what could have caused this? wiped lobe and litfer
#1194293
03/10/12 01:50 AM
03/10/12 01:50 AM
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Joined: Jan 2010
Posts: 1,944
woodcrest, CA
magnum440d100
OP
top fuel
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OP
top fuel
Joined: Jan 2010
Posts: 1,944
woodcrest, CA
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this is the ONLY lifter with this damage...the others are worn, but still shiney and flat...  this is the cam from the 318...notice the second lobe is GONE  its actually almost perfectly ROUND   And amazingly, she still ran good...not great, but good...in an attemp to get this 318 going for another few weeks, I went ahead and threw the 360 cam and lifters in there. HOPEFULLY it lasts a couple more months until I can get the 360 back together.. So my questions is...WHAT caused this?? Lack of lubrication, a weak valve spring, faulty (probably original) lifter?? I KNOW there might be metal particles in the oil. I flushed as much as I could, and luckily there wasn't much on the oil plug magnet. Hopefully she runs great monday on my way to work...yesterday sh didn't want to run hardly and I had to take today off...I can't WAIT for monday 
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Re: what could have caused this? wiped lobe and litfer
[Re: magnum440d100]
#1194294
03/10/12 06:04 AM
03/10/12 06:04 AM
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Joined: Aug 2003
Posts: 12,291
Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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IMO thats not a "WIPED" cam or lifter. That is deterioration of the hardened surface . A "WIPED" cam or lifet is where the lobe or bottom of the lifter is worn to where the surfaces have ground against each other to the point that they are gone...
I am truckless..
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Re: what could have caused this? wiped lobe and litfer
[Re: 340SHORTY]
#1194295
03/10/12 09:30 AM
03/10/12 09:30 AM
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Joined: Jan 2003
Posts: 21,072
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,072
Niles , Ohio
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My kids 83 Ram had 3 lobes that were worn good.One was almost gone.It ran decent but never great.It had 180K on the motor.It was clean inside also.I stuffed another sb in it and fixed that.Rocky
Chrysler Firepower
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Re: what could have caused this? wiped lobe and litfer
[Re: terzmo]
#1194297
03/10/12 01:24 PM
03/10/12 01:24 PM
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Joined: Jan 2010
Posts: 1,944
woodcrest, CA
magnum440d100
OP
top fuel
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OP
top fuel
Joined: Jan 2010
Posts: 1,944
woodcrest, CA
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Quote:
flat tappett cams/lifters wear like crazy unless high zinc oil is used. I had that on My 440..#6 wore badly that the pushrod came out..only had about 15k on the motor...also some cams are poor selections
I would be surprised if this motor has 30k on the cruddy rebuild done. It is a stock 318 cam. I'm wondering if when they rebuilt it, if the didn't put the lifters back in the same spot.
On a brighter note, she runs AWESOME now. I must have picked up 100 horse  lol. It has some pick up now 
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Re: what could have caused this? wiped lobe and litfer
[Re: magnum440d100]
#1194298
03/10/12 01:31 PM
03/10/12 01:31 PM
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Joined: Jan 2003
Posts: 75,005
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,005
U.S.S.A.
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Quote:
I KNOW there might be metal particles in the oil. I flushed as much as I could, and luckily there wasn't much on the oil plug magnet.
there MIGHT be ?? 
The reason there wasn't alot on the magnet is because it was recycled back into the engine , your oil pump is scored badly , you're lucky it didn't lock up and break it's drive shaft , the pistons below that one got the meatl on it and it's imbedded in the skirt and scored up the walls ...
Just run it till it 
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Re: what could have caused this? wiped lobe and litfer
[Re: JohnRR]
#1194299
03/10/12 02:01 PM
03/10/12 02:01 PM
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Joined: Nov 2007
Posts: 21,822
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,822
Kirkland, Washington
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Quote:
Quote:
I KNOW there might be metal particles in the oil. I flushed as much as I could, and luckily there wasn't much on the oil plug magnet.
there MIGHT be ??
The reason there wasn't alot on the magnet is because it was recycled back into the engine , your oil pump is scored badly , you're lucky it didn't lock up and break it's drive shaft , the pistons below that one got the meatl on it and it's imbedded in the skirt and scored up the walls ...
Just run it till it
Don't be so quick with the death sentence. He's lucky, lucky because the wear is so smooth. The resulting particles have got to be very small--extremely small in fact--otherwise the wear would have been coarse.
This is a case where the particles may have done very little damage, and ended up as a paste in the oil filter.
I would definately cut open the filter out of curiosity.
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Re: what could have caused this? wiped lobe and litfer
[Re: Pacnorthcuda]
#1194300
03/10/12 02:19 PM
03/10/12 02:19 PM
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Joined: Apr 2003
Posts: 12,234
Looking for a way out of Middl...
IMGTX
I Live Here
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I Live Here
Joined: Apr 2003
Posts: 12,234
Looking for a way out of Middl...
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Quote:
This is a case where the particles may have done very little damage, and ended up as a paste in the oil filter.
I would definately cut open the filter out of curiosity.
I agree. I had a cam wipe a lobe on my 318 many years ago.
Swapped cams, Changed oil and 150K later it's still going strong.
Good Luck 
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Re: what could have caused this? wiped lobe and litfer
[Re: Pacnorthcuda]
#1194301
03/10/12 10:32 PM
03/10/12 10:32 PM
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Joined: Jan 2010
Posts: 1,944
woodcrest, CA
magnum440d100
OP
top fuel
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OP
top fuel
Joined: Jan 2010
Posts: 1,944
woodcrest, CA
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Quote:
Quote:
Quote:
I KNOW there might be metal particles in the oil. I flushed as much as I could, and luckily there wasn't much on the oil plug magnet.
there MIGHT be ??
The reason there wasn't alot on the magnet is because it was recycled back into the engine , your oil pump is scored badly , you're lucky it didn't lock up and break it's drive shaft , the pistons below that one got the meatl on it and it's imbedded in the skirt and scored up the walls ...
Just run it till it
Don't be so quick with the death sentence. He's lucky, lucky because the wear is so smooth. The resulting particles have got to be very small--extremely small in fact--otherwise the wear would have been coarse.
This is a case where the particles may have done very little damage, and ended up as a paste in the oil filter.
I would definately cut open the filter out of curiosity.
That filter is LONG gone. The filter I took off yesterday had maybe 300 miles on it. I already dumped the oil into the pan, but just may cut it open out of curiosity.
Yeah I wouldn't call it dead quite yet. It reuns AWESOME and if I didn't have to re wire today, I would have fixed the seeping valve cover gasket.
Oh and oil pressure is 75 cold, 40 hot idle. She idles smooth and besides the hesitation, has a LOT more power. I even switched to electronic ignition. More on that later 
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Re: what could have caused this? wiped lobe and litfer
[Re: dogdays]
#1194304
03/12/12 12:16 AM
03/12/12 12:16 AM
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Joined: Oct 2003
Posts: 3,688
Alexandria,La.
BigTerry
master
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master
Joined: Oct 2003
Posts: 3,688
Alexandria,La.
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Quote:
My first used car was a 68 chevelle that no matter what we did we couldn't get the 307 to run right. Pulled it to put in a different motor and found three round cam lobes. This was in 1975 or so, no talk about zinc in the oil back in the day.....
The crank wasn't bad, it was just like every other 100K engine from that time span. I still have most of that engine. I guess I'm waiting for the end of time or something. Anyhow, it will probably run OK for you. Sometimes the lobes wear enough to go through the hardened surface and then they wear like what you have pictured.
The 360 cam is a nice upgrade from a stock 318 cam with its 0.373 intake lift.
R.
I had a 70 chevelle station wagon with a 307 I don't remember how many miles it had, I would go to the gas station and the attendant would ask what I need I tell to fill the oil and check the gas hehehe well me and the ex went into town had to stop and put oil in crank the car up and it was running like crap. we made it to mom and dad house went out pulled the vc off and crank the car... ever other rocker would move the other just barely move we drove it home and I pulled the motor..
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