The Rochester Cylinder Solved..........Almost

B14, B172, B19/200, D16 engine, ignition, cooling, fuel & exhaust system, gearbox, variomatic, final drive... | Tuning: engine swaps, welded diff, clutch upgrades...
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Cliché Guevara
Posts: 122
Joined: 22 Jan 2012 05:51 am

The Rochester Cylinder Solved..........Almost

Post by Cliché Guevara » 10 Jun 2013 09:53 am

Ok on a couple of other threads I have sm6 sm6 sm6 'd about this damn black cylinder that has ROCHESTER MADE IN USA written on it.It had been suggested that it was the flame trap,however that turned out to be wrong.

sm9 ITS THE CARBON FILTER sm9

Now can someone please explain to me what it does and can I do away with it sm14

Thanks Steve

Logan360
Posts: 848
Joined: 23 Jun 2012 08:51 am

Re: The Rochester Cylinder Solved..........Almost

Post by Logan360 » 10 Jun 2013 09:58 am

They have these???!. wow! Most skyline guys rip them out. i was going to on my skyline but it did't bother me.
Own:
86 360GLT
97 S90
92 960S, Royal
01 Subaru Lancaster 6
96 Volvo 854R

Owned
E90 320 M-sport wagon
S60T -Mazda Familia
850lpt -AU Falcon
855T5 -91, 95, 97 960
940TIC -Mitsi GTO TT
16x 360-Toyota corolla
Toyota corona-R32 Skyline
V70R -V70T5

Cliché Guevara
Posts: 122
Joined: 22 Jan 2012 05:51 am

Re: The Rochester Cylinder Solved..........Almost

Post by Cliché Guevara » 10 Jun 2013 10:34 am

Ha Ha Ha no "they" dont.Only my one.I've no idea what it does if anything at all.

Logan360
Posts: 848
Joined: 23 Jun 2012 08:51 am

Re: The Rochester Cylinder Solved..........Almost

Post by Logan360 » 10 Jun 2013 12:10 pm

Follow the pipes. on a RB series Nissan motor 2 outlet's go to intake plenum and the in's come from possibly fuel tank???
Own:
86 360GLT
97 S90
92 960S, Royal
01 Subaru Lancaster 6
96 Volvo 854R

Owned
E90 320 M-sport wagon
S60T -Mazda Familia
850lpt -AU Falcon
855T5 -91, 95, 97 960
940TIC -Mitsi GTO TT
16x 360-Toyota corolla
Toyota corona-R32 Skyline
V70R -V70T5

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: The Rochester Cylinder Solved..........Almost

Post by Ride_on » 10 Jun 2013 06:59 pm

940s have these, massive things. Haynes has an explanation.

-Fuel vapour absorbtion from the sealed fuel tank
-Vaccum operated valve opens under load and sucks vapours into the engine.
-tank is basically vented into the engine with this canister as a buffer.

To remove, I suggest joining or closing off the breather system that leads to it, depending on the routing and pipe sharing. Then you need to arrange tank venting which I can't say exactly how to do. In the UK 300s there are 2 pipes that lead to the fuel filler neck and, I think, one that leads to the rear cross brace (open end inside it), seems to be connected to the filler neck via a 1 way valve. The filler end has a small hole that is open to the atmostphere via the unsealed outer part of the cap (sealed part is the narrower O-ring seal).

Anyway thats about as far as I've got with it. You might have a different filler cap/end or something annoying like that.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

Cliché Guevara
Posts: 122
Joined: 22 Jan 2012 05:51 am

Re: The Rochester Cylinder Solved..........Almost

Post by Cliché Guevara » 10 Jun 2013 10:50 pm

Now that makes a lot of sense.I remember now that when I removed a white 3 or 4 mm pipe from it it smelled of fuel.I blew down it and asked one of the kids if he could hear bubbles from the tank,he coudn't.But also whilst doing something else at the back of the car I noticed a white 3 or 4 mm pipe pushed into a rubber fuel line.The fuel line was badly perrished.If I fill the tank to the max it leaks,so I put the bad pipe on my to do list.My donor car does not have this carbon filter arrangement so I will see what can be done.I was concerened that it might feck with the injection system but it just seems to be one of those Yankee Doodle ideas to make the world a greener place.Also the donor car does have a different filler cap,I'll check to see if the filler neck is different too.

Thank you ever so much for clearing that one up for me sm4

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