Carb Hoses

[gab1964]

Hi,

Probably a quick one for you old hands out there.

I've got a hose on a T piece that's been blocked off. Question is, should it be and if not, where would it connect to?

I've attached a photo for reference.

Thanks in advance

[sujitroy]

Could be a carb breather. Does the other end attach to the carb near the top? If so this needs to connect to the other carb and then down the front of the timing cover to air.

[gab1964]

Thanks sujitroy. I've attached another image showing how it was set up before I started working on the car. You can see the pipe in question, lower left.

[sujitroy]

Its the carb breather. I have a Fed. Stag and that open end feeds into a carbon canister, but on UK Stags it runs in front of the timing cover. You'll have to wait for someone else to step in as I don't know the exact route of the pipe.
Sujit

[DJT]

There should be a nylon pipe attached which runs under the air filter box and down the front of the engine. Usually a p-clip securing it to the timing chain cover or the timing quadrant. It ends just about level with the anti-roll bar.

[gab1964]

There should be a nylon pipe attached which runs under the air filter box and down the front of the engine. Usually a p-clip securing it to the timing chain cover or the timing quadrant. It ends just about level with the anti-roll bar.

Thanks Dave,

I'm fairly certain it does. I'll have a closer look this weekend. I'm presuming that if it does the pipe that has the bung should remain that way, blocked off?

Thanks.

[sujitroy]

The pipe should not be blocked off.

[JOHNS]

I think there is some confusion here. Find attached some pictures I took of my engine during my rebuild. This is a one owner car which is absolutely stsndard.

IMG_0004.jpg
IMG_0068.jpg
IMG_0084.jpg

IMG_0085.jpg

[MandM]

yours is running around the back of the carbs, that why someone blocked it off as they didn't know where the other end went, as Dave+ john said it should go down the front of the timing cover

[richardthestag]

Hi Gab1964

Swap the carb end of that pipe over from one side to the other, run the drivers side pipe under the air filter intake elbow and then point the T piece towards the front of the car.

'Merican Stags with strong emission control regs had all manner of carbon filters and stuff that this had to go to. UK stags it was simply an overflow that ran through the engine v towards the front of the engine and then into a rigid plastic pipe that went down the front of the timing cover.

Right up until someone in BL supply chain decided that the stag OE pump should push 6psi, this was perfect. Now however you may find that excess fuel pressure overwhelms the float chamber valve and then the carbs overflow down the front of the engine via these pipes. yes very helpful.

Resolve it by either fitting a fuel pressure regulator to limit the fuel pressure delivered to the carbs to 2-3psi. mine is set at 2.5psi with no issues. Or fit, like I have seen on every other stromberg installation, a small bore return feed back to the fuel tank.

Happy Fridays

[trunt]

Not that complicated…‘Merican Stags had the same arrangement, except both that carb overflow and the vent from the fuel tank (which U.K. vent from the road) go to a carbon canister. The canister is also teed with the cam cover hose so the carbs draw the fumes into the engine.

Minor overflows are collected by the carbon to evaporate and be drawn up by the carbs but a major overflow will still pour out of the bottom outlet of the canister if it swamps the carbon.

Once I understood it I decided to retain the canister, why not? I did however dump the run-on valve arrangement.

[gab1964]

Thank you everyone for your feedback. I'll have a go at it this weekend and let you know the result. Fairly certain I'll be buying some missing bits tho.....