Community Forums

dwaugh10 · 07-12-2020, 02:46 PM

I've always changed my own oil and filters in the past on gas coaches. My new diesel coach isn't due for awhile, so I started looking at what was needed to do an oil change. Finally found the oil filter.... how in the world do you reach this thing and unscrew it????

Its located between the frame rail and engine with a heater hose (DEF heater?) below it!

Gary RVRoamer · 07-12-2020, 03:37 PM

One of those socket-type filter wrenches that slip over the bottom. Then maneuver around the hose as best you can.

I'd also consider a mod to re-route that hose a bit, if practical.

Skip426 · 07-12-2020, 04:06 PM

Then the fun starts ; not only is it a !@#$#@! to remove , but Cummins wants the new filter filled and tightened 3/4 turn after first seal ring contact .

Hint on the 3/4 turn , because you won't be able to see the sides of the filter , put a line with an ink marker on the bottom of the filter , before you fill it with oil.

Then when looking up at the filter you know how far you've turned it.

BTW: Be very sure the old filter seal ring has come off with the old filter , sometimes the paint that's used on the engine will stick it to the housing .
Do not ask how I know this .

gmc70 · 07-12-2020, 04:45 PM

Just another brilliant example of engineering from some desk jockey.

Skip426 · 07-12-2020, 04:56 PM

Quote:

Originally Posted by gmc70

Just another brilliant example of engineering from some desk jockey.

Actually the view/access, of the OP's filter isn't that bad ; you ought to see the way the 6.7 is installed in the Dodge/Ram trucks for access.

The advent of CAD ( Computer Aided Drawings ) for engineers was a nightmare for mechanics. The program would say if a part would fit in a space ... but without any idea of how to access it for service/replacement .
When the service manual instructions start , remove the rear engine mount , loosen the front mounts , and lower the rear of the engine 6" ... just to access the rear three spark plugs, on a V-6 front wheel drive. You know you're in trouble.

dwaugh10 · 07-12-2020, 05:14 PM

I can hardly wait for all the oil that’s going to spill getting it out

Anyone know what size of filter wrench will fit on the bottom?

David

Bob_C · 07-12-2020, 06:33 PM

Go to the parts store and check for what will fit on a new filter.....

rte154 · 07-12-2020, 07:06 PM

Go online and google 3 finger oil filter wrench. I don't remember what brand i purchased but they are all similar. Has worked very well for me including that first time factory tight filter removal. I have been surprised on every filter removal that little to no oil ran down the side of the filter. I did manage to hold my heater hose out of the way with a cable tie.

jimcumminsw · 07-13-2020, 02:35 PM

Quote:

Originally Posted by Skip426

Actually the view/access, of the OP's filter isn't that bad ; you ought to see the way the 6.7 is installed in the Dodge/Ram trucks for access.: blink:

The way this was explained to us at the 2013.5 Cummins Rally is the engine has been around since the mid-80's, 5.9L with the filter in this location. The Dodge model. The filter location was carried over on to the 6.7L engine since it is really a bored out 5.9L block. This location was fine until the new 2013.5 and up trucks was redesigned to increase the carrying capacity of the new model trucks. The Frame was strengthen and additional support was added to the front portion of the frame.

FCA design team asked Cummins if the filter could be moved, once it was recognize that it would be difficult to service. Cummins said no it would take a complete new block design so, FCA said OK leave it.

I have checked and service a friend's newer truck 2016 DRW. I removed the passenger side wheel and was able to access the filter over the top of the lower rail on the frame. Leaving the inner wheel will covering in place. Not ease but doable.

jimcumminsw · 07-13-2020, 02:47 PM

Quote:

Originally Posted by dwaugh10

I can hardly wait for all the oil that’s going to spill getting it out

Anyone know what size of filter wrench will fit on the bottom?

David

If this is the standard Cummins Oil filter for the 6.7L engine. You can purchase an oil filter wrench from Geno's Garage that fits the bottom of the filter and the flutes. The oil wrench cap is a machine Billet AL cup design, that use a 3/4 socket drive. This fits a 93mm filter with 15 Flutes such as LF3972 and or LF16035 filters. Not cheap, but works great and is worth the cost in my opinion.

I have had my filter wrench since I purchased my truck in 2008, after I did my first oil change!

Their part number is LT-93MM-Socket

They also sell an oil filter plug to prevent spilling of oil when changing the oil, screws into the filter threads. Part number LC57180

mackwrench · 07-13-2020, 03:15 PM

I use a strap type wrench in many filters. You can put a 1/2" drive extension on it and get rachet below filter where your leverage is better.

....I also take a old screwdriver and knock a small hole in bottom of filter to let it drain before removal.

https://www.amazon.com/ATD-Tools-537.../dp/B000OV31FQ

asuperheat · 07-22-2020, 06:21 PM

Quote:

Originally Posted by mackwrench

I use a strap type wrench in many filters. You can put a 1/2" drive extension on it and get rachet below filter where your leverage is better.

....I also take a old screwdriver and knock a small hole in bottom of filter to let it drain before removal.

https://www.amazon.com/ATD-Tools-537.../dp/B000OV31FQ

This is how I did it on my 6.7 and how I now do it on my 8.9. was fairly easy on both motors.

RichKimball · 07-23-2020, 08:07 AM

Quote:

Originally Posted by jimcumminsw

If this is the standard Cummins Oil filter for the 6.7L engine. You can purchase an oil filter wrench from Geno's Garage that fits the bottom of the filter and the flutes. The oil wrench cap is a machine Billet AL cup design, that use a 3/4 socket drive. This fits a 93mm filter with 15 Flutes such as LF3972 and or LF16035 filters. Not cheap, but works great and is worth the cost in my opinion.

I have had my filter wrench since I purchased my truck in 2008, after I did my first oil change!

Their part number is LT-93MM-Socket

They also sell an oil filter plug to prevent spilling of oil when changing the oil, screws into the filter threads. Part number LC57180

My motorhome 6.7 engine calls for a LF3970 which has no flutes on the bottom so the wrench won't work. (That billet wrench is way expensive anyway. Lisle sells one for $6.) Too bad. The LF3972 has a different sized opening and doesn't fit on motorhome engines. It's a Dodge thing as far as I know.