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Warning...Idiot Question.. ;-)


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Apologies in advance for this question... I have searched without any luck although perhaps I haven't used the correct search terms.

I have a restored TR4 and it has Stromberg carbs. The two air cleaners have a tube from each centre that join and then connects to the rocker cover. I have been looking to replace my air filters but all the similar 'pancake' filters I find do not have this hole cut out of the cover to attach the hoses.

My question is 'what is the purpose of this connection to the rocker cover as I see photos of TR4 engines both with and without this attachment! Is it needed?

Thanks in advance!

Cheers,

Andrew (mechanical dummy)

carbs.jpg

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Early cars vent the crankcase gases directly out via a dog-leg tube near the fuel pump. They do not have the pipe work you refer to.

later cars, rather than vent straight out, use the hole in the rocker-cover the route the crankcase gases to the carb inlets so that they are burnt. This was all part of making the car a bit more environmentally-friendly back in the 60’s 

..... Andy 

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You can delete this setup, install the pancake filters and run a rubber hose plugged in the rocker cover on one end and let lose down to the chassis on the other end. Blow-bys will be released to atmosphere and your air/fuel mixture will improve.

PS: Do your new paint job a favor in adding a battery tray...

 

Edited by Geko
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Hi Andrew,

    it may be that the filter body may no longer be available - https://www.moss-europe.co.uk/shop-by-model/triumph/tr2-4a/fuel-system-induction-controls/air-filtration-induction/air-filters-tr4-4a.html

 

If this is the case then do as suggested above and duct straight into a catch tank form the rocker cover.

Can the filter body came apart and fit a new element inside.?

Roger

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