Posted by michel.capel (michel.capel@…>)
Guys,
Thanks so far for your advice. I thought about airlocks myself.
The Perkins manual describes three plugs (one on the exhaust
manifold cooling jacket, two on the cylinder head) to open and close
consecutively to bleed the air.
Alas, my version of the 4.108 does not have the two plugs on the
cylinder head while the plug on the exhaust housing is connected by
a thin bleed tube to the expansion tank, so it - hopefully - self
bleeds.
The hoses to and from the hotwater boiler both get hot so I assumed
there is no trap there. The boiler is the lowest point in the
cooling system; the expansion tank the highest.
Where would the airtrap be ?
— In freedomyachts2003@yahoogroups.com, Thomas Wales <twales@…>
wrote:
My overheating problem resulted from an airblock between the hot
water
heater and the circulating pump. While the engine is running,
we “burped”
the system by loosening the hose that exits the hot water tank and
releasing the air. Hope your problem is that simple
Good luck
TW
F32 #20
At 11:04 PM 2/24/2007 +0000, you wrote:
Guys, lend me your brains for a minute.
Yesterday I had my first trip - under engine - with my half
refurbished F44 catketch. We went from Goes to Strijensas. In
Zeeland, the Netherlands, that is. A 7 1/2 hour trip under engine
with fairly good conditions. Earlier, I had engine overheating
problems, so I replaced the thermostat, cleaned the heat exchanger
and checked if the water was being pumped around in both the fresh
water and the seawater cooling system. It did. I test ran the
engine
under load tied to the dock up to 2200 revs without problems.
Yesterday, everything went well up to 2600 revs. But we could
only do
about 5.5 knots, with 15 knots of wind on the quarter 6.2 kts.
Revving up to 3000, the engine began to overheat soon. However,
the
seawater side of the cooling system remained cold; as cold on the
exhaust injection side as on the intake side. The freshwater
cooling
system got hot. The expansion tank was hot and blowing out boiling
water and steam. The heat exchanger was not as hot as the
expansion
tank, so some heat exchange to the seawater was happening.
What could be the problem?
I did not take apart the fresh water pump (yet) so I don’t know
how
the fins are. And I know I need to replace the V-belt, it’s worn,
although it still works.
Any clues?
Thanks for thinking along with me.
Michel Capel
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 268.18.4/702 - Release Date:
2/25/2007
3:16 PM
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 268.18.4/702 - Release Date:
2/25/2007 3:16 PM
Posted by svfantasy@… (svfantasy@…>)
Michel,
It sounds like we have the same configuration of the cooling system. It is my understanding the airblock can occur almost anywhere. I have a threaded plug on the top of the head however, I could not get it to come out. I also have one on the exhaust manifold but can get that one to turn either. Thats why my mechanic suggested sealing my mouth over the header tank filling port and blowing steadily, pushing the coolant throughout the system. It took several times, but when you no longer hear the gurgling sound when you stop blowing, your done!
Jay
Posted by michel.capel (michel.capel@…>)
Jay, thanks. I’m gonna try that blowthing when the engine is cold,
okay! It will require some acrobatics to get my head between the
ceiling of the engine room and the filler opening. Or perhaps I can
use the thin overflow hose connected to the side of the filler tube,
while closing off the filler opening with my hand.
I’m surprised however that you can create enough pressure using your
mouth.
Michel
— In freedomyachts2003@yahoogroups.com, “svfantasy@…”
<svfantasy@…> wrote:
Michel,
It sounds like we have the same configuration of the cooling
system. It is my understanding the airblock can occur almost
anywhere. I have a threaded plug on the top of the head however, I
could not get it to come out. I also have one on the exhaust
manifold but can get that one to turn either. Thats why my mechanic
suggested sealing my mouth over the header tank filling port and
blowing steadily, pushing the coolant throughout the system. It took
several times, but when you no longer hear the gurgling sound when
you stop blowing, your done!
Jay
Posted by svfantasy@… (svfantasy@…>)
Michel,
All I can say is that it worked for me. However, I do not think you can get enough pressure using the thin overflow tube. If you have enough room over the filler port on the tank, try one of those pumps used to unclog drains with air pressure. You can get them at any hardware store. It will probably seal itself very well over the filler port. Good luck!
Jay
Posted by Thomas Wales (twales@…>)
Michael,
Usually it’s the highest point. My hot water heater is higher
than the engine. Perhaps you could try and bleed the expansion tank if
that’s the highest point.
Good Luck
TW
At 03:14 PM 2/26/2007 +0000, you wrote:
Guys,
Thanks so far for your advice. I thought about airlocks myself.
The Perkins manual describes three plugs (one on the exhaust
manifold cooling jacket, two on the cylinder head) to open and close
consecutively to bleed the air.
Alas, my version of the 4.108 does not have the two plugs on the
cylinder head while the plug on the exhaust housing is connected by
a thin bleed tube to the expansion tank, so it - hopefully - self
bleeds.
The hoses to and from the hotwater boiler both get hot so I assumed
there is no trap there. The boiler is the lowest point in the
cooling system; the expansion tank the highest.
Where would the airtrap be ?
— In
mailto:freedomyachts2003%40yahoogroups.comfreedomyachts2003@yahoogroups.com,
Thomas Wales <twales@…>
wrote:
My overheating problem resulted from an airblock between the hot
water
heater and the circulating pump. While the engine is running,
we “burped”
the system by loosening the hose that exits the hot water tank and
releasing the air. Hope your problem is that simple
Good luck
TW
F32 #20
At 11:04 PM 2/24/2007 +0000, you wrote:
Guys, lend me your brains for a minute.
Yesterday I had my first trip - under engine - with my half
refurbished F44 catketch. We went from Goes to Strijensas. In
Zeeland, the Netherlands, that is. A 7 1/2 hour trip under engine
with fairly good conditions. Earlier, I had engine overheating
problems, so I replaced the thermostat, cleaned the heat exchanger
and checked if the water was being pumped around in both the fresh
water and the seawater cooling system. It did. I test ran the
engine
under load tied to the dock up to 2200 revs without problems.
Yesterday, everything went well up to 2600 revs. But we could
only do
about 5.5 knots, with 15 knots of wind on the quarter 6.2 kts.
Revving up to 3000, the engine began to overheat soon. However,
the
seawater side of the cooling system remained cold; as cold on the
exhaust injection side as on the intake side. The freshwater
cooling
system got hot. The expansion tank was hot and blowing out boiling
water and steam. The heat exchanger was not as hot as the
expansion
tank, so some heat exchange to the seawater was happening.
What could be the problem?
I did not take apart the fresh water pump (yet) so I don’t know
how
the fins are. And I know I need to replace the V-belt, it’s worn,
although it still works.
Any clues?
Thanks for thinking along with me.
Michel Capel
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 268.18.4/702 - Release Date:
2/25/2007
3:16 PM
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 268.18.4/702 - Release Date:
2/25/2007 3:16 PM
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 268.18.4/705 - Release Date: 2/27/2007
3:24 PM
Attachment: (application/octet-stream) 2ffc194f.jpg [not stored]
Attachment: (application/octet-stream) 2ffc197e.jpg [not stored]
Attachment: None [not stored]
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 268.18.4/705 - Release Date: 2/27/2007 3:24
PM