r/leaf • u/_Evening-Rain_ • 1h ago
Overhauling your entire front end 2017 Leaf (USA) and older leaf ride quality tips.
2017 Leaf S /w 120K miles. 7/12 health bars. 1,500 quick charges.
Recently I had the luxury of re-building my entire front end because im too broke for the mechanic. It originally was going to be just a few parts, but once I got in I decided to do the rest of it. If a dudes whos partly disabled from a moped accident can do it; you can too! The main things I was looking to correct was:
-The axle click plague (cars had this most of its life with no fix)
-Recently, Click/heavy metal sound/shift on on heavier stop/acell (not axle). Most likely lower control arm bushings
-Cars bouncy and feeling slightly more sloppy than usual even with new struts and rear shocks. Spoiler its probs the lower control arms.
-At very low speeds, usually when initially backing up or moving forward, tapping sound that matches speed. Sounds like brakes. Random on when it shows up.
-Very uneven pad wear. Inner brake pad wears much faster than outer. I think if these pads didnt wear unevenly and I checked them earlier they would of lasted at least 200K.
Need less to say she needed some work. Ill list all the parts below. If you are USA and look to DIY any of this I recommend to get your parts from Rock Auto. Cheap parts, fast and cheap shipping, and hasn't let me down yet.
I accidentally bought two boxes of brakes so I sadly now have new front brakes for the next half a million miles.
SOME TIPS:
-I ended up buying new knuckles that where painted because the old ball joint studs where rust seized to the knuckle. I tried everything but heat and physically cutting to try and get them apart. They're not that expensive and can save you a lot of time.
-To get the speed sensors out I took the wheel hub out, sprayed both ends with PB blaster, waited 10 mins, and took a small screwdriver to pry around the edges to break it free. Then pry it out. The wire goes behind the plastic in the wheel well to a connector. Or just leave it connected and out of the way.
-The passenger CV axle has a carrier bearing. You wont be able to pull it right out like the driver side. Que me trying to King Kong that thing out slamming it back and forward and wondering why its not budging. Under the car you just take out a few bolts and the bracket comes right off.
-I used a C clamp and the old brake pad to push the brake pistons back. Its a little weird since you cant position the c clamp directly behind the piston due to the brake hose connector being there, but its possible without too much of a struggle. Be sure to watch your brake fluid level as you do this so it dont overflow. Also remember when you pump the brakes for the first time, it will take some fluid with it so keep the brake fluid slightly above the max mark.
-The differential seal that you replace with your CV axles is different for each side. Part number 38342-8E000 and 38342-8E001. I didnt personally replace them because I had no easy way or proper tool to get them out. Guess we're going to stress test those OEM seals. I did buy and confirm the new part though.
-I had to cutoff the swaybar end links, grind down the bolt, then punch it through. Nissan made sure the OEM's are hell to get off even after you cut them off. I'd recommend to try PB blaster and, if that doesnt work, heat with an impact first. Top bolt should be easier than bottom bolt.
-EXPERIMENTAL: I think the uneven wear between the inner and outer brake pads is due to the bottom sliding pin. The bottom one has a rubber bit at the end to help vibrations, noise, and perhaps stabilize everything. No matter what I did I couldnt get this thing to slide easily, even with all new hardware. Instead i put the new all metal top pins in the bottom and called it a day. Kept old top pins. So far they seem to be fine. I gave them a wiggle and compared to the top bores they feel the same in the bottom. Should work fine. We'll see in time. Dont get sliding pin boots for cheap or from rock auto. they are junk. Only ones I've found so far that are decent are duralast ones.
After doing the brakes remember to give the pedal a handful of full pumps to get it stiff before you drive. Preferably with the vehicle off still. Back up/down the driveway and use the brakes once its ready to drive and back together. Then calibrate the brakes:
-Cars on and in park
-Turn traction control off
-Press the pedal down all the way for 30 secs
-Give it a few light pumps.
Done
-Remember to not torque your control arm bushings in the air. I just got them on with a crescent wrench and 3/8 ratchet. Then when on the ground used my 1/2 inch torque wrench to get them to spec.
-Remember to get an alignment afterwards. Cost me 160 dollars at Nissan
RESULTS:
-Im still waiting on a new axle nut but I put the old one on at 100 ft-lbs. Greased the splines. Little to no axle click now. I've only driven it twice so far and my brains used to drowning out the click, so its hard to tell yet but it seems gone or mostly gone. Ill update on what it does with the new nuts at 110 ft-lbs.
-Car is VERY stable. I actually cant believe how little new struts/rear shocks did but new control arms and sway bar links made it feel solid and removed all the bounciness. I'd look at the control arms first before the shocks/struts.
-No noise on backing up/forward at very low speeds. No clunk at a slightly harder stop/accell.
REMAINING WORK:
Needs new swaybar bushings. But the only symptom of this is extra noise on holes and, maybe, noise in winter.
Phew. Hopefully one of my tires doesnt fall off within the next week and I dont need to touch the car for another 100K+ miles. Besides maybe the battery
PARTS from rock auto:
https://www.rockauto.com/en/moreinfo.php?pk=6260928&cc=3435389&pt=1636
https://www.rockauto.com/en/moreinfo.php?pk=15758541&cc=3435389&pt=10281
https://www.rockauto.com/en/moreinfo.php?pk=16670725&cc=3435389&pt=1896
https://www.rockauto.com/en/moreinfo.php?pk=11674989&cc=3435389&pt=15174
https://www.rockauto.com/en/moreinfo.php?pk=11674993&cc=3435389&pt=15174
https://www.rockauto.com/en/moreinfo.php?pk=6361152&cc=3435389&pt=1684
https://www.rockauto.com/en/moreinfo.php?pk=8093136&cc=3435389&pt=10401
https://www.rockauto.com/en/moreinfo.php?pk=8092660&cc=3435389&pt=10401
https://www.rockauto.com/en/moreinfo.php?pk=8629932&cc=3435389&pt=2288
https://www.rockauto.com/en/moreinfo.php?pk=11179313&cc=3435389&pt=2288
https://www.rockauto.com/en/moreinfo.php?pk=12491897&cc=3435389&pt=7496
https://www.rockauto.com/en/moreinfo.php?pk=12491901&cc=3435389&pt=7496
https://www.rockauto.com/en/moreinfo.php?pk=4760409&cc=3435389&pt=7428
https://www.rockauto.com/en/moreinfo.php?pk=4760811&cc=3435389&pt=7428
https://www.rockauto.com/en/moreinfo.php?pk=5627706&cc=3435389&pt=7580