PDA

View Full Version : Excessive smoke + losing oil

Chris_O
14th January 2011, 23:09
I have noticed in the last few week that my cars been quite smoky on start up. Smoke isn't expecially blue but does have a bit of an oily smell to it.

Only very recently checked the oil level, and it was just about reading on the dipstick, so quite a way below minimum. I've topped it up for the time being, is there likely to be any major damage done running the car with low oil?

I did service the car a few months back and use some slikolene 5w-40 oil, could this have had some sort of adverse affect over time rather than using the standard 10w-40? As I have read a couple of things about this somewhere recently.

Anyway, it's obviously buring oil in the engine, so leads me to believe valve stem seals / piston rings? Does it all add up?

Cheers :y:
saxo-parts
14th January 2011, 23:14
valve stem seals if it smokes on start up or overrun
dougieph2
14th January 2011, 23:22
what about a leak? maybe leaking onto the exhaust?
Chris_O
14th January 2011, 23:30
valve stem seals if it smokes on start up or overrun

Thought it may be this. Would you recommend running 10w-40 oil again after i've had the seals done? And any damage likely to be done?

what about a leak? maybe leaking onto the exhaust?

No leaks, car leaves no oil on the ground at all and is being burnt in the engine and comming out the end of the exhaust, not just off it somewhere lol
stevo67
15th January 2011, 13:33
Check its not leaking oil and the oils not running along the exhaust creating the smoke,as said also valve stem oil seals too.

Steve.
Meto
15th January 2011, 15:35
Use thicker oil IMO, it may stop SOME of it being burnt.
Tyanu888
16th January 2011, 20:46
more like valve seals! what mileage do you have??
Liam_
16th January 2011, 22:31
5W-40 won't have damaged the valve stem oil seals, you're probably noticing the smoke on startup as the oil is thinner than 10W-40 when cold.

Switching back to 10W-40 may give you less smoke, but it sounds like the seals probably need renewed in any case.
Chris_O
19th January 2011, 18:00
more like valve seals! what mileage do you have??

It's on about 75,000 atm

5W-40 won't have damaged the valve stem oil seals, you're probably noticing the smoke on startup as the oil is thinner than 10W-40 when cold.

Switching back to 10W-40 may give you less smoke, but it sounds like the seals probably need renewed in any case.

Yeah I thought the smoke might be a combination of the thinner oil + de-cat. But the oil has definately been dropping quite a lot through being burnt in the engine, so yeah I guess it's new seals time. More fucking money!