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change impeller cummins diesel
- Thread starter Jackcash
- Start date
Just Dreamin'
Well-known member
- Joined
- Jun 21, 2010
- Messages
- 191
- Fluid Motion Model
- C-248 C
- Hull Identification Number
- FMLT2507F809
- Non-Fluid Motion Model
- Bass Tracker Targa 18 W/T
- Vessel Name
- Just Dreamin'
- MMSI Number
- 338129907
We have a MY '09 ('08 build) R25 classic with the Cummins 150 and the impeller change takes me about 45 mins to an hour to complete. My first attempt at changing took about 2 hours as I used needle nose pliers to extract the impeller off the key way and, to say the least, it was not easy (almost one vane at a time) until it finally broke free. Installation of new one also was interesting trying to keep vanes heading in proper rotational direction. Two lessons I learned from the first change: (1) use an impeller puller which makes removal very easy and (2) use a small zip tie to hold new impeller vanes in the proper rotational direction while installing (snip it off once it starts on the keyway). Also use a non solvent based lub such as dish soap to install the new impeller. The impeller is located on the port side of engine in the area of front engine mount. I access from cockpit and to give me a little more arm room I remove the ECM ( four bolts and unplug). Not that difficult to change. To me the most difficult part is working my arms and body down to lower port side of engine as I am not quite as flexible as I once was! PM me with your email and I will send an extract from engine service manual on impeller change if you would like.
Levitation
Well-known member
- Joined
- Aug 12, 2009
- Messages
- 1,300
- Fluid Motion Model
- C-248 C
- Hull Identification Number
- fmlt2510f809
- Vessel Name
- Charlotte Ann
Just Dreamin' pretty well nailed it - he forgot to mention long arms help :mrgreen: so find a flat bellied teenager who will reach in there for you.
You will want a puller. The problem is that the Cummins impeller/housing are exactly between the two sizes of jaws on the puller commonly available - too big for the small and too small for the big. After the first two times I whittled out a new set of jaws for the puller so they fit properly. If your impeller has not been changed in a while it will resist being removed. Use silicone on the shaft before you install the new one. Syl-Glide at NAPA stores is inexpensive and also works well on your sliding windows.
A nice touch is to get the aftermarket thumbscrew cover for the impeller housing so that you don't have to fumble with a tool while being not able to breath hanging over the hatch on your belly.
You will want a puller. The problem is that the Cummins impeller/housing are exactly between the two sizes of jaws on the puller commonly available - too big for the small and too small for the big. After the first two times I whittled out a new set of jaws for the puller so they fit properly. If your impeller has not been changed in a while it will resist being removed. Use silicone on the shaft before you install the new one. Syl-Glide at NAPA stores is inexpensive and also works well on your sliding windows.
A nice touch is to get the aftermarket thumbscrew cover for the impeller housing so that you don't have to fumble with a tool while being not able to breath hanging over the hatch on your belly.
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