Erikclaw
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The diagnostic work? Eric Brown at Brown's.
Update on my rig
- Thread starter Erikclaw
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The diagnostic work? Eric Brown at Brown's.
Erikclaw
Active member
It is either rocker arm pedestal height or push rods on one side are too long. smh tired of this chit
lincolnlocker
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Bustedknuckles
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Heads or block decked too much.
lincolnlocker
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lincolnlocker
Well-known member
so possible coil bind now?
live life full throttle
live life full throttle
Six_Sloww
New member
And the possibility of valves not closing all the way, hence not running on all cyl's
Morgan@Midwest Diesel & Auto
New member
A few months ago ford/navistar had a run of rocker arms that the pedestals were machined wrong. We are hoping that's what it is. Have had another customer have this issue with a set he installed on one of his customers trucks. He thought it was because the heads were decked too far. But in reality when he pulled it apart he measured the pedestal and found they were not right. This was since Erik's engine had already been built. There is a good possibility that this could be the cause. On the engine stand all the valve train and rockers were fine when doing the rollover. None were tight. But as with the others we've heard about, once it starts and pumps a little oil pressure into the lifters, it seems to hold the valves open just a hair.
The block is brand new, not decked. The heads were new. They were within spec. The pushrods are the same 9.800" used on every 6.4 made. The lifters, well I have no idea as I have never used the ones Erik supplied for the build.
We are talking small amounts, a long ways from coil bind. It would have to be a half inch off the even come close....
It sucks, but on the engine stand there is nothing we could have done different. If it was the incorrect rocker pedestal machining that caused it, we didn't know there was even a problem to check for. This has just surfaced in the last month or so. It coincides with ford being back ordered on rocker assemblies for month earlier this year.
Either way, it sucks, but not the end of the world. I've been helping Browns with the trouble shooting and they are headed in the right direction.
This is certainly not the first 6.4 or 6.0 that has had an issue like this that I've heard of. Between milled heads, blocks, 6.0 pushrods used in 6.4's etc.... I've had a lot of people tell me stories like this. That's why we have shorter pushrods for these occasions.
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The block is brand new, not decked. The heads were new. They were within spec. The pushrods are the same 9.800" used on every 6.4 made. The lifters, well I have no idea as I have never used the ones Erik supplied for the build.
We are talking small amounts, a long ways from coil bind. It would have to be a half inch off the even come close....
It sucks, but on the engine stand there is nothing we could have done different. If it was the incorrect rocker pedestal machining that caused it, we didn't know there was even a problem to check for. This has just surfaced in the last month or so. It coincides with ford being back ordered on rocker assemblies for month earlier this year.
Either way, it sucks, but not the end of the world. I've been helping Browns with the trouble shooting and they are headed in the right direction.
This is certainly not the first 6.4 or 6.0 that has had an issue like this that I've heard of. Between milled heads, blocks, 6.0 pushrods used in 6.4's etc.... I've had a lot of people tell me stories like this. That's why we have shorter pushrods for these occasions.
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Hammer Down
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We have seen this same issue with the rocker pedistal. I would think as particular as Morgan is if it was any other issue it would have been caught, like he said there isn't really a way to catch that on the stand. I'm hoping that's all it is and the rig will be up and running.
Luke@MillerPerformance
Member
Would you happen to have the spec on the pedestals? I've got a 6.4 here I'm about to drop the cab back on that I put new rock arms in. Had to special order them in because no one local had any.
Erikclaw
Active member
I hope that is it and more than likely is since others have shown up. Been on the road all day so don't know if that is the issue. Had Browns just get in contact directly since me being the middle man was getting annoying. Lol
Just talked to Brown's they are tearing it down to check the lot number on the pedestals to see if they are in the recall. If not then shorter pushrods are going in.
Just talked to Brown's they are tearing it down to check the lot number on the pedestals to see if they are in the recall. If not then shorter pushrods are going in.
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Morgan@Midwest Diesel & Auto
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Taken from a known good rocker arm. 40mm.
Over all these years we have been replacing rocker arms we never had any idea or inclination that there ever could have been an issue. And have had no reason to measure the pedestal. But ford has thrown us a knuckleball. And since I heard about the first one from a customer all the rocker stands are checked. Just so happens that was after Erik's engine had been built...
Just seems like anything that can happen will. I hope that is the issue. But shorter pushrods are no biggie.
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Taken from a known good rocker arm. 40mm.
Over all these years we have been replacing rocker arms we never had any idea or inclination that there ever could have been an issue. And have had no reason to measure the pedestal. But ford has thrown us a knuckleball. And since I heard about the first one from a customer all the rocker stands are checked. Just so happens that was after Erik's engine had been built...
Just seems like anything that can happen will. I hope that is the issue. But shorter pushrods are no biggie.
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yep , you're used to shorter rods.
Morgan@Midwest Diesel & Auto
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lincolnlocker
Well-known member
lmao!
nevermind... ill hold my tongue till my baby is back running...
live life full throttle
Morgan@Midwest Diesel & Auto
New member
Erikclaw
Active member
Yeah I heard the same, Morgan is used to dealing with mini rods.
Goes with my usual luck, mine went out just as these issues were beginning to surface.
opcorn::flipa:
Goes with my usual luck, mine went out just as these issues were beginning to surface.
opcorn::flipa:
Morgan@Midwest Diesel & Auto
New member
Rather mini rods that big man rods..... They hurt less.... Lololol that's what dillehay says anyway...
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Erikclaw
Active member
LOL, I hate it when you bent a rod, Damn It!
