Hi
I've got problem with my V740. I've got B200K engine with mechanical
ignition and Solex carb. Auto run pretty when cold,but when it's hot it
doesn't working well. The whole coolant system is new,all parts,..the engine
is new too. When I stay in traffic jam, than is very bad working. The engine
works only when is cold, but when is hot is bad. What's wrong?? Can be too
poor mixture? and too hot temperature of engine? Thermostat and cooler and
coolant liquid are new. The valves are correct. When engine is very hot,
it;s sound very strange whet I go 2000 RPM and I push the pedal down, he
sound very bad, when it's cold it's sound very good.

Please help me,..I don't know what to do.... 99% parts in enegine deprature
is new,..the negine too (1700 km now!!!)

all the best....

--
Jarek (SQ1EUO) - V740 1988, B200K + LPG
sq1euo@stud.pam.szczecin.pl
GG:1277234

"sq1euo" <sq1euo@wp.pl> skrev i melding
news:f1dq94$q4k$1@achot.icm.edu.pl...
> Hi
> I've got problem with my V740. I've got B200K engine with mechanical
> ignition and Solex carb. Auto run pretty when cold,but when it's hot it
> doesn't working well. The whole coolant system is new,all parts,..the
> engine
> is new too. When I stay in traffic jam, than is very bad working. The
> engine
> works only when is cold, but when is hot is bad. What's wrong?? Can be too
> poor mixture? and too hot temperature of engine? Thermostat and cooler and
> coolant liquid are new. The valves are correct. When engine is very hot,
> it;s sound very strange whet I go 2000 RPM and I push the pedal down, he
> sound very bad, when it's cold it's sound very good.
>
> Please help me,..I don't know what to do.... 99% parts in enegine
> deprature
> is new,..the negine too (1700 km now!!!)
>

1. Mixture too lean
2. Ignition too late
3. Thermostat bad (or incorrect replaced)
4. Air in the coolant system

Could be something else, but... try the 4 above first.

--
-Knut
940 turbo...

"Knut Solem" <knut.solem@online.no> wrote in message
news:k-WdndDSY4PLTqbbRVnzvQA@telenor.com...
>
> "sq1euo" <sq1euo@wp.pl> skrev i melding
> news:f1dq94$q4k$1@achot.icm.edu.pl...
>> Hi
>> I've got problem with my V740. I've got B200K engine with mechanical
>> ignition and Solex carb. Auto run pretty when cold,but when it's hot it
>> doesn't working well. The whole coolant system is new,all parts,..the
>> engine
>> is new too. When I stay in traffic jam, than is very bad working. The
>> engine
>> works only when is cold, but when is hot is bad. What's wrong?? Can be
>> too
>> poor mixture? and too hot temperature of engine? Thermostat and cooler
>> and
>> coolant liquid are new. The valves are correct. When engine is very hot,
>> it;s sound very strange whet I go 2000 RPM and I push the pedal down, he
>> sound very bad, when it's cold it's sound very good.
>>
>> Please help me,..I don't know what to do.... 99% parts in enegine
>> deprature
>> is new,..the negine too (1700 km now!!!)
>>
>
> 1. Mixture too lean
> 2. Ignition too late
> 3. Thermostat bad (or incorrect replaced)
> 4. Air in the coolant system
>
> Could be something else, but... try the 4 above first.
>
>


I would definitely check the coolant temp sensor, I've come across a couple
of bad ones lately, one I got off a straight 740 in a junkyard, makes me
think that's probably why the car ended up there in the first place.
Apparently it will cause this symptom if it goes open circuit.

U¿ytkownik "James Sweet" <jamessweet@hotmail.com> napisa³ w wiadomo¶ci
news:Bp3%h.3176$XG1.1923@trndny07...
>
> "Knut Solem" <knut.solem@online.no> wrote in message
> news:k-WdndDSY4PLTqbbRVnzvQA@telenor.com...
> >
> > "sq1euo" <sq1euo@wp.pl> skrev i melding
> > news:f1dq94$q4k$1@achot.icm.edu.pl...
> >> Hi
> >> I've got problem with my V740. I've got B200K engine with mechanical
> >> ignition and Solex carb. Auto run pretty when cold,but when it's hot it
> >> doesn't working well. The whole coolant system is new,all parts,..the
> >> engine
> >> is new too. When I stay in traffic jam, than is very bad working. The
> >> engine
> >> works only when is cold, but when is hot is bad. What's wrong?? Can be
> >> too
> >> poor mixture? and too hot temperature of engine? Thermostat and cooler
> >> and
> >> coolant liquid are new. The valves are correct. When engine is very
hot,
> >> it;s sound very strange whet I go 2000 RPM and I push the pedal down,
he
> >> sound very bad, when it's cold it's sound very good.
> >>
> >> Please help me,..I don't know what to do.... 99% parts in enegine
> >> deprature
> >> is new,..the negine too (1700 km now!!!)
> >>
> >
> > 1. Mixture too lean

I've think the same

> > 2. Ignition too late

10 deeg.

> > 3. Thermostat bad (or incorrect replaced)

new one

> > 4. Air in the coolant system

new liquid,..without air


--
Jarek (SQ1EUO) - V740 1988, B200K + LPG
sq1euo@stud.pam.szczecin.pl
GG:1277234

U¿ytkownik "James Sweet" <jamessweet@hotmail.com> napisa³ w wiadomo¶ci
news:Bp3%h.3176$XG1.1923@trndny07...
>
> "Knut Solem" <knut.solem@online.no> wrote in message
> news:k-WdndDSY4PLTqbbRVnzvQA@telenor.com...
> >
> > "sq1euo" <sq1euo@wp.pl> skrev i melding
> > news:f1dq94$q4k$1@achot.icm.edu.pl...
> >> Hi
> >> I've got problem with my V740. I've got B200K engine with mechanical
> >> ignition and Solex carb. Auto run pretty when cold,but when it's hot it
> >> doesn't working well. The whole coolant system is new,all parts,..the
> >> engine
> >> is new too. When I stay in traffic jam, than is very bad working. The
> >> engine
> >> works only when is cold, but when is hot is bad. What's wrong?? Can be
> >> too
> >> poor mixture? and too hot temperature of engine? Thermostat and cooler
> >> and
> >> coolant liquid are new. The valves are correct. When engine is very
hot,
> >> it;s sound very strange whet I go 2000 RPM and I push the pedal down,
he
> >> sound very bad, when it's cold it's sound very good.
> >>
> >> Please help me,..I don't know what to do.... 99% parts in enegine
> >> deprature
> >> is new,..the negine too (1700 km now!!!)
> >>
> >
> > 1. Mixture too lean
> > 2. Ignition too late
> > 3. Thermostat bad (or incorrect replaced)
> > 4. Air in the coolant system
> >
> > Could be something else, but... try the 4 above first.
> >
> >
>
>
> I would definitely check the coolant temp sensor, I've come across a
couple
> of bad ones lately, one I got off a straight 740 in a junkyard, makes me
> think that's probably why the car ended up there in the first place.
> Apparently it will cause this symptom if it goes open circuit.
>
>

I think the cooland sensor is OK,....but anyway car goes wrong and engine
run bad, The alle cooland system is new (radiator,theromstat, coolant
liquid).


--
Jarek (SQ1EUO) - V740 1988, B200K + LPG
sq1euo@stud.pam.szczecin.pl
GG:1277234

On May 3, 7:11 pm, "sq1euo" <sq1...@wp.pl> wrote:
> Hi
> I've got problem with my V740. I've got B200K engine with mechanical
> ignition and Solex carb. Auto run pretty when cold,but when it's hot it
> doesn't working well. The whole coolant system is new,all parts,..the engine
> is new too. When I stay in traffic jam, than is very bad working. The engine
> works only when is cold, but when is hot is bad. What's wrong?? Can be too
> poor mixture? and too hot temperature of engine? Thermostat and cooler and
> coolant liquid are new. The valves are correct. When engine is very hot,
> it;s sound very strange whet I go 2000 RPM and I push the pedal down, he
> sound very bad, when it's cold it's sound very good.
>
> Please help me,..I don't know what to do.... 99% parts in enegine deprature
> is new,..the negine too (1700 km now!!!)
>
> all the best....
>
> --
> Jarek (SQ1EUO) - V740 1988, B200K + LPG
> sq1...@stud.pam.szczecin.pl
> GG:1277234

Since the cooling system was rebuilt, I would suspect an airlock or
air bubble in the cooling system. Have the mechanic that did the work
check.

"Roadie" <hjsjms@cs.com> wrote in message
news:1178409655.101510.184170@w5g2000hsg.googlegro ups.com...
> On May 3, 7:11 pm, "sq1euo" <sq1...@wp.pl> wrote:
>> Hi
>> I've got problem with my V740. I've got B200K engine with mechanical
>> ignition and Solex carb. Auto run pretty when cold,but when it's hot it
>> doesn't working well. The whole coolant system is new,all parts,..the
>> engine
>> is new too. When I stay in traffic jam, than is very bad working. The
>> engine
>> works only when is cold, but when is hot is bad. What's wrong?? Can be
>> too
>> poor mixture? and too hot temperature of engine? Thermostat and cooler
>> and
>> coolant liquid are new. The valves are correct. When engine is very hot,
>> it;s sound very strange whet I go 2000 RPM and I push the pedal down, he
>> sound very bad, when it's cold it's sound very good.
>>
>> Please help me,..I don't know what to do.... 99% parts in enegine
>> deprature
>> is new,..the negine too (1700 km now!!!)
>>
>> all the best....
>>
>> --
>> Jarek (SQ1EUO) - V740 1988, B200K + LPG
>> sq1...@stud.pam.szczecin.pl
>> GG:1277234
>
> Since the cooling system was rebuilt, I would suspect an airlock or
> air bubble in the cooling system. Have the mechanic that did the work
> check.
>

But he said it's running poorly when hot, surely if a cooling system problem
were to blame, it would have to be hot enough that some major damage is
being done for it to start running poorly.

U¿ytkownik "Gary Heston" <gheston@hiwaay.net> napisa³ w wiadomo¶ci
news:133qcmu71f2imcd@corp.supernews.com...
> In article <02a%h.1647$rk5.6@trndny06>,
> James Sweet <jamessweet@hotmail.com> wrote:
>
> >"Roadie" <hjsjms@cs.com> wrote in message
> >news:1178409655.101510.184170@w5g2000hsg.googlegr oups.com...
> [ ... ]
> >> Since the cooling system was rebuilt, I would suspect an airlock or
> >> air bubble in the cooling system. Have the mechanic that did the work
> >> check.
>
> >But he said it's running poorly when hot, surely if a cooling system
problem
> >were to blame, it would have to be hot enough that some major damage is
> >being done for it to start running poorly.
>
> Or a coolant sensor is losing contact with the coolant when the thermostat
> opens.
>
> I'd double check that the radiator is full, not just the overflow
reservoir.

I've checked it. Cooling system is 100% OK.


--
Jarek (SQ1EUO) - V740 1988, B200K + LPG
sq1euo@stud.pam.szczecin.pl
GG:1277234

On May 6, 7:00 am, "sq1euo" <sq1...@wp.pl> wrote:
> U¿ytkownik "Gary Heston" <ghes...@hiwaay.net> napisa³ w wiadomo¶cinews:133qcmu71f2imcd@corp.supernews.com. ..
>
>
>
> > In article <02a%h.1647$rk5.6@trndny06>,
> > James Sweet <jamessw...@hotmail.com> wrote:
>
> > >"Roadie" <hjs...@cs.com> wrote in message
> > >news:1178409655.101510.184170@w5g2000hsg.googlegr oups.com...
> > [ ... ]
> > >> Since the cooling system was rebuilt, I would suspect an airlock or
> > >> air bubble in the cooling system. Have the mechanic that did the work
> > >> check.
>
> > >But he said it's running poorly when hot, surely if a cooling system
> problem
> > >were to blame, it would have to be hot enough that some major damage is
> > >being done for it to start running poorly.
>
> > Or a coolant sensor is losing contact with the coolant when the thermostat
> > opens.
>
> > I'd double check that the radiator is full, not just the overflow
>
> reservoir.
>
> I've checked it. Cooling system is 100% OK.
>
> --
> Jarek (SQ1EUO) - V740 1988, B200K + LPG
> sq1...@stud.pam.szczecin.pl
> GG:1277234- Hide quoted text -
>
> - Show quoted text -

How did you check to see if there is an air bubble or air lock in the
system?

"sq1euo" <sq1euo@wp.pl> wrote in message
news:f1dq94$q4k$1@achot.icm.edu.pl...
> Hi
> I've got problem with my V740. I've got B200K engine with mechanical
> ignition and Solex carb. Auto run pretty when cold,but when it's hot it
> doesn't working well. The whole coolant system is new,all parts,..the
> engine
> is new too. When I stay in traffic jam, than is very bad working. The
> engine
> works only when is cold, but when is hot is bad. What's wrong?? Can be too
> poor mixture? and too hot temperature of engine? Thermostat and cooler and
> coolant liquid are new. The valves are correct. When engine is very hot,
> it;s sound very strange whet I go 2000 RPM and I push the pedal down, he
> sound very bad, when it's cold it's sound very good.
>
> Please help me,..I don't know what to do.... 99% parts in enegine
> deprature
> is new,..the negine too (1700 km now!!!)
>
> all the best....
>
> --
> Jarek (SQ1EUO) - V740 1988, B200K + LPG
> sq1euo@stud.pam.szczecin.pl
> GG:1277234
>
>
>
Jarek, if I understand correctly it overheats in traffic jams but is okay
when you get out on open road? If so, the air flow is probably the problem.

You probably have a fan on the water pump that is driven by a finned
aluminum "viscous coupler." If that coupler has lost some of the silicone
fluid it will be too weak to cool the radiator when the car is at low speed.
You can check it by trying to spin the fan by hand with the engine off. If
the fan stops within a quarter turn the coupler is working okay, but if it
goes more than 1/2 turn it is bad. Between 1/4 and 1/2 turn it is not very
good, but it is not the cause of your overheating.

I think there is also an electric fan on the front of the radiator; that
should be running when the engine gets hot (or maybe with the air
conditioning on - I forget which or both).

Mike