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Replacing the crankshaft position sensor on 5.7

70K views 15 replies 10 participants last post by  tmh  
#1 ·
Is the Crankshaft position sensor easy to change on the 5.7? I've searched around and havnt found much talk about it...I looked up the location of it, and it seems like it's pretty hidden behind the motor?

Is it easily accessible from under the hood? or do you have to pull off the wheel well lining and go through the pass. side wheel well?


Anybody?
 
#2 ·
Thanks to the help I got here I figured out that I needed to replace the crankshaft position sensor. I just finished the job. Not much to it really. I have a 2005 5.7 Hemi. My unit was located on the right rear of the engine block just above the oil pan.

There was nothing to remove. I just put the front end up on my ramps and crawled under the engine on the right side with a trouble light. There is a hole in the frame work and you can look right up there and see the sensor with a green plug hooked to it.

The sensor is held in with one 3/8 or 5/16" headed bolt, remove it then just twist the unit to pull it from the block. After that remove the plug by sliding the white latch part. When putting the new one in be sure not to over tighten the bolt and maybe break it off. I read here some where that someone had done that. I took mine off and reinstalled the new one with a 1/4 rachet. Breaking the bolt would ruin your day if not your week.

This seems to have fixed my problem....and man did it act wierd. Good luck....hope this helps.

Barry
 
#6 · (Edited)
2006 jeep commander limited 5.7 hemi

THANK YOU!!!!
Thank you so very much for this thread.
Today my engine light came on with a noticiable relay. On my way up a hill it quickly proceeded to flash, and then the traction control light (slippery road light) came on. With a deep sigh, I thankfully made it back home, and from research over the web, I found a video of how to self check diagnostics by quickly turning the key 3 x's to "on."
Lo and behold it stated the code P0335, which I looked up and found it to be the crankshaft position sensor. I called the 2 Jeep dealerships here in KC and to order the part was $50-$57, and to have them install it would cost an extra $61-$110.
I called the auto parts store, purchased it for $23, and installed it myself. I have never worked on my own car before and this was super rewarding. I did find that oil had spilled onto the sensor and when I removed it, it was saturated on the inside. Coincidentally, issues started arising a month ago after routine maintenance, which included an oil change. Truly I would have paid them the 23 bucks to have as much fun as I did today...minus the moments of trying to stay calm on my drive home with my 3 young barefoot babes inquistively asking about the flashing lights on the dash and hollering for H2O, which I did not have...in 100 degree weather. Woohoo! Exciting day :)
Thanks again for the helpful advice!!!
 
#8 ·
FWIW, I carry a spare crank and cam sensor in each of my Hemi vehicles. Although they don't fail that often, a failure of either one could leave you stranded. As said the crank sensor is relatively easy to change and the cam sensor is even easier. IMO, cheap insurance......about $50 for both.
 
#12 ·
So, seemed like a very easy project (thanks to this forum - Thanks all) BUT, like Kurtis, I can't get the darn sensor out of the harness connector. It looks simple but no matter where I grab and pull it doesn't budge. Anyone know how to get these off? All the write ups and videos just say "remove the connector" - so I assume it's supposed to be easy. 3 hours later all I have to show is sore fingers!
 
#11 ·
Here's the 5.7's removal and installation procedure from the FSM:

REMOVAL

5.7L
The Crankshaft Position (CKP) sensor (4) is located at
the right-rear side of the engine cylinder block (1). It is
positioned and bolted into a machined hole in the
engine block.
1. Raise vehicle.
2. Disconnect CKP electrical connector (2) at sensor.
3. Remove CKP mounting bolt (3).
4. Carefully twist sensor from cylinder block.
5. Remove sensor from vehicle.
6. Check condition of sensor o-ring.

INSTALLATION

5.7L
CAUTION: Before tightening sensor mounting bolt,
be sure sensor is completely flush to cylinder
block. If sensor is not flush, damage to sensor
mounting tang may result.
1. Clean out machined hole in engine block.
2. Apply a small amount of engine oil to sensor
o-ring.
3. Install sensor (4) into engine block (1) with a slight
rocking and twisting action.
4. Install mounting bolt and tighten to 28 N·m (21 ft.
lbs.) torque(3).
5. Connect electrical connector (2) to sensor.
6. Lower vehicle.
 
#16 ·
Is that while you squeeze some part of it? It clearly has some specific way to at least allow it to come free with screwdriver force, right. It looks like some sort of clip ring (Oval shaped) on the sensor end of the connector the hooks the sensor in. Does that need to be moved or did you wiggle it right through that spot? Thx.