Chevrolet 6.5 diesel injector question

G

G Dunagan

Guest

• Mar 5, 2004

• #1

Hi everyone- I posted this question in rec.autos.tech but got no
response so I thought I'd try here- hope it's not to far off topic.

I've got a '92 Chevrolet Silverado 4x4 with a 6.5 turbo
diesel that's putting out a considerable amount of white smoke. There
is also quite a bit of fuel in the oil & it shows low oil pressure on
the instrument panel. When I bought the truck last year the guy
said his mechanic thought the truck had at least one bad injector.

Anyone think one bad injector(s) could cause all three problems? If
I could find a set of injectors cheap enough on ebay would this be a
job for a novice mechanic?


Thanks,
Greg

 

J

James BIGFOOT Holloway

Guest

• Mar 5, 2004

• #2

sounds to me lieka dead turbo ( white smoke) low oil pressure can be due to
the turbo( LEAKING OIL) and it being burnt(white smoke)
so in other words
TURBO IS SHAGGED
james

"G Dunagan" <[email protected]> wrote in message
news:[email protected]...
> Hi everyone- I posted this question in rec.autos.tech but got no
> response so I thought I'd try here- hope it's not to far off topic.
>
> I've got a '92 Chevrolet Silverado 4x4 with a 6.5 turbo
> diesel that's putting out a considerable amount of white smoke. There
> is also quite a bit of fuel in the oil & it shows low oil pressure on
> the instrument panel. When I bought the truck last year the guy
> said his mechanic thought the truck had at least one bad injector.
>
> Anyone think one bad injector(s) could cause all three problems? If
> I could find a set of injectors cheap enough on ebay would this be a
> job for a novice mechanic?
>
>
> Thanks,
> Greg

 

W

[email protected]

Guest

• Mar 5, 2004

• #3

Greg,

White smoke is an indication of raw fuel (vs. blue for burnt oil)
vaporizing in the exhaust. That could
be an injector issue but the fuel in the oil (and low oil pressure) seems
to indicate a breach in one of
the cylinders.

Not sure I'd recommend changing injectors on your own either.

Good luck

>Hi everyone- I posted this question in rec.autos.tech but got no
>response so I thought I'd try here- hope it's not to far off topic.
>
>I've got a '92 Chevrolet Silverado 4x4 with a 6.5 turbo
>diesel that's putting out a considerable amount of white smoke. There
>is also quite a bit of fuel in the oil & it shows low oil pressure on
>the instrument panel. When I bought the truck last year the guy
>said his mechanic thought the truck had at least one bad injector.
>
>Anyone think one bad injector(s) could cause all three problems? If
>I could find a set of injectors cheap enough on ebay would this be a
>job for a novice mechanic?
>
>Thanks,
>Greg

 

T

The Ancient One

Guest

• Mar 5, 2004

• #4

"James BIGFOOT Holloway" <[email protected]> wrote in message
news:[email protected]...
> sounds to me lieka dead turbo ( white smoke) low oil pressure can be due
to
> the turbo( LEAKING OIL) and it being burnt(white smoke)
> so in other words
> TURBO IS SHAGGED
> james
>

Sounds like the likely problem to me as well, the OP needs to find a good
diesel mechanic to confirm the problem because I doubt the engine will run
much longer without the fuel in the oil causing serious internal engine
damage.
It lowers the lubricating ability of the oil, causing cylinder scoring and
bearing failure, which will result in a blown engine. I would not even drive
it to the mechanic in the condition it is in without at least a fresh oil
change first.

> "G Dunagan" <[email protected]> wrote in message
> news:[email protected]...
> > Hi everyone- I posted this question in rec.autos.tech but got no
> > response so I thought I'd try here- hope it's not to far off topic.
> >
> > I've got a '92 Chevrolet Silverado 4x4 with a 6.5 turbo
> > diesel that's putting out a considerable amount of white smoke. There
> > is also quite a bit of fuel in the oil & it shows low oil pressure on
> > the instrument panel. When I bought the truck last year the guy
> > said his mechanic thought the truck had at least one bad injector.
> >
> > Anyone think one bad injector(s) could cause all three problems? If
> > I could find a set of injectors cheap enough on ebay would this be a
> > job for a novice mechanic?
> >
> >
> > Thanks,
> > Greg
>
>

 

A

Arturo Garza

Guest

• Mar 12, 2004

• #5

i don`t think your injector are bad. the white smoke is low
compression,the fuelis notcompress, so it will not fire. you have bad
rings or valves

 

J

Joseph Myers

Guest

• Mar 12, 2004

• #6

White smoke with a diesel is usally due to low temperatures,if this is
a ford or chevy, it is probably glow plug problems, if it is a dodge,
then it could be the intake grid heater, low compression or excess
unburned fuel will be dark or black.

Joe

On Thu, 11 Mar 2004 23:21:09 -0600 (CST), [email protected] (Arturo
Garza) wrote:

>i don`t think your injector are bad. the white smoke is low
>compression,the fuelis notcompress, so it will not fire. you have bad
>rings or valves

 

A

Arturo Garza

Guest

• Mar 12, 2004

• #7

if it were glow plugs it would not get the fuel into the motor oil, the
motor would burn it after it gets hot. low compression would not.

 

J

Joseph Myers

Guest

• Mar 16, 2004

• #8

You don't understand that Diesels naturally run lower temps than a
gasser, that is why a diesel wants to be loaded up all the time it is
running.

Joe

On Fri, 12 Mar 2004 01:35:28 -0600 (CST), [email protected] (Arturo
Garza) wrote:

>if it were glow plugs it would not get the fuel into the motor oil, the
>motor would burn it after it gets hot. low compression would not.

 

M

Master Chief

Guest

• Jun 30, 2004

• #9

This is BAD information. A DIESEL engine runs much hotter than a gas
engine. A DIESEL does NOT want to "load up" all the time.

Glow Plugs are ONLY used to start the engine. Most are on a timer circuit
or based on temperature. Once the engine is running, the glow plugs are
shut off.

I better keep a better eye on this group!


>You don't understand that Diesels naturally run lower temps than a
>gasser, that is why a diesel wants to be loaded up all the time it is
>running.
>
>Joe
>
>On Fri, 12 Mar 2004 01:35:28 -0600 (CST), [email protected] (Arturo
>Garza) wrote:
>
>>if it were glow plugs it would not get the fuel into the motor oil, the
>>motor would burn it after it gets hot. low compression would not.
>

 

D

Douglas A. Shrader

Guest

• Jun 30, 2004

• #10

"Master Chief" <[email protected]> wrote in message
news:[email protected]...
> This is BAD information. A DIESEL engine runs much hotter than a gas
> engine.

A diesel engine under load will run hotter than a gas engine. A diesel
idleing with no load will run much cooler. I drive a 75,500 Lb GVWR truck
with a Cummins diesel. In the winter at idle it doesn't produce enough heat
to run the cab heater, every so often I have to work the engine to warm it
back up or I freeze. Atr idle you can watch the temperature gauge drop all
the way to 100, the lowest it goes.


A DIESEL does NOT want to "load up" all the time.
>
> Glow Plugs are ONLY used to start the engine. Most are on a timer circuit
> or based on temperature. Once the engine is running, the glow plugs are
> shut off.
>
> I better keep a better eye on this group!
>
>
> >You don't understand that Diesels naturally run lower temps than a
> >gasser, that is why a diesel wants to be loaded up all the time it is
> >running.
> >
> >Joe
> >
> >On Fri, 12 Mar 2004 01:35:28 -0600 (CST), [email protected] (Arturo
> >Garza) wrote:
> >
> >>if it were glow plugs it would not get the fuel into the motor oil, the
> >>motor would burn it after it gets hot. low compression would not.
> >
>

 

J

Joseph Myers

Guest

• Jul 1, 2004

• #11

You just proved my point that a diesel wants to be loaded all the
time, Unlike a Gasser a true diesel like a Cummins is a Heat Engine,
most of its energy goes into output to the crank and very little to
the cooling system unless under very heavy load. A loaded up
diesel(within it rpm limits) is a happy diesel. on the other hand, an
unloaded diesel, at idle or low load will run cold, gum up injector
and piston rings and be a very unhappy Diesel. As a matter of fact, on
my toy 1 ton dually, Cummins recommends having the exhaust brake
activated on cold start up to provide a false load to help the engine
get up to operating temperature. By the way on the semi-diesels like
the ford and GM, the glow plugs are not just for start up, they will
thermostatically cycle as needed. Due to the lower compression ratio
of these semi-diesels, they will naturally run cooler combustion and
exhaust temperatures than a true diesel.

JMTCW



On Tue, 29 Jun 2004 21:37:17 -0500, "Douglas A. Shrader"
<[email protected]> wrote:

>
>"Master Chief" <[email protected]> wrote in message
>news:[email protected]...
>> This is BAD information. A DIESEL engine runs much hotter than a gas
>> engine.
>
>A diesel engine under load will run hotter than a gas engine. A diesel
>idleing with no load will run much cooler. I drive a 75,500 Lb GVWR truck
>with a Cummins diesel. In the winter at idle it doesn't produce enough heat
>to run the cab heater, every so often I have to work the engine to warm it
>back up or I freeze. Atr idle you can watch the temperature gauge drop all
>the way to 100, the lowest it goes.
>
>
>A DIESEL does NOT want to "load up" all the time.
>>
>> Glow Plugs are ONLY used to start the engine. Most are on a timer circuit
>> or based on temperature. Once the engine is running, the glow plugs are
>> shut off.
>>
>> I better keep a better eye on this group!
>>
>>
>> >You don't understand that Diesels naturally run lower temps than a
>> >gasser, that is why a diesel wants to be loaded up all the time it is
>> >running.
>> >
>> >Joe
>> >
>> >On Fri, 12 Mar 2004 01:35:28 -0600 (CST), [email protected] (Arturo
>> >Garza) wrote:
>> >
>> >>if it were glow plugs it would not get the fuel into the motor oil, the
>> >>motor would burn it after it gets hot. low compression would not.
>> >
>>
>