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H20a exhaust steam
https://auszookers.com/forum/viewtopic.php?f=5&t=41381		 Page 1 of 1
Author:  alexvitara [ Wed Jun 12, 2013 7:50 pm ]
Post subject:  H20a exhaust steam
My SV620 has a steamy exhaust :?

It didn't steam when i was buying it a month ago but now when starting it lets out a massive puff of white steam that dies down to a constant small amount of steam as it idles. If you put you hand near the exhaust after starting you get black dots on your hand but they look like carbon rather than oily. After a few minute you don't get any black dots, just a wet hand. Shortly after starting there is drops of water in the end of the tail pipe and the ground under/behind is wet.

Exhaust doesn't smell oily
Engine oil and coolant both look normal with no contamination
It is not using oil or coolant (except a little bit of oil from a leak)
It's not overheating
It runs like norma

Last night i took it for a run through the hills. I was driving it hard for an hour before stopping and having a look and it was still steaming a little bit. Checked everything this arvo and all vitals are normal.

It's doing my head in, where can the steam be coming from if it's not using coolant???

Image
Author:  atari4x4 [ Wed Jun 12, 2013 7:56 pm ]
Post subject:  Re: H20 exhaust steam
i'd answer this but apparently my avatar is just too damn cool. :P
Author:  alexvitara [ Wed Jun 12, 2013 9:04 pm ]
Post subject:  Re: H20 exhaust steam
So you're not going to help me because you have a problem with another user?
Author:  JrZook [ Wed Jun 12, 2013 9:12 pm ]
Post subject:  Re: H20 exhaust steam
Condensation with this wet/humid weather we are having. H2O is also a by-product of combustion, so if the exhaust is not hot enough the moisture will collect and form water droplets
Author:  atari4x4 [ Wed Jun 12, 2013 9:15 pm ]
Post subject:  Re: H20 exhaust steam
alexvitara wrote:
So you're not going to help me because you have a problem with another user?


pretty much pompoms

if i was you i'd take it to a mechanic & the the rad fluid tested for exhaust gasses, could be a number of things but that will eliminate the dreaded head gasket.
Author:  atari4x4 [ Wed Jun 12, 2013 9:16 pm ]
Post subject:  Re: H20 exhaust steam
JrZook wrote:
Condensation with this wet/humid weather we are having. H2O is also a by-product of combustion, so if the exhaust is not hot enough the moisture will collect and form water droplets


not sure what the weather is like up there but surely after an hour of thrashing it in the hills there would have been enough heat in the exhaust to burn off any moisture?
Author:  alexvitara [ Wed Jun 12, 2013 9:20 pm ]
Post subject:  Re: H20 exhaust steam
But shouldn't the condensation steam off quickly and not be there after an hour of driving?

H20 in the title is referring to the engine code not water, sorry if that's confusing.

So a mechanic can test weather exhaust is leaking into the coolant and therefore coolant leaking into exhaust?
Author:  atari4x4 [ Wed Jun 12, 2013 9:21 pm ]
Post subject:  Re: H20 exhaust steam
yeah & they can also pressure test the cooling system.
Author:  JrZook [ Wed Jun 12, 2013 9:28 pm ]
Post subject:  Re: H20a exhaust steam
Its been rainy and shit here the past few days. My bike (even being air cooled) still steams once I make it to uni. Air is very moist atm
Author:  JrZook [ Wed Jun 12, 2013 9:30 pm ]
Post subject:  Re: H20a exhaust steam
If you really want to check something, pull your plugs out. If it is using coolant then the associated cylinder will most likely have a really clean plug/piston crown.
Author:  atari4x4 [ Wed Jun 12, 2013 9:30 pm ]
Post subject:  Re: H20a exhaust steam
JrZook wrote:
moist


Image
Author:  alexvitara [ Wed Jun 12, 2013 9:52 pm ]
Post subject:  Re: H20a exhaust steam
Ok. I was going to compression test it so I'll check the plugs while I'm at it.

What do i need to disconnect to comp. Test a coil pack motor to stop it firing?
Author:  fordem [ Wed Jun 12, 2013 9:54 pm ]
Post subject:  Re: H20a exhaust steam
Pull the FI fuse - it stops injection & spark
Author:  droverdave [ Thu Jun 13, 2013 1:10 pm ]
Post subject:  Re: H20a exhaust steam
If its not losing coolant than you got nothing to worry about?

Nowhere else for water to come from other than coolant, combustion or condensation.
Author:  alexvitara [ Fri Jun 14, 2013 7:36 pm ]
Post subject:  Re: H20a exhaust steam
Ok I've pulled the plugs and they all look normal except one got covered in oil cause the sparkplug tube was full of oil (rocker cover gasket?)

Did a exhaust gas test and there is no exhaust gases in the cooling system.

Hard to tell if it's using water cause its not daily driven so I'm going to mark the overflow bottle and drive it all weekend and see if level changes. But i think it may be using a bit.

Still very wet exhaust, if i rev it up it shoots water drops out the tail pipe.

Is there some way coolant could get out thru the EGR or something?
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