6.4 rockers wore severely.

kyle43335 · Jun 16, 2012

i have a 2008 here with 126,000 miles,that threw no.7 intake rocker.

i pulled all the rockers on that side,and all the ball ends that ride on the bridges are wore severely. like almost flush with the face of the tip retainer.

you can grab the tip and pull them right out of the rocker pocket.

how many cases might there be?

anyone seen this,this bad? i will be pulling the other side apart later as well.

truck had a cont/balance fault code for no.2 and 7.

also a no.7 miss fire code.

Petro · Jun 16, 2012

Hope that doesnt become a common 6.4L problem.

Derek@Vision Diesel · Jun 16, 2012

Seems as though it is pretty common, the rocker arms off the 6.0s are a very good upgrade IMO

kyle43335 · Jun 16, 2012

Derek@Vision Diesel said:
Seems as though it is pretty common, the rocker arms off the 6.0s are a very good upgrade IMO

im looking at them as well. the only difference between the two are,they're is not any oil holes in the rocker.

the concept of how the 6.4 rocker recieves oil in the tip is stuipd. it spews out the pushrod hole,runs down the top edge of the rocker,and in the tip feed hole.

the 6.0 doesnt have any of those oil hole,so i can't wrap my head around how that tip(on the 6l) recieves any lube.

however i haven't seen issues like this on the 6.0. a broken rocker here and there. sure but no wear like this.

the pushrods are even wore at the rocker end(on the ball).

Derek@Vision Diesel · Jun 16, 2012

Stupid design for sure, the minute my valve covers come off I am going to replace the rockers with factory ones or 6.0 ones. Too many stories of this happening

Dieselcraft · Jun 16, 2012

See it every 6.4 with over 60k miles

redx · Jun 16, 2012

isnt the whole rocker assy $120 or so?

MorganY · Jun 16, 2012

I've seen it too. pretty common

umbrae · Jun 18, 2012

Happened to me. Except when it broke it took down a couple of pushrods, I thought it had grenaded.

madman1234509 · Jun 18, 2012

102k and no problems like this here. Just had heads off 6k ago

kyle43335 · Jun 19, 2012

just got the rockers from ford this morning. i ordered them for a 6.0.

other than the bases,they're the same rocker commonized for service parts.

i think everyone that has run into this issue with the 6.4,should post up what oil they're using.

i think maybe the 6.0 guys not having this issue,is due to the quality of oil we use for good injector life??

thoughts?

Nic · Jun 19, 2012

seems to me if the ones on a 6.4 are ported for oil then a lubrication wear situation shouldnt occur. what oil do you use and how far do you stretch changes?

Ive heard that the oil on a 6.4 should be changed about every 3500 miles because of the stock regen mode and all the heat and stress it creates. Now if it was driven like this for lets say 50k stock before it was tuned and oil changes at every 5-6k, could this cause the pre mature wear of these and the associated parts? Ive heard of a couple of 6.4s having similar issues and spinning cam lobes? They run the hell out of them and dont change the oil for about 7-8k on CONVENTIONAL oil..cant be good.

kyle43335 · Jun 19, 2012

Nic said:
seems to me if the ones on a 6.4 are ported for oil then a lubrication wear situation shouldnt occur. what oil do you use and how far do you stretch changes?

Ive heard that the oil on a 6.4 should be changed about every 3500 miles because of the stock regen mode and all the heat and stress it creates. Now if it was driven like this for lets say 50k stock before it was tuned and oil changes at every 5-6k, could this cause the pre mature wear of these and the associated parts? Ive heard of a couple of 6.4s having similar issues and spinning cam lobes? They run the hell out of them and dont change the oil for about 7-8k on CONVENTIONAL oil..cant be good.

its a customers truck. i will ask him what oil he uses,and how long he runs it. this truck is deleted and tuned. i dont know for how long though.

04stroker · Jun 19, 2012

I see a lot of 6.4 rocker issues. Most are using rotella oil at 5k interval. I try to talk them out of rotella but they are all stuck on it.

drunk on diesel · Jun 19, 2012

I think excessive idle is a big contributor. Lower oil pressure at idle? That and a lot of regens. Seems to be more exhaust rockers than intake. Due to heat during regen possibly?

HD F250 · Jun 19, 2012

Guess I can expect to add this to build list. The list just keeps growing, but I might as well do them while the cab is off and studs and drivetrain are going in.

Thanks, for the heads up!

kyle43335 · Jun 19, 2012

i just fired this thing up about twenty minutes ago. cleared adaptives,and codes.

theres a audible chip-ticking-knocking noise coming and going from no 7.

sounds and feels like a valve guide,because im feeling around while its running,and i feel it resignating through the valve spring,when it starts making the noise.

looks like this is turning into a cab off exploration.

SEABEE08FX4 · Jun 19, 2012

Hmmm I got 182K on mine with no issues.

ColtonP · Jun 19, 2012

Dad has 130K on his 08 and needs to replace his. The stealership is telling him that they have to pull the cab. How hard is it if you do it with the cab on?