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08-24-2015, 09:00 PM
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#1
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Junior Member
Join Date: Jan 2014
Location: Haverhill,MA
Posts: 20
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Changing Oil on a Onan 4kw Genset?
This may seem like a silly problem but I can't remove the 2 screws that hold the oil drain hole cover on. I have a 2014 Sunseeker Model 2250LE. There isn't much space between the bottom of the generator and the ground so I can't see them very well. I thought they were philips screws but they look more star shaped. My philips screwdriver doesn't fit the head of the screws. The Onan manual doesn't mention anything about what these screws are. It just says to remove them to get at the drain plug. The July issue of Motorhome also talks about removing the 2 screws on page 85 "Simply remove the two screws...". Are these screws really philips and I have the wrong size philips screwdriver or are they special screws with a star shaped head?
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08-24-2015, 09:29 PM
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#2
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Senior Member
Join Date: Jun 2013
Posts: 188
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Its a star shaped head... "T35" or "T40" one of those. Pick up a set of "T" bits.
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2011 Sunseeker 3170DS - 30,000 miles explored
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08-26-2015, 08:18 PM
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#3
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Senior Member
Join Date: Apr 2013
Posts: 202
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__________________
2014 Sunseeker 3050S
Honda CRV (TOAD)
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08-26-2015, 08:29 PM
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#4
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Senior Member
Join Date: Jul 2015
Posts: 291
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They have mine installed directly above the trailer beam. I was thinking of adding a Fumoto valve. Anyone done that? May be a good option for the OP as well.
Yes, you need T30 torx bit for the cover and I think it was a 9/16th socket for the plug.
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2015 XLR Nitro 30FQSL
2015 F250 King Ranch
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08-27-2015, 12:58 AM
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#5
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Senior Member
Join Date: Mar 2015
Location: Utah
Posts: 642
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Quote:
Originally Posted by wesslvm
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Good video link, thx.
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08-27-2015, 09:04 AM
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#6
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Site Team
Join Date: Oct 2014
Location: North Georgia
Posts: 2,887
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Quote:
Originally Posted by oldgold
They have mine installed directly above the trailer beam. I was thinking of adding a Fumoto valve. Anyone done that? May be a good option for the OP as well.
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Not yet... But it is on my list of "to-do" along with a short drain hose to make it easier to keep it clean when changing the oil.
__________________
Wayne
2024 Sunseeker 2150SLEF / Ford E-350 chassis on order.
2024 Coachmen Northern Spirit 1943RB
2021 F-150 4X2 SuperCrew Lariat 502A, 3.5L Powerboost Hybrid, 3.55 gears, Tow Technology Package, Tow Mirrors, 1,840# Cargo, 7,000# Tow, 7.2KW Pro Power, Sumo Springs, A.R.E. Z2 Topper
It is better to have too much truck than to have too much trailer.
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08-27-2015, 06:29 PM
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#7
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Senior Member
Join Date: Apr 2012
Location: South Carolina
Posts: 1,441
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To simplify oil changes on my Sunseeker, I replaced the access plate's Torx cap screws on my Onan with regular hex head cap screws. I don't remember the thread size. I put a label on the generator with the access plate and drain plug hex sizes.
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RamblerGuy
2011 Sunseeker 3100
2016 Ford Edge Toad
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08-30-2015, 11:32 PM
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#8
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Junior Member
Join Date: Aug 2015
Posts: 2
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I found the videos helpful, as they did identify that the screws on the plate covering the drain plug are a Torx T30. However, the drain plug on my 4000 generator was not a 9/16", but was metric (12 mm). Also my drain plug had a crush washer, so I had to stop and take some time to go source a new crush washer. (Note a crush washer is a thick aluminum washer that is compressed when tightening the plug, and is intended to only be used one time only.) In some ways I was happy to see the crush washer as it took away any concerns about potential leaks, as they work very well.
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10-24-2015, 07:25 PM
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#9
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Member
Join Date: Jan 2015
Location: Beaumont, TX
Posts: 83
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Quote:
Originally Posted by RedLdr1
Not yet... But it is on my list of "to-do" along with a short drain hose to make it easier to keep it clean when changing the oil.
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Thinking of doing this as well, just dont know the thread size for the valve
__________________
2014 SunSeeker 3170DS
Ford F-450
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10-26-2015, 07:44 AM
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#10
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Senior Member
Join Date: Jul 2014
Location: Lake Wylie
Posts: 502
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Couple questions
Other than Dino 10w30 that Tito used in the Video,any other recommendations on oil?Someone once told me Onan gen sets use a specific oil.
We are fair weather campers in the south
Also Tito in the video used a thread sealant on the drain. I've never heard of using this.Wouldn't there be a possibility of contaminating the oil?
Compression washer sounds like a better option to me.
__________________
I never saw a Hearse towing a Trailer
'71 Dads VW camper pop up Van
'78.....tents
'93 Coleman pop ups (I'm Dad)
'04 Fleetwood Jamboree 26q
'14 Sunseeker 2860DS
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10-26-2015, 07:55 AM
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#11
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Senior Member
Join Date: Nov 2010
Location: Palm Beach Gardens, FL
Posts: 115
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mine came with some paper tags on the cover that said it has 15w40 installed.
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2010 sunseeker 3100ss
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10-26-2015, 08:03 AM
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#12
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Citrus County, Fl.
Join Date: Apr 2014
Location: Hernando, Fl
Posts: 2,368
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Quote:
Originally Posted by trdutch
Compression washer sounds like a better option to me.
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Honda Goldwings all use the "crush washer" and I guarantee you will never see a drop of oil under a Goldwing.
10 Pack of Crush Washers - Honda Gold Wing Parts & Accessories by WingStuff.com
__________________
2016 Forester 3011DS
2017 Toyota Corolla SE toad
PREVIOUS: 2015 Flagstaff 832IKBS
99 Terry 31G
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10-26-2015, 12:56 PM
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#13
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Senior Member
Join Date: Jul 2015
Posts: 291
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Quote:
Originally Posted by jk31668
mine came with some paper tags on the cover that said it has 15w40 installed.
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X2. We use 15w40. Depending on operating ambient temps... I believe straight 30 weight or 10w30 are acceptable per the manual.
__________________
2015 XLR Nitro 30FQSL
2015 F250 King Ranch
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10-26-2015, 02:05 PM
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#14
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Senior Member
Join Date: Aug 2013
Posts: 143
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Quote:
Originally Posted by trdutch
Couple questions
Other than Dino 10w30 that Tito used in the Video,any other recommendations on oil?Someone once told me Onan gen sets use a specific oil.
We are fair weather campers in the south
Also Tito in the video used a thread sealant on the drain. I've never heard of using this.Wouldn't there be a possibility of contaminating the oil?
Compression washer sounds like a better option to me.
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Correct, I would not use tread sealant. It will contaminate the oil. Never used it on mine and it doesn't leak.
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10-26-2015, 03:17 PM
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#15
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Senior Member
Join Date: Nov 2010
Location: Palm Beach Gardens, FL
Posts: 115
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I changed over to full sunthetic last time
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2010 sunseeker 3100ss
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10-26-2015, 05:42 PM
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#16
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Senior Member
Join Date: Jul 2015
Posts: 291
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Quote:
Originally Posted by jk31668
I changed over to full sunthetic last time
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I was told by the head Cummins/Onan mechanic not to use synthetic, I wild have thought it would be better. He said the molecules were smaller and more able to make their way out of the system. Not sure how true all that is, but I would check your oil level often just in case he knew what he was talking about. He said a high end 15w40 regular oil is the best option with straight 30 weight a close second.
__________________
2015 XLR Nitro 30FQSL
2015 F250 King Ranch
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10-27-2015, 06:31 PM
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#17
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Senior Member
Join Date: Oct 2012
Posts: 660
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Quote:
Originally Posted by rbetzwieser
Correct, I would not use tread sealant. It will contaminate the oil. Never used it on mine and it doesn't leak.
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I've used teflon wrap on every drain bolt on every oil change I have done...
Several hundred in many vehicles.
I have never had a leak and have never hurt an engine- any type.
And I never buy new washers. Just be careful.
Don't over use it and it won't get into the crankcase.
Nobody changes my oil but me. (except on my company car- it's theirs)
Over 35 motorcycles and ATV's, cars, trucks, gennies, lawn equipment- anything with a motor.
25 oil changes just on my wifes last car.
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