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water out pipe on cold starts


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chas
User

May 29, 2017, 1:31 PM

Post #1 of 7 (721 views)
water out pipe on cold starts Sign In

94 toyota 22re puckup.
just asking for opinions at this time. if i go to a shop they will probably try to sell me a CAT or some expensive diagnosis.
New cat, runs ok, not burning oil, no water leaks, not adding water, no pressure seems to building up in the cooling system or backing up to the coolant reservoir.
On cold starts overnight or been sitting for awhile it will take maybe 30secs to start a drip and spit some water and steam out the pipe for some time then clear up after it warms up.
When i swipe the end of the pipe with my finger sometimes after a drive across town a little moisture and carbon at the end of the pipe but not using water or oil. The cat is fresh maybe 2yrs old with low miles. No issues with oil, water.

The old CAT was burned out. Failed NOX. The new CAT is good. Passed smog no problem.
Is it condensation or is this normal to spit some water and steam out the pipe on cold starts and maybe some moisture hangin around the end of tail pipe or where could the water be coming from?


Hammer Time
Ultimate Carjunky / Moderator
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May 29, 2017, 2:18 PM

Post #2 of 7 (711 views)
Re: water out pipe on cold starts Sign In

It's called condensation. It's perfectly normal.



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Tom Greenleaf
Ultimate Carjunky / Moderator
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May 29, 2017, 2:22 PM

Post #3 of 7 (709 views)
Re: water out pipe on cold starts Sign In

chas: We don't even really need to be talking about a car just burning what we call gasoline is a concoction of things close enough to be called that if it was pure. Perfect combustion or just burning of gasoline makes exactly gallon for gallon WATER! When cool or cold pipes for exhaust it's condensing like water outside a glass of iced water sweats is it inside pipes of exhaust as well. When that is able it first drips out as a liquid or for a while when warming up shows as steam and normal depending exactly on temperatures pipes and the air the exhaust is being put in.


Same as a pot a warm water does not steam in room temp perhaps but if super cold outside and carried it, it would.


You have to know when to expect this or when it's abnormal.
You may just be noticing more because of recent work or failures being part fixed now and sensitive to everything and should be but this might be normal,


T



chas
User

May 31, 2017, 11:16 PM

Post #4 of 7 (668 views)
Re: water out pipe on cold starts Sign In

hammer>>>>>Re: water out pipe on cold starts


It's called condensation. It's perfectly normal.

Tom>>>>>You may just be noticing more because of recent work or failures being part fixed now and sensitive to everything and should be but this might be normal,

yeah i figured it would somewhat normal, but a lot of water is dripping and spitting out the pipe with a little steam for a little while until it warms then stops. I know its steam because it dont stink and goes away. If it was oil it would stink of oil and hang around. There were some major component fix to the smog. The VSV valve for the EGR was replaced and a new CAT.
Some say 006intake and 010exhaust. Been using 007intake and 010exhaust. Could be a little better. Chatter is low. Idles fairly quite.
The books and manuals say 008intake and 012exhaust adjusted hot. Don't use that. It sucks. Did it stone cold with outside temp of about 85-90 degrees at 007 and 010.


Tom Greenleaf
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Jun 1, 2017, 12:21 AM

Post #5 of 7 (664 views)
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chas: If cool or cold out so are metal exhaust pipes so it's normal. It will quit when pipes are hot enough which takes a while. Not yet for lower 48 states but when below zero F. cars continue to puff smoke (water vapor) and some water as pipes stay cold even with engines running otherwise it quits that just as you said. You would have to see this when dew points and seeing this knowing what temps are as well don't match up then there might be a problem.


I'm in New England. Temp ranges in one year right where I am have been minus 14.5F up to 108F so see the range of extremes. It doesn't stay at those extremes here is a difference,


Tom



chas
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Jun 1, 2017, 6:28 PM

Post #6 of 7 (650 views)
Re: water out pipe on cold starts Sign In


In Reply To
chas: If cool or cold out so are metal exhaust pipes so it's normal. It will quit when pipes are hot enough which takes a while. Not yet for lower 48 states but when below zero F. cars continue to puff smoke (water vapor) and some water as pipes stay cold even with engines running otherwise it quits that just as you said. You would have to see this when dew points and seeing this knowing what temps are as well don't match up then there might be a problem.


I'm in New England. Temp ranges in one year right where I am have been minus 14.5F up to 108F so see the range of extremes. It doesn't stay at those extremes here is a difference,


Tom>>>>>>>

chas>>>>>well, yeah i get that, but i'm in So Calif. We cant even get any rain. We were lucky this year and got above normal rain for the season. Interesting why there would be so much condensation and water in the pipes, CAT and muffler. It's been pretty dry here.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Jun 2, 2017, 1:52 AM

Post #7 of 7 (640 views)
Re: water out pipe on cold starts Sign In

Chas: Doesn't matter if it can rain where you are or not the fuel converts to water and carbon dioxide if/when burned perfectly as I said.


Then it's also about dew points. There's tons of water in the driest air and you don't realize it just because it doesn't rain. Been there and been in Death Valley too in the Summer no less if you have the right mix of temps, moisture available you get water that perhaps will dry is a second but see it just more when it's colder out and dew points high.
Catch the water if you wish on a paper towel and it should dry maybe a little dirt in it but dry to the touch. If it was antifreeze from your vehicle is wouldn't dry quickly at all water would as a basic test. If it dries it's normal. If not then let's find out what it is.


This is high school chemistry not rocket science - know what a dew point is it's in every forecast for weather!


Check your zip code at this site and find the dew point for each hour if you wish.............


http://www.intellicast.com/...px?location=USMA0235


This second right here dew point outside is 38F, in my home it's 34F (dew point that is) so my glass of water if below 34F with ice in it would sweat water out of the air if below 34F inside my home which would be too cold to consume for me so it isn't sweating now but would at another time. Simple as that,


Tom







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