Please excuse my ignorance ... I have two technical questions about the "red pot" located on the passenger side of the engine bay, tucked between the engine, SU and wiper bottle ... as shown in the centre of this image.

1) what function does it serve?

2) the black rubber pipe coming out of the top is only loosely wedged on top and does not lead anywhere in particular, except around and down to an open end ... is that ok?



Thanks in advance.

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-- Simon // VMCI Member 2674 --

it's the crankcase breather...

it should go to the carby or the air filter...

you'll notice the difference when you plug it back in...

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'Tappet chest' breather actually.

Which removes built up crankcase pressure from blowby of the rings along with other breathers .

Damn , I can't believe I'm coming to cush's defense on something .

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Which is why it is called Positive Crankcase Ventilation or PCV. (not to be confused with PVC in which willy and Cush both share an interest)

Mmmmmmm sexual PVC pipe, hey Michael?

It's only `Positive' if it actually gets some suction. Needs to go to a PCV valve or the SU suction chamber really.
A K&N Bling! filter on it does not give positive ventilation. Or any, once it clogs up...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

if that is blocked you blow out gaskets - oil seal gaskets

The canister bit is for when oil goes sqirting up it catches on the side and then runs back down, thats what somebody told me once if i remember correctly?

so.. william... as we see...


i was ****ing right....

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Yeah that's it, and if you do a loooong sweeping right hander on a race track, it will slowly fill up with oil and then dump it into your inlet manifold via the PCV. A great way to get flagged to get off the track in a curtain of blue smoke....

I does prevent oil leaks especially around the driveshaft oil seals if you have the PCV fitted. Well I never seem to have seal problems the way other fellows do when I have one fitted anyway.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

hmm...I've yet to see one (here) hooked up via the proper valve. Most are hooked straight into the filter or carb body, and that shags about with your idle. I dump straight into a bottle, but original stock design was straight in to atmosphere.
Why do you need 'positive pressure' as long as you have a nice clear vent?

Well...
1. It cuts down engine smells in daily driving. Mine only gets put into a catch tank for track days.
2. It helps prevent mayo in the rocker cover in cold weather. Various people here have had this problem lately.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

with minimum crankcase pressure the piston rings have an easier job sealing the bore and controling the oil.
if you find some you could use low tension piston rings (won't seal with normal crankcase pressure), gives less friction inside the bore and that can give you more power at the crank. but you have to make sure the pressure will never raise or the engine gets smokey. use a vacuum pump or evacu-pan system, will also help with a normal engine

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Rover 214 atm ....

[quote="smac"]hmm...I've yet to see one (here) hooked up via the proper valve. Most are hooked straight into the filter or carb body, and that shags about with your idle.


You will have seen them before, there's plenty on here hooked up:

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

Sorry, by 'here' I meant NZ, not on ausmini