99 e300 td

i noticed that the 2 small coolant hoses are collapsing when i was reving the engine in the driveway. the one from the electric pump to the engine and the electric pump to the duovalve. everything else seemed to be normal.

any ideas what would be causing it? the hoses seem to be in good shape. i did buy new hoses but they seem to be as soft as the present hoses.

__________________
1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero

I rebuilt my duo-valve and I have a faint recollection that the valve is supposed to re-circulate the coolant when it's not feeding the heater cores. The rubber seals in my valve were swollen pretty badly. Yours may be in a similar condition although, I didn't observe the hoses collapsing.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

im havin heat problems so i was taking the duovalve apart to change the seals like u did but they werent too bad. however i did notice that those lil brass valves are broke. im gonna just replace the duovalve all together.

__________________
1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero

What leads you to think the valves are broken?

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

the stems on the 2 brass valves are broken and i have no heat

__________________
1993 e300
1995 e320
1994 e320
2006 s500 4matic
2004 Jeep wj overland
2001 Ducati 748
2004 Honda shadow aero