Valvetrain Noise after Cam and Lifter Replacement

[Burla]

I think you read that wrong Mike,it says to let the engine sit for 5 minutes to let the lifters bleed down,before cranking it.

got that, but what I didnt get was why. Is it a measurement thing? Are they worried about pumped up lifters causing fluid friction? Without the why it is gobbly ****. Why would the lifters need to be bleeding down assuming the engine had already done that if it was worked on this was putting it back together? any ideas why they even said that?

Why I'm curious is anything we can get from manu to follow crumbs that may explain why push rods leaving cup.

 

[Burla]

Do not "pump up" hydraulic lifters before installation, as this can cause them to hold a valve open during cranking, leading to low compression and potential damage during break-in

But my question is why would they even worry about this if you were putting the engine back together, lifters already empty of fluid?

 

[Wild one]

Do not "pump up" hydraulic lifters before installation, as this can cause them to hold a valve open during cranking, leading to low compression and potential damage during break-in

But my question is why would they even worry about this if you were putting the engine back together, lifters already empty of fluid?

Basically they're covering their &sses,but it's always a good idea to turn the engine over by hand before trying to start it. Usually it should be done before it's all back together,that way if things do hit,you can easily check the cam timing if you do it before bolting the timing cover back on.Ma Mopar reconmends not soaking the lifters,but i'd rather soak them,and then turn the engine over by hand,that way they'll bleed off ,and you won't hurt anything.I'm not a huge fan of installing the lifters with out pre-soaking them,as they'll rattle like hell till they get some oil in them.The valve springs will bleed them down,if you turn the engine over by hand,it's the guys who throw it all back together,with out hand rotating the engine first,then hit the key to start it,that have issues

 

[wolfgang2001]

Taking the truck on a 200 mile trip on a prayer that they just need breaking in. Wish me luck.

 

[wolfgang2001]

Made it halfway, noise is still present, oil pressure has been good, no loss of power through RPM band, no new codes present. Averaged a speed between 65-75 MPH.

Basically no issues to list other than the noise and those existing codes. Im still at a loss at what this could possibly be.

 

[Burla]

Made it halfway, noise is still present, oil pressure has been good, no loss of power through RPM band, no new codes present. Averaged a speed between 65-75 MPH.

Basically no issues to list other than the noise and those existing codes. Im still at a loss at what this could possibly be.

Are you sure it is only one side? Get a stethoscope on both valve cover areas and see what you have. If passenger side reveals more over drivers, gotta see what you have there, check pushrods?

 

[wolfgang2001]

Are you sure it is only one side? Get a stethoscope on both valve cover areas and see what you have. If passenger side reveals more over drivers, gotta see what you have there, check pushrods?

I’m pretty certain that it is only on the passenger side, but obviously without using a stethoscope it’s hard to tell. I pulled the pushrods again last night and all them were still perfectly straight.

 

[wolfgang2001]

New symptom, very slight shudder at idle. Idle rpm is around 550-575.

 

[wolfgang2001]

Are you sure it is only one side? Get a stethoscope on both valve cover areas and see what you have. If passenger side reveals more over drivers, gotta see what you have there, check pushrods?

Just ran the stethoscope over everything, my conclusion is it is coming from cylinder #2 intake rocker/pushrod. Nothing on driver side. No clue why or anything. Gonna pull the valve cover either tonight when the truck cools off or tomorrow.

 

[Burla]

Yeah, stethoscopes sometimes best tool.

 

[wolfgang2001]

So something new to add to my suspicion of cylinder #2, I now have a cylinder #2 misfire!

 

[Wild one]

So something new to add to my suspicion of cylinder #2, I now have a cylinder #2 misfire!

Did you use OEM lifters or cheap aftermarket lifters,as it sounds like you've got a bad lifter,which is very common with after market lifters.Time to take it back apart,and see what went wrong

 

[wolfgang2001]

Did you use OEM lifters or cheap aftermarket lifters,as it sounds like you've got a bad lifter,which is very common with after market lifters.Time to take it back apart,and see what went wrong

I used all OEM parts with the exception of all the gaskets, plugs, and coils. I haven’t entirely ruled out that it could be a defective lifter. Just praying that it isn’t.

 

[Wild one]

I used all OEM parts with the exception of all the gaskets, plugs, and coils. I haven’t entirely ruled out that it could be a defective lifter. Just praying that it isn’t.

Do a compression test before your tear into it,but it sounds like you've got a bad lifter.
You didn't happen to buy OEM lifters off Ebay did you?

 

[Burla]

Solve this and I bet your good to go. It is likely a moving part in that chain from valve to lifter. I don't think if it was a fuel, air, or spark issue you would get that noise as the first symptom. IMO it's a hard part out of whack, and you probably shouldn't drive it.

 

[wolfgang2001]

Do a compression test before your tear into it,but it sounds like you've got a bad lifter.
You didn't happen to buy OEM lifters off Ebay did you?

Will do and no I got them from my local dealer.

 

[wolfgang2001]

Solve this and I bet you’re good to go. It is likely a moving part in that chain from valve to lifter. I don't think if it was a fuel, air, or spark issue you would get that noise as the first symptom. IMO it's a hard part out of whack, and you probably shouldn't drive it.

Agreed, not driving it anymore until I figure this out. Gonna tear it back apart and see what I can figure out. Will keep this thread updated.

 

[wolfgang2001]

So pulled the rocker arm shaft today and inspected those retainer clips that are referenced in the star case and these are my findings. I don’t really know how it is going to post but the first image is front with the last image being the rear bolt.

 

[wolfgang2001]

I may be wrong but the oiling comes up through the threads through the rocker arm shaft to oil the valve springs and lifters. If passage is blocked then this could be causing the poor lubrication of everything and in turn the noise I am hearing.

 

[wolfgang2001]

Same story on the exhaust rocker arm shaft.