Lifter bore issue - Need help!!!!

[excobraguy]

I've been chasing down my lifter noise around the #6 piston area in my new engine with the revolution x roller cam. I tore it down today (removed intake) and found that the #6 roller lifter on the intake goes about 7/8 of the way down and then catches on some burr or something in the lifter bore. If you push down hard on it it will push on through and then make contact with the cam lobe. Here's my question, will this eventually "wear" into a groove and then the noise stop or should I be concerned about it slapping the cam lobe. Can I just tighten down the rockers a little more past the 25 lbs or torque or leave them alone? I'm still on my breakin oil with 300 miles on the engine......I'm going to be running mobil 1 after the break-in period. I'm worried that the lifter is getting marred up on the side and may not ever slide in the lifter bore like it should. I also removed #4's roller lifters and they had the same issue in #6 intake, so it's a bore issue and not a lifter issue........any ideas????????

Here's a pic for what it's worth, the scuffing on the lifter is on the end.....

 

[86 TR]

The amount of spring pressure that is on the lifter should keep it on the cam lobe. I noticed on my engine when i went to install the roller lifters a couple didn't want to fully seat. But after a couple of revolutions every thing appeared to be ok.

BTW im running a weber 212-206 roller with harland sharp roller rockers and my car sounds like it has a solid roller in it. At first it concerned me how much louder it is, now I just learn to live with it. I have the correct length pushrods, valve springs, etc. sounds like a sewing machine.

Its alot louder than my flat tappet was.

I also had some scuffing on each of my lifters, being the worry wart I am I also took off my intake to check things out. The way I look at it is, with a flat tappet the lifter is rotating all of the time. With a roller just going the same direction.

As long as its not getting stuck in the bore I would assume it would be ok. I have approx. 500miles on my new engine and have beat it really hard already. Everything seems to be fine.

My new engine with the roller is staying steady for oil press. at 25psi idle hot with 10W-30 and 70psi WOT. Im constantly monitoring it to see for any changes.

 

[excobraguy]

The amount of spring pressure that is on the lifter should keep it on the cam lobe. I noticed on my engine when i went to install the roller lifters a couple didn't want to fully seat. But after a couple of revolutions every thing appeared to be ok.

BTW im running a weber 212-206 roller with harland sharp roller rockers and my car sounds like it has a solid roller in it. At first it concerned me how much louder it is, now I just learn to live with it. I have the correct length pushrods, valve springs, etc. sounds like a sewing machine.

Its alot louder than my flat tappet was.

I also had some scuffing on each of my lifters, being the worry wart I am I also took off my intake to check things out. The way I look at it is, with a flat tappet the lifter is rotating all of the time. With a roller just going the same direction.

As long as its not getting stuck in the bore I would assume it would be ok. I have approx. 500miles on my new engine and have beat it really hard already. Everything seems to be fine.

My new engine with the roller is staying steady for oil press. at 25psi idle hot with 10W-30 and 70psi WOT. Im constantly monitoring it to see for any changes.

Yeah, my oil pressure is right at 25 psi hot and 55 cruising at 60 mph. So it has good oil pressure. When you say yours sounded like a solid lifter cam do you mean you had a lot of lifter tapping noises? I could only hear this one at #6 and used an aluminum pipe stuck to my ear until I narrowed it down to #6.

 

[86 TR]

Yeah, it sounds like ticking noise. Its most pronounced at and idle and gets better when you rev it up.

I set the lifter preload at 1/2 turn preload, then 3/4 preload and the noise did not seem to quiet down.

I thought a roller cam should be quiet. Alot of people have told me most of the noise is from the link bars on the lifters themselves.

Is it possible that you have a bad lifter? Maybe. Ive heard of some roller lifters that were defective.
Are you getting good oiling to the top of the engine?

 

[excobraguy]

Yeah, it sounds like ticking noise. Its most pronounced at and idle and gets better when you rev it up.

I set the valves at 1/2 turn preload, then 3/4 preload and the noise did not seem to quiet down.

I thought a roller cam should be quiet. Alot of people have told me most of the noise is from the link bars on the lifters themselves.

Is it possible that you have a bad lifter? Maybe. Ive heard of some roller lifters that were defective.
Are you getting good oiling to the top of the engine?

Good oiling at the top, oh yeah....I took the valve cover off and it literally was squirting to the fender well! I was impressed. No, it's not a bad lifter.....I thinks it's hanging in the lifter bore....like yours my ticking, tapping whatever is pronounced at idle...........when I nail it it goes away. It's just an annoying noise and it is almost the same noise I had before my flat tappet cam went flat. That's what made me pull the intake today, I just had to see what was going on for myself.............I just wish the engine builder would have caught it before assembling the engine. He could have probably cleaned up the lifter bore and I would have no issues.......I've heard of guys having to wait a few thousand miles before their roller cams break in........I guess I can see why with an issue like mine........

 

[excobraguy]

Anyone else have any input on this?????

 

[gnxtc2]

And where is the metal going to go after it wears in? If it is hanging up, fix it. The lifter could also get burred and cause you to loss oil pressure.

Most likely when the oil gallery was drilled, it burred causing to catch the lifter. Stuff the lifter bore with oily paper and file gently to removed the burr.

Billy T.
gnxtc2@aol.com

 

[excobraguy]

And where is the metal going to go after it wears in? If it is hanging up, fix it. The lifter could also get burred and cause you to loss oil pressure.

Most likely when the oil gallery was drilled, it burred causing to catch the lifter. Stuff the lifter bore with oily paper and file gently to removed the burr.

Billy T.
gnxtc2@aol.com

Thanks for the input. How concerned should I be about the tailings from sanding off the burr?

 

[excobraguy]

Upon closer inspection I have sticking lifters!!!!!!!!!!! Some of them are extremely hard to push the plunger in while others push in easily.

 

[86 TR]

Upon closer inspection I have sticking lifters!!!!!!!!!!! Some of them are extremely hard to push the plunger in while others push in easily.

When a lifter is full of oil they are extremely hard if not impossible to push the plunger in by hand.

If the valve was open when you removed the lifter the oil probably has bled out some making it easy to move the plunger.

 

[excobraguy]

When a lifter is full of oil they are extremely hard if not impossible to push the plunger in by hand.

If the valve was open when you removed the lifter the oil probably has bled out some making it easy to move the plunger.

I hear what you are saying but the plunger coming back up is sticking on some....

 

[86 TR]

You could remove the snap ring and clean everything out real good. Be careful not to lose any parts though.

Maybe a couple of the lifters have some garbage in them. They seem to act like an oil filter. Once something gets in them it doesn't want to leave.

I would clean them up and see what they do then, because we all know roller lifters are not exactly cheap.

 

[NCTURBOS]

What brand and part# lifters? If they're Comp 853's, I've had many issues with them sticking. Never any issues with the 885's.


K.

 

[excobraguy]

What brand and part# lifters? If they're Comp 853's, I've had many issues with them sticking. Never any issues with the 885's.


K.

It's the ones with the Revolution X cam kit from Full Throttle, not sure what kind those are....they are comp cams though. Full Throttle agreed to exchange them, they had great customer service on the phone.......

 

["More Boost"]

wow! u got ahold of them? ashtonishing! i get a recording everytime i call,.............

 

[excobraguy]

wow! u got ahold of them? ashtonishing! i get a recording everytime i call,.............

I've never had a problem getting someone on the line.......??????

 

[turbofabricator]

The Comp retro-rollers are NOT serviceable. The rivet thet holds the tie-bar on prevents the removal of the piston/plunger.