Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 04-14-2017, 06:34 PM   #1
Senior Member
 
Miramar Owner's Avatar
 
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 661
THOR #4488
Generator Oil Change

Help! I thought I would save a few dollars and change the oil in my new Miramar, Onan 5500 generator myself and from what I have read it looks pretty simple. The problem...I CAN NOT remove the filter. The first wrench I bought from Cummins and it actually broke (made of cast aluminum). The next one I purchased from O'Reilly Auto parts and it keeps slipping. You can only see about an 1 1/2 of the filter at the bottom.

Anyone have any answers on how to loosen it or do I just give up and take it in.
__________________

__________________
Miramar Owner is offline   Reply With Quote
Old 04-14-2017, 07:07 PM   #2
Senior Member
 
Brand: Thor Motor Coach
Model: Vegas 24.1
State: Michigan
Posts: 133
THOR #1812
Hmmmm - I have changed many, but on the 7000 and 4000. Never had any issues- always used a wrench I had - got from an auto parts store - that holds on to the bottom of the filter. You SHOULD be able to do it ......

Have had some filters that I either didn't have a wrench for or didn't want to come off - last resort is to drive a screwdriver thru it take it off that way. That has ALWAYS worked! . Channel lock pliers ,or even a pipe wrench can also work if you have space to get in there.

Good luck - don't give up !
__________________

__________________
Stan fowler is offline   Reply With Quote
Old 04-14-2017, 07:19 PM   #3
Senior Member
 
Miramar Owner's Avatar
 
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 661
THOR #4488
The wrench I have goes on the bottom. The problem with the Onan filter is the indentations the wrench is supposed to slip onto are not very big and the wrench just slips around the filter. I have used the screw driver method but usually up closer to where the filter threads on but I can't get to it on the generator. I was wondering about those rubber wrenches ...maybe they would grip better.
__________________
Miramar Owner is offline   Reply With Quote
Old 04-14-2017, 08:29 PM   #4
Senior Member
 
Miramar Owner's Avatar
 
Brand: Thor Motor Coach
Model: Miramar 34.4
State: Iowa
Posts: 661
THOR #4488
I did it!!!!! I found a pair of Oil Filter Pliers at O'Reilly's Auto Parts. It is a slip joint, jaw tooth pliers angled at 20 degrees. This allowed me to get ahold of it at the end. The harder I pushed the tighter it gripped...

I have concluded these are much better than those that slip over the bottom for these small filters.

Stan, thanks for the encouragement...that's what made me decide to try it again.
__________________
Miramar Owner is offline   Reply With Quote
Old 04-14-2017, 09:31 PM   #5
Senior Member
 
Brand: Thor Motor Coach
Model: Vegas 24.1
State: Michigan
Posts: 133
THOR #1812
Cool ! I have also had problems with the filter ends - and there are also a lot of different sizes. But, you would expect the one you got from Onan to work ! Take it back !

Follow directions on installing the new one and it should come off much better. They don't really need to be super tight!
__________________
Stan fowler is offline   Reply With Quote
Old 06-03-2017, 02:36 PM   #6
Junior Member
 
Brand: Thor Motor Coach
State: Texas
Posts: 8
THOR #7434
Does anyone know what oil filter I can use onan the owning brand. I am on the road and don't have the part number to another brand filter or even the onan brand.
__________________
figtaz50 is offline   Reply With Quote
Old 06-03-2017, 03:47 PM   #7
Senior Member
 
SuperD's Avatar
 
Brand: Thor Motor Coach
Model: 2017 Windsport 29M
State: Indiana
Posts: 3,629
THOR #5196
The biggest reason oil filters get stuck is not preoiling the rubber filter gasket. For filters that install vertically I always refill with oil before installing.
__________________
USMC Veteran
FMCA 101070S

Dave & Myra
One day your life will flash before your eyes,
make sure it's worth watching!
SuperD is offline   Reply With Quote
Old 06-03-2017, 06:09 PM   #8
Senior Member
 
Brand: Still Looking
State: Alabama
Posts: 245
THOR #4160
They over tighten the oil filter at the factory and don't put oil around the seal. When you put your new one on, it only needs to be hand tight (a good twist) and then you won't have that problem anymore.

Oil Filter: 0122-0836
Oil: SAE 15W-40 ONAMAX
__________________
Techn0 is offline   Reply With Quote
Old 06-03-2017, 07:52 PM   #9
Senior Member
 
Brand: Thor Motor Coach
Model: S.O.B.
State: California
Posts: 1,195
THOR #3483
Little Oil Filters

There is also a specific filter wrench that can either have two or three ratchets that grab the bottom of the filter and twist with a 3/8 ratchet wrench. They tighten on the filter as you loosen. Don't forget to put a coating of oil on the filter gasket before installing the new one!!!!
__________________
axis earl is offline   Reply With Quote
Old 06-04-2017, 03:25 PM   #10
Senior Member
 
Brand: Thor Motor Coach
Model: 37GT
State: Florida
Posts: 809
THOR #5246
When manuals say not to over tighten oil filters they mean it. I was in a bind and had to use one of those "quicky" oil change places for my SUV recently for two oil changes in a row. On the second one they couldn't get filter off. They said someone over tightened it. When they found out it was them they didn't know what to say.

Took it to dealer. They couldn't get it off and had to break housing. It wasn't that expensive and the "quicky" place paid the bill.

Moral of my story. I change oil in everything I have, except the SUV, and it will always be done at the dealer. I know how tight my filters are put on because I'm the one doing it.
__________________
Full Time in 2017 Newmar Ventana 4369
pulling a 24' enclosed (Mini Cooper/Harley/Kayak)
(traded 2014 Thor Challenger)
US Army 70-73 Retired LEO
Joe-FL is offline   Reply With Quote
Old 06-04-2017, 04:24 PM   #11
Senior Member
 
Hooligan2's Avatar
 
Brand: Thor Motor Coach
Model: 2016 Siesta Sprinter 24ST
State: Florida
Posts: 307
THOR #2812
I've had good results with this filter wrench. 3/8 ratchet fits the bottom https://www.craftsman.com/products/c...r-wrench-sears

__________________
U.S. Coast Guard retired- 1956-1985
Pensacola, Florida
George-the Newfoundland
Lily- the Pug
1972 Moto Guzzi Eldorado
Hooligan2 is offline   Reply With Quote
Old 11-03-2017, 10:27 PM   #12
Senior Member
 
Brand: Thor Motor Coach
Model: Axis 24.1
State: Florida
Posts: 611
THOR #4366
Did ours today; looked every where and searched the net....turns out there is no oil filter on onan 4000 ky. It's got air filter and fuel filter but no oil filter.
Least I don't have to worry about a filter wrench.
__________________
2016 Axis 24.1 E-450 6 spd tranny
300 watts portable solar.
200 watts solar on the roof.
Wrangler JK dinghy
scrubjaysnest is offline   Reply With Quote
Old 11-04-2017, 01:11 AM   #13
Senior Member
 
Yvonnemarc's Avatar
 
Brand: Thor Motor Coach
Model: ACE 30.2
State: Massachusetts
Posts: 260
THOR #8180
Gotta love the ďno filterĒ Onan.
__________________
USN - RETIRED NUKE
Taunton, MA
Yvonnemarc is offline   Reply With Quote
Old 11-04-2017, 02:40 AM   #14
Senior Member
 
Brand: Thor Motor Coach
Model: S.O.B.
State: California
Posts: 1,195
THOR #3483
Quote:
Originally Posted by Hooligan2 View Post
I've had good results with this filter wrench. 3/8 ratchet fits the bottom https://www.craftsman.com/products/c...r-wrench-sears

That IS the best design for the little filters.... I tried to get a glued on filter off my daughter's 2014 Jeep Cherokee with the 2.4 litre engine ( I didn't change it the last time...) This kind of filter wrench finally did it. Of course our 4000 Cummins/Onan has no filter....
__________________
axis earl is offline   Reply With Quote
Old 11-04-2017, 03:26 AM   #15
Senior Member
 
Brand: Thor Motor Coach
Model: Vegas 24.1
State: Michigan
Posts: 133
THOR #1812
It turns out MOST ( not all ) 4000 Onans have no oil filter because they do not have a pressurized oil system - they use the ď splash ď oiling system. Surprised me - I have a lot of bad memories of old Chevy 6s with splash oiling.....😡. Oh, well - I guess they are pretty reliable......
__________________

__________________
Stan fowler is offline   Reply With Quote
Reply

Thread Tools
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


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 02:36 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2