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Collapsed Lifter?
#690509
05/06/10 05:24 PM
05/06/10 05:24 PM
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Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
GwaiiEagle
OP
Mannix
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OP
Mannix
Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
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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.
Last edited by GwaiiEagle; 05/06/10 05:25 PM.
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Re: Collapsed Lifter?
[Re: Challenger 1]
#690511
05/06/10 05:50 PM
05/06/10 05:50 PM
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Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
GwaiiEagle
OP
Mannix
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OP
Mannix
Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
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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?
Last edited by GwaiiEagle; 05/06/10 05:52 PM.
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Re: Collapsed Lifter?
[Re: groundpoint6]
#690514
05/06/10 06:24 PM
05/06/10 06:24 PM
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Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
GwaiiEagle
OP
Mannix
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OP
Mannix
Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
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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.
Last edited by GwaiiEagle; 05/06/10 06:53 PM.
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Re: Collapsed Lifter?
[Re: GwaiiEagle]
#690519
05/06/10 08:08 PM
05/06/10 08:08 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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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.
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Re: Collapsed Lifter?
[Re: groundpoint6]
#690522
05/06/10 09:15 PM
05/06/10 09:15 PM
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Joined: Jan 2003
Posts: 15,383
Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,383
Omaha Ne
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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
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Re: Collapsed Lifter?
[Re: TJP]
#690523
05/06/10 10:12 PM
05/06/10 10:12 PM
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Joined: Mar 2003
Posts: 8,850
Central Coast, Calif.
Snoopy
master
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master
Joined: Mar 2003
Posts: 8,850
Central Coast, Calif.
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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.
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Re: Collapsed Lifter?
[Re: Snoopy]
#690524
05/07/10 04:44 AM
05/07/10 04:44 AM
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Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
GwaiiEagle
OP
Mannix
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OP
Mannix
Joined: Feb 2004
Posts: 964
Nanaimo, B.C.
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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.
Last edited by GwaiiEagle; 05/07/10 04:45 AM.
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Re: Collapsed Lifter?
[Re: GwaiiEagle]
#690525
05/07/10 10:24 AM
05/07/10 10:24 AM
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Joined: Aug 2008
Posts: 1,568
Omaha, Nebraska
Scott Carl
pro stock
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pro stock
Joined: Aug 2008
Posts: 1,568
Omaha, Nebraska
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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. 
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Re: Collapsed Lifter?
[Re: stumpy]
#690527
05/07/10 12:34 PM
05/07/10 12:34 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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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.
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