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10-20-2016, 08:48 AM
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#1
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Guru
City: Houma, Louisiana
Vessel Name: M/V LUNASEA
Vessel Model: 45ft Bluewater Coastal
Join Date: Aug 2014
Posts: 529
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Engine Oil Change
Should oil be changed when engine is hot or cold???
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10-20-2016, 09:11 AM
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#2
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Enigma
City: Slicker?
Join Date: Oct 2007
Posts: 16,540
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Greetings,
Mr. k. The general consensus is a HOT oil change. Any contaminants should be in suspension, hot (thin) oil flows much better than cold.
__________________
RTF
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10-20-2016, 09:15 AM
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#3
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Guru
City: Cary, NC
Vessel Name: Skinny Dippin'
Vessel Model: Navigator 4200 Classic
Join Date: Jul 2009
Posts: 5,841
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Neither. I have always been told (although via auto techs many years ago) to run the engine to warm up the oil, let is sit for a little while, then change it warm.
But hey... what do I know. I assume different manufacturers probably have different ways the recommend. May want to check your service manual or call a diesel shop and see what they say.
__________________
2000 Navigator 4200 Classic
(NOT a trawler)
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10-20-2016, 09:17 AM
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#4
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Senior Member
City: Toronto ON
Join Date: Aug 2016
Posts: 128
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Hot, every manufacturer's materials suggest warmed up.
Following a run, warm oil flows better than cold,
contaminants in the oil are more likely to be in suspension, vs settled out in the pan, so they will get out... which is primarily why we change the oil...
with a practical caveat: if engine parts are going to burn you doing it "hot", your eternal salvation won't be put in jeopardy by waiting a short while for that particular external to cool a bit...
Or, is this topic similar to anchor selection?
RB
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10-20-2016, 09:44 AM
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#5
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,738
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Hot
And that reminds me I need to do dat.
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Eric
North Western Washington State USA
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10-20-2016, 10:07 AM
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#6
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Guru
City: Cape May, NJ
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,947
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Hot. Let it cool enough to not be burned on contact. IE ~140F oil temp.
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Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May, NJ
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10-20-2016, 10:27 AM
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#7
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Guru
City: Maine Coast
Vessel Name: Tortuga
Vessel Model: Nunes Brothers Raised Deck Cruiser
Join Date: Feb 2015
Posts: 889
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Hot but largely because the oil flows better. I just did mine yesterday and despite warming the engine up it still took 40 minutes for the oil to drain out. Note that me engine has a drain hose plumbed into the pan and oil removal is done through the 1/8" ID hose by gravity flow, so it is SLOW. Cold the oil would take hours to drain through that hose. On my other boat there is a metal tube plumbed in to the bottom of the pan with an oil change pump attached. Warm that engine can be drained of oil in under a minute.
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10-20-2016, 11:22 AM
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#8
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Guru
City: Southern Maine
Vessel Model: Prairie 36 Coastal Cruiser
Join Date: Dec 2012
Posts: 2,714
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Quote:
Originally Posted by TDunn
On my other boat there is a metal tube plumbed in to the bottom of the pan with an oil change pump attached.
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I have two of these (oil change pumps), but one has failed. They're gear pumps with a plastic housing, but they look pretty rugged. That model is no longer for sale.
I've used cheap-o ($15) pumps from Amazon, but they're clearly very frail, and I've already burned one out by running it for too long (trying to transfer fuel).
I've also seen expensive ($150-$200+) pumps advertised. I can burn out a lot of cheap-o pumps before that becomes cost-effective.
Any other options?
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10-20-2016, 12:10 PM
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#9
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Guru
Join Date: Jun 2008
Posts: 5,034
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I go either way (on the oil change that is, hot or cold). I have a hose at the bottom of the oil pan and my pump doesn't much care if the oil is cold, still only takes a couple of minutes max.
__________________
Jay Leonard
Ex boats: 1983 40 Albin trunk cabin, 1978 Mainship 34 Model 1
New Port Richey, Fl
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10-20-2016, 12:56 PM
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#10
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Enigma
City: Slicker?
Join Date: Oct 2007
Posts: 16,540
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Greetings,
Mr. CT. I use a Reverso pump plumbed into the drain plug in the engine sump. Other than a worn out impeller (easily changed and not expensive) it has worked flawlessly over 10+ years. Similar to one of these BUT with a neoprene impeller. (old style, I suppose) Reverso DC Pumps
Yup, expensive.
__________________
RTF
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10-20-2016, 01:04 PM
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#11
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,738
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I do it hot and have never come close to comming in contact w the hot oil. I freqiently use the plastic jugs that you buy distilled water in at the Safeway store. I usta worry about the plastic melting and having hot oil in the bilge. Never has happened and I frequently have used better containers.
But I get everything ready to do the pump out as soon as the engine stops. Just to minimize things settling out of the oil. Perhaps it's a waste of effort. I'm not sure but I do what I do. I do the same w my cars.
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Eric
North Western Washington State USA
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10-20-2016, 01:08 PM
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#12
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Guru
City: Punta Gorda, fl
Vessel Name: Escapade
Vessel Model: Nordic Tug 37 2002
Join Date: Jan 2015
Posts: 1,231
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[emoji106] Always when the oil is hot.
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10-20-2016, 02:55 PM
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#13
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Guru
City: Thibodaux, Louisiana
Vessel Name: Gumbo
Vessel Model: 2003 Monk 36
Join Date: Oct 2007
Posts: 3,882
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Quote:
Originally Posted by TDunn
Hot but largely because the oil flows better. I just did mine yesterday and despite warming the engine up it still took 40 minutes for the oil to drain out. Note that me engine has a drain hose plumbed into the pan and oil removal is done through the 1/8" ID hose by gravity flow, so it is SLOW. Cold the oil would take hours to drain through that hose. On my other boat there is a metal tube plumbed in to the bottom of the pan with an oil change pump attached. Warm that engine can be drained of oil in under a minute.
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Do you know why such a small ID (1/8") hose for your oil drain? It seems strange.
I change my oil hot about 14qts., up through a tube, not dipstick tube, with an engine mounted hand pump. A lot of pumping but it doesn't take too long.
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10-20-2016, 03:05 PM
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#14
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Guru
City: North Charleston, SC
Join Date: Sep 2010
Posts: 4,869
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Hot.
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10-20-2016, 03:35 PM
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#15
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Dauntless Award
City: Wrangell, Alaska
Vessel Name: Dauntless
Vessel Model: Kadey Krogen 42 - 148
Join Date: Jan 2013
Posts: 2,820
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Quote:
Originally Posted by Tom.B
Neither. I have always been told (although via auto techs many years ago) to run the engine to warm up the oil, let is sit for a little while, then change it warm.
But hey... what do I know. I assume different manufacturers probably have different ways the recommend. May want to check your service manual or call a diesel shop and see what they say.
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The ONLY reason they say to wait after running the engine is that the lawyers wrote the manual. they don't want you to get BURNED and sue thier asses.
Otherwise please tell me the logic, oh wait, I'm in the wrong place for that. Sorry
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10-20-2016, 04:46 PM
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#16
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Guru
City: Beverly Hills
Join Date: Feb 2012
Posts: 1,371
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Warm oil to normal operating temperature. I use a hand evacuation oil change pump ( Mueller ) and it makes the removal much easier.
I usually carry enough spare oil to do a engine, generator and engine transmission change in case in not near a retailer. I found a yesterday that one of the gallon bottles of Rottela 15W40 had leaked at one of the bottom corners, looks to me like the containers are not as sturdy as they used to be. I store them in a fluid tight bin so the spill was contained. I padded the new spare oil on oil spill diapers to give them a softer surface. If you carry spare oil containers it might be worth checking.
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10-21-2016, 04:26 PM
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#17
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Guru
City: Cape Cod
Vessel Name: Slip Aweigh
Vessel Model: Prairie 29
Join Date: Oct 2013
Posts: 1,219
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Hot. But i always toss down another quart as it finishes draining out as a 'final flush'. Purely personal opinion as to its effectiveness.
Bought a Fumoto oil pan valve. Best $45 bucks I've spent. Almost no mess on an oil change. And very little mess on changing the filter (just technique).
Or you could have your local shipyard or yacht guy do it for ya.
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10-21-2016, 05:38 PM
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#18
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,817
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Hot after cruising. Have oil change pump plumbed into oil pan drain. Stick the hose in a waste oil container and turn on the pump. No way to get burned. Change the filter after its cooled down.
Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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10-21-2016, 07:37 PM
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#19
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Veteran Member
City: Rochester, NY
Join Date: Sep 2016
Posts: 46
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Most Beta engines include a built in, integrated oil change hand pump into their engines. Is this considered desirable or just fluff? If it's desirable, is this a common aftermarket upgrade that you guys make.
I know it's relatively tight quarters in most engine rooms, I assume removing an oil change plug can be a challenge.
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10-21-2016, 07:49 PM
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#20
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Guru
City: Groton, CT
Vessel Name: Datenight
Vessel Model: North Pacific 45
Join Date: Jan 2008
Posts: 1,103
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Quote:
Originally Posted by cappy208
Hot. But i always toss down another quart as it finishes draining out as a 'final flush'. Purely personal opinion as to its effectiveness.
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Cappy,
I thought I was the only crazy guy who did that!
Rob
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North Pacific 45
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