Both of the cossie's that i've owned have used oil, the current one a bit more than the first!

I know they all do it, but where is it most likely to come from, as in up through the rings or valve stem seals?

does anyone know?

 

Mine still used lots of oil after I'd had new valves and guides, and a new turbo. So, in my case it must have been past the piston rings, because I've just had a bottom end rebuild and now it uses hardly any, like 1/10 of what it used before.

 

mine uses bout 1 litre to 300 miles!!!!!!

theres no smoke coming from it either

 

Group A breather kit can stop a lot of oil loss!

 

They magic it away from new hence why Ford saw fit to put a sticker on them all saying 'check oil level daily'

My last lot of oil buring was down to rings.

 

At least none of us are alone

I use about a litre every 700 miles and it smokes lots when you open it up a bit

but its thick grey with no blue, strange

 

turbo dead by sounds of it then chap imo.

 

could that be where the majority of oil is going? straight out the turbo?

Pulls nice and strong so should just be the o seal

 

Thick grey is normaly turbo, blue is engine oil being burnt off, white is steam and black is over fueling. Thats my out look on it anyhows chap.

 

most cossies drink oil beacuse of fooked rings.

 

They also drink because of aftermarket exhausts losing back pressure, having no step gap, and no drilled ring in turbo.
tabetha

 

Mines is the opposite , hardly uses any at all

Sometimes i think my dipstick may be fooked its that bad / good!!

 

whats a drilled ring in the turbo?
cheers

I kind of like the smoke bellowing from the back, is that wrong

 

Ehh yes

 

as said it's usually worn rings... even new YB's use oil though, and there is a reason for it too!!

 

A drilled ring is a the ring surrounding the bearings through which the oil passes and gets consumed.
The ring is drilled with tiny holes to creat some BACKPRESSURE thus forcing oil back in, or rather pressure keeps it in to start with.
Small turbo escorts use less as they have tighter tolerances ie clearance between turbo bearings and shaft due to LIGHTER COMPONENTS PRODUCING less END FLOAT.
The shaft floats on a sea of oil(except roller bearing), but it is still a DOUBLE OVERHANG TURBO design.
The roller bearing is a much better design as it uses 1/4 of the enrgy to drive impellors etc as compared to traditional sleeve bearings.
sleeve bearings typically use 800 watts of power as opposed to 200 watts for ROLLER BEARING ones.
Shaft movement is massively less also, tests showed at 150,000rpm there was 0.025mm for the roller bearing compared with 0.13-0.25mm for the sleeve bearing.
BTW temps can excede 1000C in a turbo on a road car.
tabetha

 

Tell me please.

 

i would,but there's nothing that can be done about it

 

That's true. that sticker is still in my enginebay
(26k miles, one owner)

 

Check oil daily will probably be stickered over every cat in the land from all manufacturers, it is so that they cannot be held liable for some muppet saying "you did not say to check the oil" when it seizes, probably aimed at USA where the sue sue sue culture is, PANASONIC were sued successfully when a ladies CAT died after she put it in her MICROWAVE, as instructions for it did not say you could not do this.
tabetha

 

when the cossie was made ,the figure cosworth gave was ,the yb should use 1 litre if oil in 600 miles this is quite normall,

most people see black/dark grey soot from them when they boot it......overfuelling!! go closed loop!

 

Closed loop drops out when you boot it, it is only an advantage depending on what sort of driving you do, long motorway stuff it would be ace round town it is going to be open cycle all the time.
STU's system very very good, if I did long miles on m/way I would defo have it, the man is excellent with his tuning stuff.
tabetha

 

yep it does revert back to the original map on quick throttle movements, or throttle pos over 60% but the engine is sooo much cleaner internally it wont smoke so much when you boot it , , and there is no bore wash issues at idle, so the oil stays in better condition and lasts longer, doesnt loss viscosity as quickly due to contamination

 

id say going closed loop has halved my oil consumption.


and it wasnt toooo bad before!

 

i hope so
when i floor the thing for like half an hour , the oil level is at min
i've made my own catch tank from the breather and when i get the oil back in there it's at max again
is that pure a bad breather system (original) or are my piston rings worn out ?