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Member
Joined: Apr 23 2019
Posts: 527

V8 Gems... should i care that my crankcase breather hose does not have an oil separator in it? Never has since i've had it. The exhaust smells a bit at idle, but the car doesn't noticeably burn oil. Just wondering whether I need to buy an over-priced piece of plastic or not?

Member
Joined: Sep 02 2016
Posts: 491

Pricey bit of plastic indeed Rob, should be -literally- 'ten a penny' ....

Not exactly a critical component though: Its primary purpose of course is to allow oil vapours to condense back into liquid on it .
Over time (years) there is a build of 'crud' within the separator. Without it this all just happens in the breather hose instead ...
(also takes a while but) this possibly causes the hose to rot more rapidly (?)

Incidentally the other hose (on the throttle side) is more critical - at least if/when it falls apart and allows air in instead !

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Joined: Dec 30 2015
Posts: 4688

It's the sort of thing you tack onto another order so you aren't paying the extra carriage costs. Unless it has been replaced, it's also worth replacing the breather hose too. The originals were rubber so rot away with constant oil vapour in them whereas the replacements are something similar to neoprene so don't rot.

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Joined: Apr 23 2019
Posts: 527

fair enough... both PCV hoses are good, i replaced them when I changed the HGs earlier this year, but yes, they were not in good shape, and the one on the LH rocker cover had a hole on the underside.