like the topic says...every time i hit vtec in full throttle a puff of white smoke blows out the exhaust wat can this be?

 

I'd like to know BUMP.

 

Possible coolant problem in the early stages... leading to bad headgasket then to crack in block. Or if there is a tint of blue, then burning oil.

 

You're burning coolant someplace.
I would:
Compression test
Leak-down test
Change oil and flush coolant - and inspect it

In that order.

 

vtec+white smoke=no good and money to fix

 

you can have you radiator tested for gases from the combustion chamber.

that will tell you if you have a blown head gasket or cracked block and if its blowing into the coolant passages.

 

Yeah I would suspect the head gasket on that one

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by idumpwitmy12gaugepump &raquo;</TD></TR><TR><TD CLASS="quote">vtec+white smoke=no good and money to fix</TD></TR></TABLE>

Maybe he should just shoot it wit your 12 guage pump, thugz .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C-Rsi &raquo;</TD></TR><TR><TD CLASS="quote">

Maybe he should just shoot it wit your 12 guage pump, thugz .</TD></TR></TABLE>

hah...that is a terrible forum name.

 

White smoke=burning water/coolant
Blue smoke=burning oil

 

clogged cat.....are you sure its SMOKE? maybe its the powder substance that breasks loose out of the cat. iknow with my b18 every time i hit on it hard, my friends would say they would see a ton of white **** fly out of my exhaust.

im not saying it is a clogged cat for sure. but when i hollowed out my cat i still had a lot of the powder left over that i couldnt get out. and for like 5 miles, every time i floored it i left a thick *** white smoke screen. it was really just the catalist material blowing out.

 

see I get white exhaust in the morning, but I also think I'm burning oil, cause well it's low alot... and I don't see any spots on the ground where i park either?

 

well... i think i am burning oil...cuz every week after an oil change i gota add a qrt. i mean vtec motors do rev. high and all but i dont think it should be burning a qrt. a week. ima get it comp. tested asap..thanks guys

 

Your engine is old and probably burns oil an dmaybe some coolant which is not good.

Replace your catalytic converter to see if it helps.

 

I have the same problem...

I have my VTEC engaging at 4400

It smokes past 6000 rpms and its white with a tint of blue and is only noticeable sometimes...

What could i do to stop this?

I did a compression check and here are the results

Cylinder #1: 200
Cylinder #2: 188
Cylinder #3: 200
Cylinder #4: 200

Engine: D16Z6
Mileage:98,400
Mods: I/H/E

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Usdmdc2 &raquo;</TD></TR><TR><TD CLASS="quote">I have the same problem...

I have my VTEC engaging at 4400

Engine: D16Z6
Mileage:98,400
Mods: I/H/E


</TD></TR></TABLE>

Question...how did you get Vtec to engage at 4400?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ki3t &raquo;</TD></TR><TR><TD CLASS="quote">

Question...how did you get Vtec to engage at 4400?</TD></TR></TABLE>

VAFC probably. I also have this same issue. Only smokes at WOT in VTEC. It started after I put my head back on. My belief is that the head gasket didn't seal very well and a little coolant is making it into the combustion chamber. My compression is also good.

 

you see the white smoke from your rearview? or do your friends tell you, if you cant see it, its not that big or a problem :/

 

I can see it and I saw plenty of it on the dyno.

http://www.civichatch.com/regi...2.avi

 

are you losing and coolant? do a pressure test on your coolant system.

 

my opinon is that your head gasket is shoot or worse a crack somewhere (blown motor) my way to check for a very serious problem would be to drain your oil and check for milkshake (coolant in the oil). hope everything turns out good. also do you have a cold air intake or an intake that may have gotten wet? that may also be your problem.

 

Every Honda i have seen on the dyno has blown smoke in the higher rpm range... a guy with a Ls/vtec was the worst practially new engine and hudge blue cloud past 6500 rpms

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ki3t &raquo;</TD></TR><TR><TD CLASS="quote">

Question...how did you get Vtec to engage at 4400?</TD></TR></TABLE>

VAFC..

So you guys think its my headgasket?

My radiator is full but my ''resoivor tank'' only has a little bit in it

 

dam i didnt think so many pplz had this problem..i think mine is the coolent cuz im using the xtended life (orange coolant) i thought it would be better..ima switch back to the green one and see what happens.

 

There really isn't much doubt that it is being caused by coolant. The head is under much more stress in the upper RPMs in VTEC which is why it then is allowing a little coolant to enter the chamber. I have changed my oil a couple times and it looks normal. The coolant also looks fine. I am sure it is more common on LS/VTECs because of the dowel pin reloaction and such. I am going to try retorqueing my head and if it doesn't help I will pull it and do a new headgasket.