what to do?

thamesroverp6

thamesroverp6

Member
Hi there , not sure what to do here, i do not have the two hoses for the flame arrestor (if thats what it is called) on the left bank and seems hard to find some from a supplier.
Can anyone suggest what i could do?
Can one fit a filter to the rocker cover outlet and blank off the carbies pipe?
emissions are not an issue in NZ , but would look odd as rh bank is all there, Thanks Karl
 
Hi, Not really because it works by using inlet manifold depression to suck the fumes/pressure out of the crankcase. You could try it but it depends on the state of the engine and you may end up with oil misting over the rocker cover.

Colin
 
colnerov said:
it works by using inlet manifold depression to suck the fumes/pressure out of the crankcase
Click to expand...
The openings in the rocker covers are to let the crankcase breath and get rid of internal pressure (saves blowing out gaskets). The flame arrestor stops the passage of a flame. They don't need to be connect to the manifold to make them work.
They are connected to the inlet, so the gasses expelled by the engine put into the inlet and burnt. This was done to met emission standards. The engine will be fine if you block off the carb fittings and let the engine breath to the atmosphere through a filter. If your engine is pushing an oily mist out of the breathers, and this is feed into the combustion this can cause combustion problems.
To save me a lot of typing and stopping the risk of me entering rant mode, have a read of this: Oil catch tank - Wikipedia
Gavin.
 
Hi, Yes I know it's for emission standards that's why I said it depends on the state of the engine and oil misting. I've had plenty of Mk1 Cortina's when their engine gets tired covering the engine in oil and laying a smoke screen like a destroyer going down the road. What price clean air or rough running engine?

I take your point so no need for you to rustle up a rant. :D

Colin
 
Gargo said:
They don't need to be connect to the manifold to make them work.
Click to expand...
The V8 has positive crankcase pressure sure, but by having a feed into the manifold not only do you burn the nasties before they get out into the atmosphere it also drops crankcase pressure a little reducing gasket leaks etc.
 
When I was doing my own servicing on my P6b , the poor old girl started pushing oil out of all sorts of places on the motor.
A Rover V8 mechanic mate of mine picked up the problem as soon as I drove into his workshop just for a social catch up.
The flame traps were chocka
Another cheap leasson learnt.
 
I found these hoses and flame traps fairly easy to fin on sites such as. e-bay .wins international and wad hams but was quiet a while since I looked.
 
GRTV8 said:
When I was doing my own servicing on my P6b , the poor old girl started pushing oil out of all sorts of places on the motor.
A Rover V8 mechanic mate of mine picked up the problem as soon as I drove into his workshop just for a social catch up.
The flame traps were chocka
Another cheap leasson learnt.
Click to expand...

I've had a V8 build up so much pressure, it blew the dipstick out. Caused by a blocked flame trap.
 
Another thing is I saw on a p6b engine was that the overflow fuel lines that come from the carbs (that dump fuel to the ground?) were blanked off , would this effect running or something else?
 
I would vent both, or one side could get rather mucky, and the fuel return goes back to the tank, not to the ground.

Richard
 
I think thames means the overflow pipes not the fuel return pipe to the tank.
My concern with blocking off the overflow pipes is that they may actually be venting the float chamber, and by blocking them off you may mess with the fuel height in the carb.
Both rocker covers see the same crank case pressure.
 
I forgot about the overflow pipes, haven't had SUs for a few years :)

Both rocker covers will be subject to the same crankcase pressure, but if you only vent one of them the other one won't be getting rid of any oil and smoke building up, meaning it's going to get blackened quicker.
 
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