a big OUCH though at the 24k service.
TVRacetech told me that the carbon canister would be covered under warranty when I asked about it. I'd question why it needs replacing and if it is faulty why it is not covered by warranty. Except of course if they have already done the work in which case WH will refuse to pay as it wasn't pre-authorised.
New wishbones - only required if the old ones are very rusty. V easy to see if that is the case. My car is 4 years old, 34k miles, wish bones are immaculate. Depends on how they have been looked after.
A Carbon Can is quite a unique piece of kit.
Its main function is to treat the fuel vapour from the fuel tank. The can removes the hydro carbons from the vapour, and the vapour is then normally sent to the engine where a purge valve allows the vapour to be drawn into the intake manifold where it is burnt inside the cylinder head during the firing stroke of the cylinder.
AT the same time the carbon can should have a pipe leading to the atmosphere through which it draws fresh air, sometimes this pipe can block causing problems, but again only from an emissions stand point.
Carbon cans are NOT serviceable items and should be covered by conventioanl warranties as part of modern car fuel tank systems. But, as they have no moving parts a carbon can should realisticly never need to be replaced, unless a car fails a drive by hydro carbon emissions test. I would question the reason why the carbon can has been replaced, what test did the car fail that indicated the carbon can needed replacing??
edited as I can't spell !!
>> Edited by tvrslag on Saturday 15th February 20:27
Its main function is to treat the fuel vapour from the fuel tank. The can removes the hydro carbons from the vapour, and the vapour is then normally sent to the engine where a purge valve allows the vapour to be drawn into the intake manifold where it is burnt inside the cylinder head during the firing stroke of the cylinder.
AT the same time the carbon can should have a pipe leading to the atmosphere through which it draws fresh air, sometimes this pipe can block causing problems, but again only from an emissions stand point.
Carbon cans are NOT serviceable items and should be covered by conventioanl warranties as part of modern car fuel tank systems. But, as they have no moving parts a carbon can should realisticly never need to be replaced, unless a car fails a drive by hydro carbon emissions test. I would question the reason why the carbon can has been replaced, what test did the car fail that indicated the carbon can needed replacing??
edited as I can't spell !!
>> Edited by tvrslag on Saturday 15th February 20:27
There is a fault code on the ECU which may indicate that the carbon fcan is at fault (sorry - can't remember what it is). This could be beacsue the carbon can isn't venting properly and it fills with fuel. Equally it could be that the breather line between the fuel tank and the carbon can is blocked.
I'm not suggesting that TVRacetech have replaced it without good reason - I'm just questioning the statement that it wasn't a warranty item.
As I say though, if the work has already been done, WH will not pay.
I'm not suggesting that TVRacetech have replaced it without good reason - I'm just questioning the statement that it wasn't a warranty item.
As I say though, if the work has already been done, WH will not pay.
A tip from the 'Chimaera on a shoestring' workshop manual...
Locate fuel cannister (no mean feat, but discussed elsewhere). Disconnect engine and tank pipes from cannister. Attach foot pump to atmospheric pipe (small adapter for inflating lilo's is perfect). Cover both inlets on cannisetr (fingers are perfect for this job. Punp footpump twice. Uncover one inlet. Marvel as petrol shoots from inlet under pressure (it is best not to be smoking at this point). Do this many times with both inlets until petrol no longer flies from cannister. Reconnect all pipes.
Fuel tanks stops banging. MOT passed 8 months later. Job needs doing again now (one year later). Cheaper than new cannister!!
(As with all 'shoestring tips' no warranty is made as to the correctness of this 'fix' and it should be undertaken at your own risk. I have nearly written of cars with shoestring fixes in the past...)
Locate fuel cannister (no mean feat, but discussed elsewhere). Disconnect engine and tank pipes from cannister. Attach foot pump to atmospheric pipe (small adapter for inflating lilo's is perfect). Cover both inlets on cannisetr (fingers are perfect for this job. Punp footpump twice. Uncover one inlet. Marvel as petrol shoots from inlet under pressure (it is best not to be smoking at this point). Do this many times with both inlets until petrol no longer flies from cannister. Reconnect all pipes.
Fuel tanks stops banging. MOT passed 8 months later. Job needs doing again now (one year later). Cheaper than new cannister!!
(As with all 'shoestring tips' no warranty is made as to the correctness of this 'fix' and it should be undertaken at your own risk. I have nearly written of cars with shoestring fixes in the past...)
griff2be said: I'm not suggesting that TVRacetech have replaced it without good reason - I'm just questioning the statement that it wasn't a warranty item.
Just rang them to make that point and yes, it probably is covered. £53 for the unit and £45 labour (1 hour). I know the factory charge labour at £42 per hour so quite competitive. No idea what the "true value" of the canister is though. Still, £100 off a stinger bill of £1200 is a good night out for me and the girly!
Dave
Fat Chap said: Dave,
I would be interested to hear your views on TVRacetech following the service on your Griff. I am near to them and thinking of using them for the 36K service on my Chimeara. Please e-mail me any thoughts / advice etc.
Thanks
Fat Chap
We'll do this off-line yeah? Ted doesn't appreciate opinions on w*nk service here but no hassle if we exchange views via email.
My e-mail is available via my profile, guess yours is too.
Dave
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