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| [tech question] red pot & pipe ? https://www.ausmini.com/forums/viewtopic.php?f=2&t=33681 |
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| Author: | whiteski [ Sun Jul 08, 2007 7:43 pm ] |
| Post subject: | [tech question] red pot & pipe ? |
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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| Author: | cush [ Sun Jul 08, 2007 7:58 pm ] |
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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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| Author: | willy [ Sun Jul 08, 2007 8:00 pm ] |
| Post subject: | |
cush wrote: 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... 'Tappet chest' breather actually. |
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| Author: | sports850 [ Sun Jul 08, 2007 8:51 pm ] |
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willy wrote: cush wrote: 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... '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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| Author: | Morris 1100 [ Sun Jul 08, 2007 9:05 pm ] |
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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) 
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| Author: | willy [ Sun Jul 08, 2007 9:07 pm ] |
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Morris 1100 wrote: Which is why it is called Positive Crankcase Ventilation or PCV. (not to be confused with PVC in which both willy and Cush both share an interest)
Mmmmmmm sexual PVC pipe, hey Michael? |
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| Author: | drmini in aust [ Sun Jul 08, 2007 9:17 pm ] |
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Morris 1100 wrote: Which is why it is called Positive Crankcase Ventilation or PCV.
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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| Author: | Bubbacluby [ Sun Jul 08, 2007 11:12 pm ] |
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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? |
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| Author: | cush [ Sun Jul 08, 2007 11:14 pm ] |
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so.. william... as we see... i was ****ing right....
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| Author: | Mick [ Sun Jul 08, 2007 11:18 pm ] |
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Bubbacluby wrote: 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? 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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| Author: | smac [ Mon Jul 09, 2007 6:16 am ] |
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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? |
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| Author: | drmini in aust [ Mon Jul 09, 2007 7:04 am ] |
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smac wrote: 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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| Author: | KLAS [ Mon Jul 09, 2007 7:36 am ] |
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smac wrote: Why do you need 'positive pressure' as long as you have a nice clear vent?
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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| Author: | Mick [ Mon Jul 09, 2007 9:26 am ] |
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[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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| Author: | smac [ Mon Jul 09, 2007 9:45 am ] |
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Sorry, by 'here' I meant NZ, not on ausmini
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