Cam pitting. Is this one usable?
Cam pitting. Is this one usable? This is on an MS4 pulled out of my car that was in it when I bought it. Is this cam shot?
This is the only lobe with any visible wear. The rest are fine.
This is the only lobe with any visible wear. The rest are fine.
TECH Resident
Joined: Apr 2014
Posts: 985
Likes: 12
I don't think you will find anybody that would use that cam.
Think about it, you have 2 smooth surfaces that will be pushed together, rotating,
if one of those surfaces have a rough spot on it what will it do to the other surface?
It most likely could make the other surface the same way, and that would create
ground up metal running through your oil system, around the bearings.
I would check the bearings to see if they are bad as well. thats just my .02
good luck
Think about it, you have 2 smooth surfaces that will be pushed together, rotating,
if one of those surfaces have a rough spot on it what will it do to the other surface?
It most likely could make the other surface the same way, and that would create
ground up metal running through your oil system, around the bearings.
I would check the bearings to see if they are bad as well. thats just my .02
good luck
On The Tree
Joined: Jun 2012
Posts: 122
Likes: 2
i reused a cam with a lobe messed up in my 5.3 build, but not as messed up as yours, though i reused the hotcam here in this video in my 5.3 rebuild just to see what would happen, i dont think a high ramp rate cam with a lobe like this would be ok to reuse at all.. but stock or close to stock ramp rate, i think it would be fine for at lest 20,000 miles, being that's how long mine lasted even with a bunged up lifter roller.. I used emery cloth and diesel to smooth out the lobe before reinstalling ...
So if ya dont have much money at the time and dont care that your going to have to take it back out and rebuild again soon.. sure reuse it
If i had your cam id reuse it just to see what would happen
Here is the sound it makes, as i can only guess, the sound your lobe was making was really close to this sound here..
Make sure to subscribe to see the outcome of this junkyard 5.3
peace
So if ya dont have much money at the time and dont care that your going to have to take it back out and rebuild again soon.. sure reuse it
If i had your cam id reuse it
just to see what would happen Here is the sound it makes, as i can only guess, the sound your lobe was making was really close to this sound here..
Make sure to subscribe to see the outcome of this junkyard 5.3
peace Last edited by the404man; Feb 21, 2016 at 12:04 AM.
This cam is not useable. Send me a pm with a shot of the back just to verify its an MS4. I can tell by the picture this is a comp grind. This is a great example of why we took cam grinding in house.
If the cam is indeed an MS4, even though was ground by comp, and you're the second owner, I will take 100 off a replacement camshaft that is our in house grind. This way you never have to worry about the quality
Dominic
If the cam is indeed an MS4, even though was ground by comp, and you're the second owner, I will take 100 off a replacement camshaft that is our in house grind. This way you never have to worry about the quality
Dominic
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This cam is not useable. Send me a pm with a shot of the back just to verify its an MS4. I can tell by the picture this is a comp grind. This is a great example of why we took cam grinding in house.
If the cam is indeed an MS4, even though was ground by comp, and you're the second owner, I will take 100 off a replacement camshaft that is our in house grind. This way you never have to worry about the quality
Dominic
If the cam is indeed an MS4, even though was ground by comp, and you're the second owner, I will take 100 off a replacement camshaft that is our in house grind. This way you never have to worry about the quality
Dominic
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Teching In
Joined: Jan 2016
Posts: 10
Likes: 0
Replace it. Had a friends LS2 completely destroyed when pitting on the cam sent debris to the oil pump that held the relief open and starved the motor.
The cam, main and rod bearings were toast, cam lobes and lifters were ground bare. There was even damage to the lifter bores due to debris.
I would take Texas-Speed up on their offer.
The cam, main and rod bearings were toast, cam lobes and lifters were ground bare. There was even damage to the lifter bores due to debris.
I would take Texas-Speed up on their offer.
