Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-18-2019, 03:19 PM   #1
Member
 
City: Orange Beach
Country: USA
Vessel Name: Seminole
Vessel Model: 42 Grand Banks Classic
Join Date: Dec 2014
Posts: 7
Lehman 120 cooling hose collapse

I have twin 120 Lehmans. On the port engine, the large diameter cooling hose coming up to the expansion tank on the port side of the engine collapses when the engine cools down after a normal 185 degree engine run. After the engine has cooled, I open the expansion tank cap and the hose comes back to normal. When cool, the coolant level is just below the bottom of the cap and the same as the starboard engine which does not have the collapsing hose issue; and I lose no coolant during running.

Any ideas what is going on? I do not have the tank coolant recovery upgrade done on either engine.

If it is cap related, I could swap starboard and port engine caps and see if the problem moves to the starboard engine hose...
__________________
Advertisement

83GB is offline   Reply With Quote
Old 03-18-2019, 04:15 PM   #2
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 12,591
Greetings,
Mr. 83. The first things that come to mind are weak hose or bad cap. Check your overflow tube (copper) for blockages.
__________________

__________________
RTF
RT Firefly is offline   Reply With Quote
Old 03-18-2019, 04:16 PM   #3
Guru
 
Cigatoo's Avatar
 
City: Narragansett Bay
Country: New England
Vessel Model: Grand Banks 36
Join Date: Sep 2016
Posts: 778
Radiator cap
Cigatoo is online now   Reply With Quote
Old 03-18-2019, 05:07 PM   #4
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 7,789
Squeeze the same hose on the other engine and see how it feels (please no jokes). We had the same issue on our FL but a different hose. The collapsed hose was coming off the back of the heat exchanger. The replacement hose had wire. But while you’re at it, change the cap if you don’t have any history. Let us know what you find.
Larry M is offline   Reply With Quote
Old 03-18-2019, 05:42 PM   #5
Member
 
City: Orange Beach
Country: USA
Vessel Name: Seminole
Vessel Model: 42 Grand Banks Classic
Join Date: Dec 2014
Posts: 7
Thanks all... I will start with the easy fix first... I have a spare cap from American Diesel. I will take the cap off Starboard engine and put it on the problematic port engine and put the spare on the Starboard engine... I will also squeeze starboard and port hoses to see if they feel the same....
83GB is offline   Reply With Quote
Old 03-18-2019, 05:56 PM   #6
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 5,371
Plese keep us informed as to how your hose feels when you squeeze it...
Comodave is offline   Reply With Quote
Old 03-19-2019, 06:41 AM   #7
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 3,446
And just so you know ADC sells a replacement hose kit for pretty cheap. if you dont know the age of the hoses its good PM.
__________________

__________________
Jay Leonard
Attitude Adjustment
40 Albin
Mystic,Ct. /New Port Richey,Fl
jleonard is online now   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 04:13 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×