Re: lost cam lobe on break in twice
[Re: rusthole]
#299211
04/25/09 07:52 PM
04/25/09 07:52 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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If you took out the inner spring or if your spring pressure isn't too high I'd suspect the cam. I wont buy a MP cam(or valves) because of too many personal & purported failures.
live every 24 hour block of time like it's your last day on earth
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Re: lost cam lobe on break in twice
[Re: rusthole]
#299215
04/25/09 07:56 PM
04/25/09 07:56 PM
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Joined: Jan 2007
Posts: 168 Florida
hemisurfer
member
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member
Joined: Jan 2007
Posts: 168
Florida
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I am running a higher lift Comp Cams solid lifter in my 440 stroker and have had zero issues.
I am happy with Comp Cams, just a suggestion if your looking to switch to a another cam company.
Last edited by hemisurfer; 04/25/09 07:57 PM.
Chris
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Re: lost cam lobe on break in twice
[Re: hemigod426]
#299219
04/25/09 08:19 PM
04/25/09 08:19 PM
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Joined: Jan 2003
Posts: 2,374 west palm beach, florida
modelmakerinc
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,374
west palm beach, florida
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Quote:
ive done rockwell harness tests on cam cores their ok it was all the newer lifters that are a joke. most cam corps use all the same blanks for cams. all the good lifter corps are gone
If the cam 's hardness is good but the lifters aren't then why does the cam lobe fail and not the lifter?
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Re: lost cam lobe on break in twice
[Re: rusthole]
#299222
04/25/09 08:29 PM
04/25/09 08:29 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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i had a mp cam in a dakota with a 5.2l that was professionally installed and broke in. i had mp springs and the other goodies put in with it and it wore off 2 lobes within 2000 miles. i put in a summit cam and have since sold the truck due to the frame rotting out but it has 40000 on the summit cam and runs like a dream. now its someones firewood truck.
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Re: lost cam lobe on break in twice
[Re: rusthole]
#299224
04/25/09 08:47 PM
04/25/09 08:47 PM
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Joined: Jan 2003
Posts: 4,806 Moved to N.E. Tennessee
GomangoCuda
master
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master
Joined: Jan 2003
Posts: 4,806
Moved to N.E. Tennessee
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Quote:
I lubed the lifters on the bottom and sides and made sure they spin looslely.
Do not lube the sides of the lifters with the thick break in paste. The paste is for the lifter face and cam lobes only. If you put it on the sides it can prevent the lifters from spinning enough. Motor oil is all you need on the rest of the lifter and the lifter bores in the block.
There was a problem with bad lifters. Some were soft, some didn't have enough crown, some had the crown ground off center, and some were all of the above. If your lifters have been sitting on a dealers shelf for a few years, there's a good chance you got junk. I would only trust obviously very old lifters or very recent lifters.
Last edited by GomangoCuda; 04/25/09 08:52 PM.
In theory, there is no difference between theory and practice. In practice, there is.
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Re: lost cam lobe on break in twice
[Re: GomangoCuda]
#299225
04/25/09 11:17 PM
04/25/09 11:17 PM
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Joined: Oct 2003
Posts: 7,506 Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Lifter rotation problem. Dirt in the lifter bores/galleys, scoring, wrong lube on lifter walls ( previously stated ). A good test: With the side of the lifters and lifter bores lubed with light oil, they should slide down the lifter bores with only their own weight. If you can't acheive this, you might want to rent a broach and broach the lifter bores - I think hughes rents them.
Fastest 300
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Re: lost cam lobe on break in twice
[Re: rusthole]
#299227
04/26/09 10:41 AM
04/26/09 10:41 AM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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Quote:
I have the "hemi" springs rated to .500 lift, so I guess I am slightly weak with the springs. I lubed the lifters on the bottom and sides and made sure they spin looslely. I have a standard valvetrain. Maybe I should upgrade to solid lifters if that helps? Need to get this thing going!
if those springs are set up for 1.88 installed heigth they will coil bind before .509 lift. those springs are obsolete.
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