I'm stumped and was hoping to get some ideas. I have a 1998 Glastron
175 with a Volvo Penta Cobra SX 135 hp engine. I've blown the same
hose three times. This is the hose that connects from the thermostat
housing to the circulating pump. They've all split in the same
location...the top half of the hose exiting the thermostat. If you
look on the inside of the hose, you can see a water line about half way
up the diameter of the hose. So obviously the system is not staying
filled with water. I did a raw water test and I'm getting good flow
coming in. I just had the head decked and resealed so I should not be
getting a pressure leak from the cylinders. Something is putting a lot
of pressure (and / or heat) on the hose. I would greatly appreciate
ideas.

Buy a different brand hose and report back.
JR

Bryan wrote:

I'm stumped and was hoping to get some ideas. I have a 1998 Glastron
175 with a Volvo Penta Cobra SX 135 hp engine. I've blown the same
hose three times. This is the hose that connects from the thermostat
housing to the circulating pump. They've all split in the same
location...the top half of the hose exiting the thermostat. If you
look on the inside of the hose, you can see a water line about half way
up the diameter of the hose. So obviously the system is not staying
filled with water. I did a raw water test and I'm getting good flow
coming in. I just had the head decked and resealed so I should not be
getting a pressure leak from the cylinders. Something is putting a lot
of pressure (and / or heat) on the hose. I would greatly appreciate
ideas.



--
--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth

I rutpured the original, then a used one from the marine off a merc
with the same block, then an oem. It's hard to imagine I've had 3 bad
hoses.
Bryan

JR North wrote:
Buy a different brand hose and report back.
JR

Bryan wrote:

I'm stumped and was hoping to get some ideas. I have a 1998 Glastron
175 with a Volvo Penta Cobra SX 135 hp engine. I've blown the same
hose three times. This is the hose that connects from the thermostat
housing to the circulating pump. They've all split in the same
location...the top half of the hose exiting the thermostat. If you
look on the inside of the hose, you can see a water line about half way
up the diameter of the hose. So obviously the system is not staying
filled with water. I did a raw water test and I'm getting good flow
coming in. I just had the head decked and resealed so I should not be
getting a pressure leak from the cylinders. Something is putting a lot
of pressure (and / or heat) on the hose. I would greatly appreciate
ideas.



--
--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth

On 15 Jun 2006 05:17:49 -0700, "Bryan"
wrote:

It's hard to imagine I've had 3 bad
hoses.

I agree.

Any history of overheating? Sticking thermostat?
Defective pressure cap? Excessive vibration?

"Wayne.B" wrote in message
...
On 15 Jun 2006 05:17:49 -0700, "Bryan"
wrote:

It's hard to imagine I've had 3 bad
hoses.

I agree.

Any history of overheating? Sticking thermostat?
Defective pressure cap? Excessive vibration?


Bad relationship with a dock neighbor?

RCE

www.eisboch.com

Should have mentioned that in the original post. Yeh, I overheated
last spring when the impeller broke up...bad enough that I had to
replace the exhaust manifold. What a disappointment to blow another
hose! Was thinking last night if my hose may be clogged from the
thermestat to the exhaust elbow. Not sure, but I think this is the
only other place to relieve pressure besides through the thermostat. I
also repaced the thermostat last year. I've been focused on what's
building pressure and not whats supposed to be relieving pressure.
Good thoughts, I'll be taking a look. Bryan


Gene Kearns wrote:
On Thu, 15 Jun 2006 09:47:28 -0400, "RCE" wrote:



Bad relationship with a dock neighbor?


You know.... that almost seems plausible. This shouldn't be hard to
check for. Hellatious pressure must be building up somewhere. Look for
the point in your cooling system that regulates pressure. It either
isn't or something really strange is taking place....

Just got word back from the mechanic. Appears that I have a small
crack in a cylinder. I guess that would have created pressure into the
cooling system thus causing the hose to rupture. Working towards a new
engine now. The joys of boating!

Bryan

Bryan wrote:
Should have mentioned that in the original post. Yeh, I overheated
last spring when the impeller broke up...bad enough that I had to
replace the exhaust manifold. What a disappointment to blow another
hose! Was thinking last night if my hose may be clogged from the
thermestat to the exhaust elbow. Not sure, but I think this is the
only other place to relieve pressure besides through the thermostat. I
also repaced the thermostat last year. I've been focused on what's
building pressure and not whats supposed to be relieving pressure.
Good thoughts, I'll be taking a look. Bryan


Gene Kearns wrote:
On Thu, 15 Jun 2006 09:47:28 -0400, "RCE" wrote:



Bad relationship with a dock neighbor?


You know.... that almost seems plausible. This shouldn't be hard to
check for. Hellatious pressure must be building up somewhere. Look for
the point in your cooling system that regulates pressure. It either
isn't or something really strange is taking place....