Collapsed Lifter?

Posted By: GwaiiEagle

Collapsed Lifter? - 05/06/10 09:24 PM

I swapped in the summit cam. Broke it in. Drove it around. Quite a bit of bottom end over the .484.

The next day the ticking started, followed soon after by a knocking or popping sound.

Is this a collapsed lifter?

Youtube vid attached.
Video of engine running.

Posted By: Challenger 1

Re: Collapsed Lifter? - 05/06/10 09:37 PM

bummer, I'm thinking the worse.

Cut your oil filter apart.

Posted By: GwaiiEagle

Re: Collapsed Lifter? - 05/06/10 09:50 PM

Looking for some hunk of metal?

If you bring the revs up slowly there is a ticking but no popping. Want a vid of that?

Posted By: buildanother

Re: Collapsed Lifter? - 05/06/10 10:11 PM

Not good. If the popping is new, it might have wiped a lobe. A totally collapsed lifter would still give enough lift to not pop with the light throttle you gave it. Time to pull covers, I imagine.

Maybe a pushrod fell out, if you're lucky.

Posted By: groundpoint6

Re: Collapsed Lifter? - 05/06/10 10:23 PM

Sounds like a push rod popped out

Posted By: GwaiiEagle

Re: Collapsed Lifter? - 05/06/10 10:24 PM

I pulled the valve covers all the rockers seem tigh and intact except for one which feels very spongy.

Am going to pull intake.

With the intake out it is clear one of the lifters isn't like the others. You can press the pushrod down by hand and remove it.

Posted By: groundpoint6

Re: Collapsed Lifter? - 05/06/10 10:50 PM

Then that one spongy rocker sounds like a bad lifter

Posted By: GwaiiEagle

Re: Collapsed Lifter? - 05/06/10 11:01 PM

Here is vid of the lifter and me tugging on it. Lifter tugging

And of the lobe, too!

Posted By: groundpoint6

Re: Collapsed Lifter? - 05/06/10 11:53 PM

Why is that lifter sitting crooked in its boss

Posted By: GwaiiEagle

Re: Collapsed Lifter? - 05/07/10 12:00 AM

Why does this happen?

Posted By: Challenger 1

Re: Collapsed Lifter? - 05/07/10 12:08 AM

Sorry, cam and lifter failure. Why? Oil, too much spring pressure, wrong breakin procedure, bad cam core, poor material used for the lifters, wrong lash adjustment are just some that come to mind.

Need to pull the whole motor apart and inspect and clean everything expecially the oil gallerys.

Sorry again.

Posted By: GwaiiEagle

Re: Collapsed Lifter? - 05/07/10 12:24 AM

The bummer is the motor can come out and I have a another to put in but the other needs lifters for a solid. No way to get them here except by air for the start of the week.

I take the Ferry next Thursday to the drags.

Looks like I am taking the p/u.

Posted By: Cudajon

Re: Collapsed Lifter? - 05/07/10 12:42 AM

Thats a heartbreak. I'm not going to build an engine with flat tappets again. They're all going to be roller - hydraulic or solid. This story is becoming too common for me. Once you buy a second cam and lifters, pull the engine apart and clean it I'm guessing the extra cost of the rollers might break even. Soryy dude thats too bad.

Posted By: TJP

Re: Collapsed Lifter? - 05/07/10 01:15 AM

Quote:

Why is that lifter sitting crooked in its boss

Good Question????

Somethings not right there and a crooked lifter bore, hard to imagine, would wipe a cam in a nanosecond

Posted By: Snoopy

Re: Collapsed Lifter? - 05/07/10 02:12 AM

Quote:

Quote:

Why is that lifter sitting crooked in its boss

Good Question????

Somethings not right there and a crooked lifter bore, hard to imagine, would wipe a cam in a nanosecond

Have you seen any lifters that were worn on that angle. I have seen them badly cupped, but not like the one he shows. I would check the diameter of the lifter bore and the diameter of the affected lifter. I think this is more than just a typical flattened cam.

I am assuming this wasn't a virgin block.

Posted By: GwaiiEagle

Re: Collapsed Lifter? - 05/07/10 08:44 AM

No, I think it is the first build on a 77 block because it is only .020 over.

The valve train is non adjustable for this setup.

The .484 cam that was in there did not have this trouble.

The other lifters showed signs of wear, but this was the only one that looked like that.

Thanx for the help, though. The cam did make good power. I'll break it apart and see how the rest held up. Those metal shavings had to go somewhere.

Posted By: Scott Carl

Re: Collapsed Lifter? - 05/07/10 02:24 PM

Quote:

I swapped in the summit cam. Broke it in. Drove it around. Quite a bit of bottom end over the .484.

The next day the ticking started.....

I know this will seem like a silly question, but they were new lifters with the new cam right? The OP only mentioned a new cam. I assumed new lifters as well.

Posted By: stumpy

Re: Collapsed Lifter? - 05/07/10 03:17 PM

Like Snoopy said , that looks like the lifters aren't the right size for the bore. The lifters should be snug and have no side to side movement. It looks like both the lifters in that piture are cocked.

Posted By: Challenger 1

Re: Collapsed Lifter? - 05/07/10 04:34 PM

Quote:

Like Snoopy said , that looks like the lifters aren't the right size for the bore. The lifters should be snug and have no side to side movement. It looks like both the lifters in that piture are cocked.

I think it's a optical illusion, no one would put lifters in loose. Now once the lifter started to wear, then I could see it getting outta wack.

The engine would not last 10 mins if the lifters were loose in there bores.

Posted By: buildanother

Re: Collapsed Lifter? - 05/07/10 04:51 PM

And they would never hold pressure, and would be ticking up a storm from the start.

Posted By: GwaiiEagle

Re: Collapsed Lifter? - 05/07/10 05:37 PM

They were Summit's K6401 cam and lifter kit new.

Posted By: Snoopy

Re: Collapsed Lifter? - 05/07/10 09:22 PM

The factory offered .030" oversize lifters. Make sure you measure the lifter bores and the lifter diameters.

Posted By: 66cornet

Re: Collapsed Lifter? - 05/08/10 12:17 AM

Quote:

.

Those metal shavings had to go somewhere.

I just went through the same type of thing with a MP 509 cam and lifters. #8 intake lifter stuck and wiped the cam lobe.

When I dropped oil pan it looked like metal flake paint in there. I had to do a complete teardown, wash and rinse. I put all new main and rod bearings in, got new cam etc, almost together. Maybe fire tomorrow or sunday....Good luck on your motor.

Posted By: Snoopy

Re: Collapsed Lifter? - 05/08/10 01:00 AM

Quote:

Quote:

.

Those metal shavings had to go somewhere.

I just went through the same type of thing with a MP 509 cam and lifters. #8 intake lifter stuck and wiped the cam lobe.

When I dropped oil pan it looked like metal flake paint in there. I had to do a complete teardown, wash and rinse. I put all new main and rod bearings in, got new cam etc, almost together. Maybe fire tomorrow or sunday....Good luck on your motor.

What replacement lifters did you buy?

Posted By: 66cornet

Re: Collapsed Lifter? - 05/09/10 09:10 PM

Quote:

Quote:

Quote:

.

What replacement lifters did you buy?

I decided to go with a completely new cam. Bought the Lunati VooDoo cam and lifter kit #60304.

Hopefully everything will go ok this time. If not I'm going roller.