puff of white smoke on inital startup ?
11-14-2004, 11:26 AM
#11
Guest
Posts: n/a
Re: puff of white smoke on inital startup ?
Dear Scar,
What do you mean by 'top end' job, and what's the difference between it
and a total rebuild ?
Thank you.
Courtney
The Scarlet Pimpernel wrote:
> On Thu, 11 Nov 2004 14:48:40 -0500, Courtney Thomas
> <ccthomas@joimail.com> wrote:
>
>
>>My '91 Audi 200 Turbo usually emits a cloud of white [not blue or black]
>>smoke on initial startup each day. After warmup this doesn't occur at
>>startup. It has about 335,000 miles on it. I'm assuming this probably
>>has dire consequences if it's cause is not determined and repaired.
>>
>>From worst to least damaging, what are the possible causes ?
>>
>>By priority of easiest to do, what should be the testing sequence to
>>determine the cause ?
>>
>>Any hints on conducting tests would be much appreciated.
>>
>>Gratefully,
>>Courtney
>>
> White smoke is oil. Black smoke is gas. You get white smoke when the
> oil leaks past the valve stem inserts onto the valve seat and burns
> off during the first minutes of engine run. Then engine heat swells
> the parts and prevents oil from draining past.
>
> You get black smoke after start up but usually reappears each time you
> accelerate from a stop when your rings are worn out and sometimes
> continuously during driving when the rings are really worn bad.
>
> Either way all these things are typical of an engine with the number
> of miles you have on your car and no amount of oil changes will
> prevent it. Its worn out and you need a top end job at least. Best
> have the whole engine rebuilt while it down though or junk it and
> start over.
>
--
s/v Mutiny
Rhodes Bounty II
lying Oriental, NC
WDB5619
What do you mean by 'top end' job, and what's the difference between it
and a total rebuild ?
Thank you.
Courtney
The Scarlet Pimpernel wrote:
> On Thu, 11 Nov 2004 14:48:40 -0500, Courtney Thomas
> <ccthomas@joimail.com> wrote:
>
>
>>My '91 Audi 200 Turbo usually emits a cloud of white [not blue or black]
>>smoke on initial startup each day. After warmup this doesn't occur at
>>startup. It has about 335,000 miles on it. I'm assuming this probably
>>has dire consequences if it's cause is not determined and repaired.
>>
>>From worst to least damaging, what are the possible causes ?
>>
>>By priority of easiest to do, what should be the testing sequence to
>>determine the cause ?
>>
>>Any hints on conducting tests would be much appreciated.
>>
>>Gratefully,
>>Courtney
>>
> White smoke is oil. Black smoke is gas. You get white smoke when the
> oil leaks past the valve stem inserts onto the valve seat and burns
> off during the first minutes of engine run. Then engine heat swells
> the parts and prevents oil from draining past.
>
> You get black smoke after start up but usually reappears each time you
> accelerate from a stop when your rings are worn out and sometimes
> continuously during driving when the rings are really worn bad.
>
> Either way all these things are typical of an engine with the number
> of miles you have on your car and no amount of oil changes will
> prevent it. Its worn out and you need a top end job at least. Best
> have the whole engine rebuilt while it down though or junk it and
> start over.
>
--
s/v Mutiny
Rhodes Bounty II
lying Oriental, NC
WDB5619
11-14-2004, 11:47 AM
#12
Guest
Posts: n/a
Re: puff of white smoke on inital startup ?
AFAIK
Bluish White Smoke = Oil burning (bad rings or pistons or valve guides or
too much oil in engine)
Black Smoke = Rich mixture (fuel not completely burning up due to many
possible factors)
White Smoke = Coolant or water burning off (Head Gasket or Cracked cylinder
head or block or excessive condensation in engine or exhaust burning off)
I wonder if moisture is building up in either the air filter or the exhaust
and that is causing your white smoke. If it is coolant the exhaust should
have a sweet smell to it. Don't breathe too much of it though!
Does this Audi do a lot of short trips? I have seen a few vehicles with
excess water in the oil due to short trips. Sometimes the condensation is
sucked/pushed through the PCV system into the intake. I am not sure if it
would be in a quantity to cause excessive white smoke though.
Top End Job = Cylinder Head rebuilding only
It is best to have the engine checked at a shop designed to check
compression and leakdown at least before you decide to spend too much $$$ on
it.
JMHO
later,
dave
"Courtney Thomas" <ccthomas@joimail.com> wrote in message
news:4197955F.4010907@joimail.com...
> Dear Scar,
>
> What do you mean by 'top end' job, and what's the difference between it
> and a total rebuild ?
>
> Thank you.
> Courtney
>
>
> The Scarlet Pimpernel wrote:
>
>> On Thu, 11 Nov 2004 14:48:40 -0500, Courtney Thomas
>> <ccthomas@joimail.com> wrote:
>>
>>
>>>My '91 Audi 200 Turbo usually emits a cloud of white [not blue or black]
>>>smoke on initial startup each day. After warmup this doesn't occur at
>>>startup. It has about 335,000 miles on it. I'm assuming this probably has
>>>dire consequences if it's cause is not determined and repaired.
>>>
>>>From worst to least damaging, what are the possible causes ?
>>>
>>>By priority of easiest to do, what should be the testing sequence to
>>>determine the cause ?
>>>
>>>Any hints on conducting tests would be much appreciated.
>>>
>>>Gratefully,
>>>Courtney
>>>
>> White smoke is oil. Black smoke is gas. You get white smoke when the
>> oil leaks past the valve stem inserts onto the valve seat and burns
>> off during the first minutes of engine run. Then engine heat swells
>> the parts and prevents oil from draining past.
>>
>> You get black smoke after start up but usually reappears each time you
>> accelerate from a stop when your rings are worn out and sometimes
>> continuously during driving when the rings are really worn bad.
>>
>> Either way all these things are typical of an engine with the number
>> of miles you have on your car and no amount of oil changes will
>> prevent it. Its worn out and you need a top end job at least. Best
>> have the whole engine rebuilt while it down though or junk it and
>> start over.
Bluish White Smoke = Oil burning (bad rings or pistons or valve guides or
too much oil in engine)
Black Smoke = Rich mixture (fuel not completely burning up due to many
possible factors)
White Smoke = Coolant or water burning off (Head Gasket or Cracked cylinder
head or block or excessive condensation in engine or exhaust burning off)
I wonder if moisture is building up in either the air filter or the exhaust
and that is causing your white smoke. If it is coolant the exhaust should
have a sweet smell to it. Don't breathe too much of it though!
Does this Audi do a lot of short trips? I have seen a few vehicles with
excess water in the oil due to short trips. Sometimes the condensation is
sucked/pushed through the PCV system into the intake. I am not sure if it
would be in a quantity to cause excessive white smoke though.
Top End Job = Cylinder Head rebuilding only
It is best to have the engine checked at a shop designed to check
compression and leakdown at least before you decide to spend too much $$$ on
it.
JMHO
later,
dave
"Courtney Thomas" <ccthomas@joimail.com> wrote in message
news:4197955F.4010907@joimail.com...
> Dear Scar,
>
> What do you mean by 'top end' job, and what's the difference between it
> and a total rebuild ?
>
> Thank you.
> Courtney
>
>
> The Scarlet Pimpernel wrote:
>
>> On Thu, 11 Nov 2004 14:48:40 -0500, Courtney Thomas
>> <ccthomas@joimail.com> wrote:
>>
>>
>>>My '91 Audi 200 Turbo usually emits a cloud of white [not blue or black]
>>>smoke on initial startup each day. After warmup this doesn't occur at
>>>startup. It has about 335,000 miles on it. I'm assuming this probably has
>>>dire consequences if it's cause is not determined and repaired.
>>>
>>>From worst to least damaging, what are the possible causes ?
>>>
>>>By priority of easiest to do, what should be the testing sequence to
>>>determine the cause ?
>>>
>>>Any hints on conducting tests would be much appreciated.
>>>
>>>Gratefully,
>>>Courtney
>>>
>> White smoke is oil. Black smoke is gas. You get white smoke when the
>> oil leaks past the valve stem inserts onto the valve seat and burns
>> off during the first minutes of engine run. Then engine heat swells
>> the parts and prevents oil from draining past.
>>
>> You get black smoke after start up but usually reappears each time you
>> accelerate from a stop when your rings are worn out and sometimes
>> continuously during driving when the rings are really worn bad.
>>
>> Either way all these things are typical of an engine with the number
>> of miles you have on your car and no amount of oil changes will
>> prevent it. Its worn out and you need a top end job at least. Best
>> have the whole engine rebuilt while it down though or junk it and
>> start over.
11-14-2004, 11:47 AM
#13
Guest
Posts: n/a
Re: puff of white smoke on inital startup ?
AFAIK
Bluish White Smoke = Oil burning (bad rings or pistons or valve guides or
too much oil in engine)
Black Smoke = Rich mixture (fuel not completely burning up due to many
possible factors)
White Smoke = Coolant or water burning off (Head Gasket or Cracked cylinder
head or block or excessive condensation in engine or exhaust burning off)
I wonder if moisture is building up in either the air filter or the exhaust
and that is causing your white smoke. If it is coolant the exhaust should
have a sweet smell to it. Don't breathe too much of it though!
Does this Audi do a lot of short trips? I have seen a few vehicles with
excess water in the oil due to short trips. Sometimes the condensation is
sucked/pushed through the PCV system into the intake. I am not sure if it
would be in a quantity to cause excessive white smoke though.
Top End Job = Cylinder Head rebuilding only
It is best to have the engine checked at a shop designed to check
compression and leakdown at least before you decide to spend too much $$$ on
it.
JMHO
later,
dave
"Courtney Thomas" <ccthomas@joimail.com> wrote in message
news:4197955F.4010907@joimail.com...
> Dear Scar,
>
> What do you mean by 'top end' job, and what's the difference between it
> and a total rebuild ?
>
> Thank you.
> Courtney
>
>
> The Scarlet Pimpernel wrote:
>
>> On Thu, 11 Nov 2004 14:48:40 -0500, Courtney Thomas
>> <ccthomas@joimail.com> wrote:
>>
>>
>>>My '91 Audi 200 Turbo usually emits a cloud of white [not blue or black]
>>>smoke on initial startup each day. After warmup this doesn't occur at
>>>startup. It has about 335,000 miles on it. I'm assuming this probably has
>>>dire consequences if it's cause is not determined and repaired.
>>>
>>>From worst to least damaging, what are the possible causes ?
>>>
>>>By priority of easiest to do, what should be the testing sequence to
>>>determine the cause ?
>>>
>>>Any hints on conducting tests would be much appreciated.
>>>
>>>Gratefully,
>>>Courtney
>>>
>> White smoke is oil. Black smoke is gas. You get white smoke when the
>> oil leaks past the valve stem inserts onto the valve seat and burns
>> off during the first minutes of engine run. Then engine heat swells
>> the parts and prevents oil from draining past.
>>
>> You get black smoke after start up but usually reappears each time you
>> accelerate from a stop when your rings are worn out and sometimes
>> continuously during driving when the rings are really worn bad.
>>
>> Either way all these things are typical of an engine with the number
>> of miles you have on your car and no amount of oil changes will
>> prevent it. Its worn out and you need a top end job at least. Best
>> have the whole engine rebuilt while it down though or junk it and
>> start over.
Bluish White Smoke = Oil burning (bad rings or pistons or valve guides or
too much oil in engine)
Black Smoke = Rich mixture (fuel not completely burning up due to many
possible factors)
White Smoke = Coolant or water burning off (Head Gasket or Cracked cylinder
head or block or excessive condensation in engine or exhaust burning off)
I wonder if moisture is building up in either the air filter or the exhaust
and that is causing your white smoke. If it is coolant the exhaust should
have a sweet smell to it. Don't breathe too much of it though!
Does this Audi do a lot of short trips? I have seen a few vehicles with
excess water in the oil due to short trips. Sometimes the condensation is
sucked/pushed through the PCV system into the intake. I am not sure if it
would be in a quantity to cause excessive white smoke though.
Top End Job = Cylinder Head rebuilding only
It is best to have the engine checked at a shop designed to check
compression and leakdown at least before you decide to spend too much $$$ on
it.
JMHO
later,
dave
"Courtney Thomas" <ccthomas@joimail.com> wrote in message
news:4197955F.4010907@joimail.com...
> Dear Scar,
>
> What do you mean by 'top end' job, and what's the difference between it
> and a total rebuild ?
>
> Thank you.
> Courtney
>
>
> The Scarlet Pimpernel wrote:
>
>> On Thu, 11 Nov 2004 14:48:40 -0500, Courtney Thomas
>> <ccthomas@joimail.com> wrote:
>>
>>
>>>My '91 Audi 200 Turbo usually emits a cloud of white [not blue or black]
>>>smoke on initial startup each day. After warmup this doesn't occur at
>>>startup. It has about 335,000 miles on it. I'm assuming this probably has
>>>dire consequences if it's cause is not determined and repaired.
>>>
>>>From worst to least damaging, what are the possible causes ?
>>>
>>>By priority of easiest to do, what should be the testing sequence to
>>>determine the cause ?
>>>
>>>Any hints on conducting tests would be much appreciated.
>>>
>>>Gratefully,
>>>Courtney
>>>
>> White smoke is oil. Black smoke is gas. You get white smoke when the
>> oil leaks past the valve stem inserts onto the valve seat and burns
>> off during the first minutes of engine run. Then engine heat swells
>> the parts and prevents oil from draining past.
>>
>> You get black smoke after start up but usually reappears each time you
>> accelerate from a stop when your rings are worn out and sometimes
>> continuously during driving when the rings are really worn bad.
>>
>> Either way all these things are typical of an engine with the number
>> of miles you have on your car and no amount of oil changes will
>> prevent it. Its worn out and you need a top end job at least. Best
>> have the whole engine rebuilt while it down though or junk it and
>> start over.
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