+- 306oc - Peugeot 306 Owners Club & Forum (https://www.306oc.co.uk/forum)
+-- Forum: Engines (https://www.306oc.co.uk/forum/forumdisplay.php?fid=16)
+--- Forum: XUD Section (https://www.306oc.co.uk/forum/forumdisplay.php?fid=11)
+--- Thread: oil out of breather under hard cornering (/showthread.php?tid=36133)
oil out of breather under hard cornering - zx_volcane - 19-07-2017
Anyone like to shed some light on this?
Took zx out on track, and it decided to puke oil out of the breather hose - admittedly just floating in the engine bay
Made a mess, but only lost less than 500ml
Have not been able to replicate it since, even giving it absolute death on the way home / motorway.
Putting it down to hard cornering, as its spattered before after some spirited country rd driving.
So I've either overfilled it in the first place, or something else is causing it to throw up under hard cornering.
Any suggestions beyond fitting a catch tank?
Am I ok to leave the oil level on the lower side of the dipstick? Best procedure to measure level beyond having it on a flat surface, cold, hot ..etc
RE: oil out of breather under hard cornering - Mattcheese31 - 19-07-2017
I mean anywhere between the marks on the dipstick is safe isn't it, not gonna do any harm being on the lower side i wouldn't imagine, it's not like the oil isn't reaching the top of the engine lol
RE: oil out of breather under hard cornering - welshpug - 19-07-2017
got a sump baffle? which way was the high G corners on the circuit?
I'd get the breather sorted, if its potentially puking then knowingly chucking oil on the road is not a great idea.
RE: oil out of breather under hard cornering - zx_volcane - 19-07-2017
(19-07-2017, 09:56 AM)welshpug Wrote: got a sump baffle? which way was the high G corners on the circuit?
I'd get the breather sorted, if its potentially puking then knowingly chucking oil on the road is not a great idea.
no idea on which corner, mostly right handers at donnington
have fitted bottle to catch anything since, but not a drop on the 100mile+ journey home
no baffles in sump, stock hdi ali sump
RE: oil out of breather under hard cornering - bashbarnard - 19-07-2017
Ive had it before on a couple of builds where the back pressure in the exhaust causes a rise in crank case pressures and then in turn it to piss oil out the breather. It seems odd that you havnt been ab;e to replicate it since though. Did you have high emps with the other setting of boost you were running on the day?? vanes not opening enough??
RE: oil out of breather under hard cornering - zx_volcane - 19-07-2017
(19-07-2017, 10:08 AM)bashbarnard Wrote: Ive had it before on a couple of builds where the back pressure in the exhaust causes a rise in crank case pressures and then in turn it to piss oil out the breather. It seems odd that you havnt been ab;e to replicate it since though. Did you have high emps with the other setting of boost you were running on the day?? vanes not opening enough??
didn't change it for the drive home and gave it absolute death to redline
exhaust backpressure isn't insane on this vnt, peaks about 1.5x inlet - and in most cases it is equal to or under.
RE: oil out of breather under hard cornering - welshpug - 19-07-2017
I'd get a baffle in it if you plan on more track work, having the oil all on the left side of the sump away from the oil pump is not ideal and these engines don't have a windage tray either, not especially a concern as revs arent very high.
RE: oil out of breather under hard cornering - zx_volcane - 19-07-2017
(19-07-2017, 10:49 AM)welshpug Wrote: I'd get a baffle in it if you plan on more track work, having the oil all on the left side of the sump away from the oil pump is not ideal and these engines don't have a windage tray either, not especially a concern as revs arent very high.
agree - but would it cause it to puke out of breather?
RE: oil out of breather under hard cornering - welshpug - 19-07-2017
depends which breather? head or bottom end?
RE: oil out of breather under hard cornering - zx_volcane - 19-07-2017
(19-07-2017, 11:44 AM)welshpug Wrote: depends which breather? head or bottom end?
both feed into the oil filler - and then out the top of that via a single breather pipe