Okay this is really strange:
In about four days my sparkplugs went from this:
To an unexplainable oily mess like this:
I’ll give you the full story. This morning I went out to get some new spark plugs, oil + filter, an oilplug and some injector cleaner.
After replacing the sparkplugs and filling the oil I figured I’d start her up to let the oil circulate.
Immediatly thick blue ish clouds of smoke started coming out of the exhaust (and I know what you’re thinking: you’ve probably just poured in to much oil. This wasnt the case.)
I put in 2 -and a little- liters of fresh 5w30 oil. I think I’ve looked at my dipstick 40 times over but I’m confident I’m reading it right. It’s about 4mm under full.
After letting it heat up outside the clouds of smoke still wouldn’t go away. So I brought her back in and opened everything up. New sparkplugs are now also black and a little oily on the side. I decided to peek into the cilinder and it had a noticable layer of oil on the top of the piston.
Now the question, how in the who what where did that get there. I honestly have no clue except for some guy in the garage sabotaging my work. Pouring old oil into my cilinders?
So far i’ve checked:
-Oil level (it’s good I’m 100% sure)
-compression test (13 bar in cyl 1 and 2, 14 in 3. I’m doubting any failing piston rings.)
-Rocker cover sparkplug seals (nothing seems out of the ordinary)
Honestly i’m at a loss for words. I’ve been working on cars for quite sometime now and I refuse to believe I’ve failed to complete a simple oil and sparkplug change.
I’ve had a mate come over to check things out, said it would probably be best to give it the ol “italian tune-up”
Which meant just getting it nice and hot and burning off any residual oil. So far i’ve driven it home alright.
I did have some backfire when doing 50km/h in third, amd then giving it a sharp full throttle kick. This went away after 20 minutes on the highway going around 120km/h.
Throttle response feels better now, it was still puffing a little smoke when I got back but it looks to be somewhat better. I’ll open everything up again tomorrow to see if the piston tops are dry. Also should clean up my new shiny sparkplugs. Which unfortunately arent so shiny any more.
If anyone has any idea whatsoever as to how this could have happened. Please let me know! I can’t wrap my head around this.