This guide explains how to eliminate and rationalise the fuel vapour system that sits above the O/S ear. To do this you need to take the clam off. It looks like a worrying job, but is really very easy indeed and the completed job is very simple for the eye to verify.
30 minutes (though you may need several hours to take you clam off).
TOOLS + PARTS
A couple of screwdrivers, a knife and a couple of 10mm spanners/sockets to undo the retaining fixtures for the carbon canister. No extra parts need to be bought.
A = 18mm I/D hose, joins fuel filler neck to vapour exchange (E).
B = 8mm I/D hose, joins roll-over valve © to carbon canister (D)
C = Roll-over valve, allows vapour transit when upright, blocks vapour transit when inverted.
D = Carbon canister.
E = Vapour exchange box (for want of a better term).
F = 3-way joiner with 3 * 8mm hoses off it.
G = 18mm I/D hose that comes up from the tank.
H = 8mm I/D hose that comes up from the tank.
J = 8mm I/D hose that comes up from the tank.
K = 8mm I/D hose, leads from carbon canister to solenoid.
L = Hard pipe that leads from solenoid to inlet manifold (not shown in the pics).
1. Remove and scrap D.
2. Remove and scrap E.
3. Remove and scrap A.
4. Remove and scrap L.
5. Remove and scrap K.
6. Remove and scrap L.
7. Remove and scrap F (and it's 3 short hoses).
7. Keep hose B, feed it down from C to your wheel arch area to vent fuel vapour, maybe extend it.
8. Connect G to the fuel filler neck.
9. Connect H to the bottom of the roll-over valve ©.
10. Now double check all jubilee clips and joints are done up firmly.
11. Maybe fit a gauze filter onto the end of hose B, though in practice I doubt this is vital.
You will be left with 3 pipes coming up from the tank:
1. Hose G, which needs to be attached to the fuel filler neck.
2. Hose J, which needs to be terminated/blocked. I used an 8mm bolt with a non-threaded shank.
3. Hose H, which leads from the tank to the bottom of the roll-over valve ©.
This setup leaves the tank able to vent excess pressure and retains the safety of the roll-over valve just in case you invert the car. The weight saving of the removed parts is about 1.2 Kg. Your car is no longer Euro 4 compliant.
Edited by Nev, 12 July 2019 - 07:11 AM.