Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-28-2018, 05:23 PM   #1
Senior Member
 
City: Russell NZ
Country: Russell NZ
Vessel Name: MV Unique
Vessel Model: Salthouse Coastal 35
Join Date: Jul 2013
Posts: 115
Motor running cold

Hi team, after 10 years I have just learnt my temperature gauge is reading way out and I have been running a 4 cylinder Ford Lemann at 80 to 85 centigrade instead of the factory Ford spec of 99 deg.


What is the effect of running a diesel cold and will I have done any damage!!
__________________
Advertisement

Phil23 is offline   Reply With Quote
Old 11-28-2018, 05:31 PM   #2
Guru
 
LaBomba's Avatar
 
City: Beaverton, Ontario
Country: Canada
Vessel Name: Looking Glass
Vessel Model: Carver 370 Voyager
Join Date: Nov 2012
Posts: 1,145
Many Diesel engines run at 80 to 85 C so I wouldn't expect that you have done any harm whatsoever. Overheating is more detrimental IMO.
__________________

__________________
Allan
LaBomba is offline   Reply With Quote
Old 11-28-2018, 05:43 PM   #3
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: 5,462
85C converts to 185F, that is what my SP225s run at.
Comodave is offline   Reply With Quote
Old 11-28-2018, 06:06 PM   #4
Guru
 
Lou_tribal's Avatar
 
City: Quebec
Country: Canada
Vessel Name: Bleuvet
Vessel Model: Custom Built
Join Date: Jan 2016
Posts: 3,487
What temp are you measuring and what temp is recommended to be 99C? If measure is coolant and recommendation is oil temps this is normal.

L
Lou_tribal is offline   Reply With Quote
Old 11-28-2018, 07:17 PM   #5
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 15,996
My Mitsu runs very close to 200f.
On the original thermostat.
Can’t remember the cap release pressure. Guessing 13lbs.
I don’t see a problem w higher coolant temp other than if you encounter a problem (such as a coolant leak causing a temp rise) things could get out of hand alittle sooner. But the boiling point could be the same number of lbs pressure above the thermostat opening temp. So it’s not that different if at all. But with higher pressure the boiling point will be higher. Put another way one could run 5 to 7 degrees hotter w/o boiling. Very similar just higher pressure and temp. And again (for me) this was the thermostat that came w the engine new.

As to the downside to running cold (about 170f or less) the buildup of varnishes and other deposits in the ring lands and elsewhere that cause compression loss lowering combustion temps again increasing deposits ect ect. From a standpoint of varnish, sludge and other similar troubles running hotter is better ... IMO.
__________________
Eric

North Western Washington State USA
Nomad Willy is offline   Reply With Quote
Old 11-28-2018, 07:28 PM   #6
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 12,617
Greetings,
Mr.23. My girlfriend's got the same problem....


__________________
RTF
RT Firefly is online now   Reply With Quote
Old 11-28-2018, 07:39 PM   #7
Guru
 
AusCan's Avatar
 
City: Adelaide
Country: Australia
Vessel Name: Kokanee
Vessel Model: Cuddles 30 Pilot House Motor Sailer
Join Date: Jul 2012
Posts: 2,870
My Vetus (Mitsubishi) runs at about 85 Celsius. My old MD17 Volvo ran at about 60C but raw water cooled engines always run cool to minimise salt build up. It doesnt harm the engine.
AusCan is offline   Reply With Quote
Old 11-28-2018, 07:45 PM   #8
Guru
 
Lepke's Avatar
 
City: Between Oregon and Alaska
Country: US
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 1,554
Looks normal to me.
Attached Images
 
Lepke is offline   Reply With Quote
Old 11-28-2018, 09:14 PM   #9
Guru
 
IRENE's Avatar
 
City: Port Angeles, WA
Country: USA
Vessel Name: Irene
Join Date: Jan 2016
Posts: 722
FWIW, our John Deere 4045TFM75 (107hp M1) runs a 180-degree thermostat. The normal range we observe is 175-184, and we are keel-cooled.
__________________
Jeff
MV IRENE
IRENE is offline   Reply With Quote
Old 11-29-2018, 12:57 AM   #10
Guru
 
North Baltic sea's Avatar
 
Country: Finland
Vessel Model: Nordic Tug 37
Join Date: Sep 2015
Posts: 913
Hi,

Your Ford engine and thermostat:

If you suspect this is not working properly, you can immerse it in a suitable container that will gradually warm up. Valve must start open at 71 C and 87 C full open.

Do not adjust if the thermostat does not function properly. Replace it with a new one

Are you sure that 99 C would be the correct heat of the oil and not the cooling because the oil max heat is given at 116 C?


Your engine run fine cooling temp, 80-85C is very OK, i think.
NBs
North Baltic sea is offline   Reply With Quote
Old 11-29-2018, 05:23 AM   #11
Dauntless Award
 
Wxx3's Avatar
 
City: New York, NY
Country: USA
Vessel Name: Dauntless
Vessel Model: Kadey Krogen 42 - 148
Join Date: Jan 2013
Posts: 2,715
Quote:
Originally Posted by Phil23 View Post
Hi team, after 10 years I have just learnt my temperature gauge is reading way out and I have been running a 4 cylinder Ford Lemann at 80 to 85 centigrade instead of the factory Ford spec of 99 deg.


What is the effect of running a diesel cold and will I have done any damage!!
Well I must be toast, since my Ford Lehman run 77 to 83C routinely since forever.

It does not make sense that the coolant temperature is supposed to be 99C.
Ignore whatever you have read and carry on.
__________________
Richard on Dauntless,
New York

a Kadey Krogen 42 currently: https://share.garmin.com/dauntless
Blog:
https://dauntlessatsea.com
Wxx3 is offline   Reply With Quote
Old 11-30-2018, 01:30 PM   #12
Guru
 
kchace's Avatar
 
City: Brookline, NH
Country: USA
Vessel Name: Blue Heaven
Vessel Model: Albin 43 classic double cabin, twin 135 Lehmans
Join Date: Sep 2013
Posts: 1,581
Standard FL thermostat temp is specd at 78c.
kchace is offline   Reply With Quote
Old 12-01-2018, 05:02 AM   #13
Guru
 
North Baltic sea's Avatar
 
Country: Finland
Vessel Model: Nordic Tug 37
Join Date: Sep 2015
Posts: 913
Quote:
Originally Posted by kchace View Post
Standard FL thermostat temp is specd at 78c.


Hi,
This information Ford Lehman sabre, I do not know the difference between basic Lehman? Link to material.

page 9, optimal temperature 90C, termostat operation temp 79-88 C (175-190)


https://www.kdtrading.no/file/nedlas...ord_lehman.pdf

NBs
North Baltic sea is offline   Reply With Quote
Old 12-01-2018, 08:56 AM   #14
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: 7,791
Bomac Marine, when Greg, rebuilt our engine, installed a 75 C (167 F) thermostat. At first I though my electronic gauge was off. They use to read 187 F. I installed a mechanical gauge that confirmed my electrical gauge was good. I called Boamac and he said running a little cooler is better than running hotter on the FLs. The last oil analysis was perfect so I’m leaving it. I trust Bomac. They probably rebuild more FLs than anyone else in the country. For what it’s worth, we typically don’t run for less than 4 or 5 hours at a time and usually longer.
Larry M is online now   Reply With Quote
Old 12-01-2018, 10:42 AM   #15
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 3,457
My FL 120 runs at 170 F at the expansion tank with a standard thermostat.
__________________
Jay Leonard
Attitude Adjustment
40 Albin
Mystic,Ct. /New Port Richey,Fl
jleonard is online now   Reply With Quote
Old 12-01-2018, 04:17 PM   #16
Senior Member
 
City: Russell NZ
Country: Russell NZ
Vessel Name: MV Unique
Vessel Model: Salthouse Coastal 35
Join Date: Jul 2013
Posts: 115
Thanks for all the advise guys I am sticking with my 80 degree C
Phil23 is offline   Reply With Quote
Old 12-02-2018, 04:25 AM   #17
Guru
 
catalinajack's Avatar
 
City: Edgewater, MD
Country: USA
Vessel Name: Catalina Jack
Vessel Model: Defever 44
Join Date: Nov 2011
Posts: 915
Quote:
Originally Posted by jleonard View Post
My FL 120 runs at 170 F at the expansion tank with a standard thermostat.
What is a "standard" thermostat? At what temp does your standard thermostat begin to open?
catalinajack is online now   Reply With Quote
Old 12-02-2018, 06:54 AM   #18
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 3,457
Quote:
Originally Posted by catalinajack View Post
What is a "standard" thermostat? At what temp does your standard thermostat begin to open?
The one I got from ADC when I ordered a new one. No clue when it starts to open.

The reason I installed a new one was that I had all the coolant out because I was installing a new circulation pump. Figured I do the thermostat too.

The after temp was the same as the before temp.
__________________
Jay Leonard
Attitude Adjustment
40 Albin
Mystic,Ct. /New Port Richey,Fl
jleonard is online now   Reply With Quote
Old 12-02-2018, 11:14 AM   #19
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 15,996
jlenoard wrote;
"My FL 120 runs at 170 F at the expansion tank with a standard thermostat."

The coolant in the expansion tank is no doubt cooler than in the block. So you're probably running 185 or so in the water jackets and quite likely 195 in places. ... IMO

Isn't the them sensor usually right under the thermostat?
__________________
Eric

North Western Washington State USA
Nomad Willy is offline   Reply With Quote
Old 12-03-2018, 06:58 AM   #20
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 3,457
Per ADC, I am right on the money at 170 there and it's via a mechanical gage that the PO installed (after he went to Bob Smith's class).

At the temp sensor I am at 180 F (on the lower station gage) and that's is verified with my temp gun. (flybridge gage reads about 5 degrees higher)

That's at cruise rpm which is around 1700. If I crank her up to WOT the lower station gage climbs to about 190 and holds there.
__________________

__________________
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 07:50 AM.


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
×