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04-06-2016, 08:07 AM
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#21
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Technical Guru
City: Wilmington, NC
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 6,194
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All motor oils are thick when cold and thin when hot. There is a viscosity vs temp chart for each, with the plot for multi vis oils a bit flatter than single vis.
Anyone with Detroits has probably experienced trying to pour a cold jug of 40wt into an engine in the winter. The stuff barely comes out of the jug.
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04-06-2016, 08:23 AM
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#22
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TF Site Team
City: Jacksonville
Join Date: Nov 2008
Posts: 11,682
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...
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04-06-2016, 09:37 AM
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#23
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Guru
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48 (sold)
Join Date: Apr 2008
Posts: 10,186
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Gosh, Australia or FL cold could be Canada warm. Also, on my engines the engine mounted hand pump works much better to get out the last few liters with warm oil that the pump won't suck out.
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04-06-2016, 10:39 AM
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#24
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Senior Member
City: Southern Baltic
Vessel Name: Sømarken
Vessel Model: AMS 40'
Join Date: Jul 2012
Posts: 188
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Tried once after engine was running for 5-10 minutes only. Took me almost one hour to suck the 13 liter 15-W40 via the dip stick with my hand vacuum pump.
Made that experience I do it since then hot (engine at least one hour under load) ...
best regards / med venlig hilsen
wadden
__________________
best regards / med venlig hilsen
Wadden
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04-06-2016, 10:49 AM
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#25
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Guru
Join Date: Jun 2008
Posts: 5,037
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I have a hose connected to the drain plug and an "oil x changer" pump that doesn't mind cold thick oil.
Years ago when I had to go thru the dipstick it had to be really hot.
__________________
Jay Leonard
Ex boats: 1983 40 Albin trunk cabin, 1978 Mainship 34 Model 1
New Port Richey, Fl
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04-06-2016, 07:23 PM
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#26
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Guru
City: Trenton
Join Date: Apr 2012
Posts: 1,522
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Hot! Hot! Hot!
__________________
Al Johnson
34' Marine Trader
"Angelina"
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08-28-2016, 08:10 PM
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#27
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Member
Join Date: Nov 2015
Posts: 5
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Hello Cal sailors
My original cal cruising 46 hull no 5 came with a Perkins 4.236 engine
For years I could only do max of 14 to 1600 RPM on cruising (6-7 knots)
After much trouble turns out the injectors where clogged or partially clogged
And the marine growth build up in the heatexchanger impeded cruising at higher RPM
cuz of over Heating
NOW that I've got all that resolved, the boat wants to fly
Now I can do 2200 to 2400 RPM in a heartbeat and cruise at 8.5 to 8.7 knots
And water gushes out in the back exhaust like Niagara Falls
What I have discovered now is,
After a 4 hrs trip to Catalina island, (from Marina del Rey ) a mere 28 nautical
Miles away, my engine oil is LOW and requires a top off 1 to 1.5 quarts of oil!
ITS BURNING OIL at much higher rpm
The engine runs smoothly, no overheating no black or blue smoke, good sound
I do see a slight white fog coming out of the exhaust but that may
Be from the coldness of the water and the fact the exhaust spends 1/3 of time
Underwater while cruising
But this oil loss is really annoying and worrisome
The engines runs so well though
The engine hours barely reads 1250 hrs
Had the injector pump and injectors rebuilt last year
The oil and antifreeze is clean, no cross contamination, no visible leak anywhere
Any advise?
I have not tried running at just 15-1600 to see if this persists
Would appreciate any thoughts
Edwin
Cal Cruising 46
MdR
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08-28-2016, 09:48 PM
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#28
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Guru
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 13,333
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Engine oil cooler oil leak?
__________________
BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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08-28-2016, 10:12 PM
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#29
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Member
Join Date: Nov 2015
Posts: 5
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Perkins 4.236 consuming oil
Quote:
Originally Posted by BruceK
Engine oil cooler oil leak?
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How do I diagnose an oil cooler leak?
Edwin
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08-28-2016, 10:16 PM
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#30
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Guru
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 13,333
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I`m no mechanic, but if you pull the oil cooler you may be able to determine if oil is leaking into the water. Maybe a pressure test by a radiator repairer.
Hopefully someone more mechanical contributes to your issue.
__________________
BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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08-28-2016, 10:24 PM
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#31
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Member
Join Date: Nov 2015
Posts: 5
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I will ask and look into this
Thanks for your insight
Edwin
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08-28-2016, 11:01 PM
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#32
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Guru
City: Between Oregon and Alaska
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 3,023
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Changing cold oil leaves much of the dirt in the oil pan and passages. I've seen oil pans that only held 1/3 of the oil because of particle buildup. The owner was oblivious.
I have a centrifuge and plumbed my engines to drain via a gear pump. Occasionally I drain the engine oil after running and centrifuge it. My plan is to greatly extend the engine life. When I have the oil tested, it comes back as almost new oil. I haven't actually changed oil in 5 years.
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08-28-2016, 11:20 PM
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#33
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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Quote:
Originally Posted by edwmama
I will ask and look into this
Thanks for your insight
Edwin
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Take it to a shop and have them clean it and pressure test it.
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08-29-2016, 06:38 AM
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#34
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Guru
Join Date: Oct 2007
Posts: 22,553
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Change over to single viscosity oil if you now use multi weight.
If the oil burn expense is still too high a Viscosity thickner like Howes (at a truck stop) might help.
My guess would be the low power operation in the past may have stuck the oil scraper ring. If so lots of high power use with an immediate hot oil change might help.
It takes both heat and time for the detergents you paid for in the oil to work, so give the engine both.
The most modern oils have far better detergents to make up for the built in inefficiencies for the Air Police so a higher grade of detergent oil might help.
A bunch of oil changes back to back (25hours) might cost as much as just dumping in a quart every so often?
If the past light loading burnished the cylinder bores a compression check will show it.
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08-29-2016, 06:53 AM
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#35
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Senior Member
City: Bucksport, Maine
Vessel Name: T/T Whistful
Vessel Model: Boat US 12' Inflatable
Join Date: Jul 2011
Posts: 242
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Quote:
Originally Posted by Lepke
Changing cold oil leaves much of the dirt in the oil pan and passages. I've seen oil pans that only held 1/3 of the oil because of particle buildup. The owner was oblivious.
I have a centrifuge and plumbed my engines to drain via a gear pump. Occasionally I drain the engine oil after running and centrifuge it. My plan is to greatly extend the engine life. When I have the oil tested, it comes back as almost new oil. I haven't actually changed oil in 5 years.
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I read some posts on RV forums by guys running big diesels tons of miles that take the same approach. They do an oil test every 5k-7.5k miles, and only change oil when the test indicates it's required. Some engines take 40+qts of oil, and if you run a lot of miles (hours for us) that expense can add up quickly.
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08-29-2016, 07:32 AM
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#36
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Guru
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
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Depending on installation level engines may use oil until they get to the proper level for the installation angle. Dip sticks are not always calibrated properly for the install and factory capacity is for a flat install. You may want to try letting the oil go down a bit and see if it continues to go lower or stops using at that level.
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08-29-2016, 07:44 AM
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#37
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Guru
Join Date: Oct 2007
Posts: 22,553
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OIL does not wear out , but the additive package does get consumed.
It is there for a reason.
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08-29-2016, 07:52 AM
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#38
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
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SeaFoam may unstick the rings.
I don't see how anybody can justify changing oil cold. Just lazy perhaps. Like Al Johnson says .. Hot Hot Hot.
__________________
Eric
North Western Washington State USA
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08-29-2016, 08:31 AM
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#39
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Guru
City: gulf coast
Join Date: Jun 2014
Posts: 3,440
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Eric try wrestling a 1 quart big hot oil filter from the outside of an engine and you may reconsider.
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08-29-2016, 08:43 AM
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#40
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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: 12,834
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I pump mine out hot after an extended cruise as I feel it's more likely to have any particulate suspend in the oil and it's easier on the pump. Change the filter the next day when it's cool and pour in the new oil.
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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