at vtec car blows smoke

[YBJLS4]

teg is blowing white/grey smoke at very high revs. i know this is characteristic for some cars at crossovers so should i be worried if my engine oil and radiator coolant shows no signs of problems and is running smooth? not related but is 5w40 sae bp oil safe for my car? it aint castrol edge or feo but had a bottle just wondering if i should use it? currently running like 30w60(high) or something.

[IndoStyler]

when using oils, i think a rating of 5w-40 would be better than 30w-60 in most modern engines as the 30w-60 might be too thick

[rice_spirit]

i've been told that white smoke is an indicator of a blown/leaking head gasket..

someone please correct me.

[SiReal]

thats under standard idle and car heats up really quick.

basically water is getting into your cylinders and that 'white smoke' is water from your radiator, becoming steam through the combustion chamber

[YBJLS4]

how bad is that?

[tOniies]

You pretty much need a rebuild for that. Should get a engine compression test, to see if the cylinders are running right.

[MWAKU]

see what happens lol, tell the guy drive down n then u can't check for head gasket problems :P

in the mean time, keep the coolant in the radiator and overflow bottle topped up, and check the oil dipstick or under the oil cap for a milky residue, then for sure headgasket is gone (but i didn't see ne of this when we looked at ur car)

[Lukey]

change to the 5w40 oil

[Zilli]

i know there are some people on here that complain of white smoke at high revs and when changing gears at high revs... what you need to really truly determine is if it is white, or blue black whitey smoke... and if it smells (which is obviously going to be veyr difficult)...

If it is what i am describing then it's oil burning, and that is a result of shot piston rings allowing oil into the combustion chamber... do you get any smoke on startup?

[YBJLS4]

once in a while.

[SiReal]

when im sitting in vtec, i get dark coloured smoke, but i believe thats just the ecu mapping running slightly rich to keep the engine from blowing up from running lean,


p.s. it wont literally blow up.

[YBJLS4]

sounds pretty spot on, doesent always happen but once in very long while other blows not even a spec of smoke at all or blows alot. if thats it it shouldnt be anything other than the pistons right? would dc2r pistons be straight fit for vtir?

[aaronng]

Firstly, change to one of the following oils immediately: 0w-30, 5w-30, 10w-30, 0w-40, 5w-40 or 10w-40.

30w-60 is too thick and will cause wear and possibly damage to moving parts in the head which also rely on oil for lubrication.

Secondly, the ECU uses a richer fuel map after vtec crossover in order to compensate for the additional air coming from the higher lift and also to protect the engine from having a lean condition.

[kraiye]

sounds like typical vtec smoke to me.

[AXS]

mate to tell u the truth i had same problem switched to castrol edge 10-60 and you know wat reduced smoke by heaps and the cr runs so much better neva neede to top up oil levels alsways the same top oil

[YBJLS4]

ye changed oil the other day and it runs like a diff car.

[tOniies]

You should see 2 integras drag racing. LOL biggest smoke bomb out. Can't see anything, and the smell of burning engine oil. MmmmMMmm YUMMYYYY

[migoreng]

my car does the same thing. engine is a h22a4. during the day sometimes i see a grey/black haze in the rear view mirror.
at night it's more visible with all the headlights behind and i leave a long trail of smoke.

my dyno graph shows the AFR at ~11.8 at redline so it's pretty rich. hopefully my afc neo can lean it out...

[tOniies]

i think its just our cars running too rich, or its not tuned.

[johnny5]

i have the same problem as ya... was told by my mechanic that its most prolly stem seals that need to be replaced... i've yet to do it yet... when i do, i'll let you know if that works...

[migoreng]

lots of smoke when accelerating means worn rings right?
afaik worn valve stem seals cause smoking once you engine brake/idle then get back on the throttle.