Cam troubles
01-16-2019, 05:09 PM
#1
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Cam troubles I installed a cam in my 2011 5.3 Silverado the motor only has 5k miles on it everything is new and the cam specs are 590/224/110 and it’s making a lot of bad noises from up top and I’ve checked the rockers and pushrods 3 times and re torqued them several times and I just can’t figure out what’s wrong with it
01-16-2019, 05:32 PM
#2
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Pull the valve covers and watch how everything moves while someone turns the crank by hand. You could have a lifter issue or maybe you didn't line up the cam with the crank on assembly or maybe it's a dozen other things. Only way to know is to find what part isn't moving right.
01-18-2019, 04:39 PM
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It’s has blue ls3 springs and ported and polished 799 heads but that was all done 5k miles before the cam was put in all I did was slide the old cam out witch was a gm ls2 hotcam and put the new one in and changed to a melling performance oil pump the cam is a custom cam through mikes performance motors
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01-18-2019, 06:42 PM
#8
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I think the valve springs are the culprit. Your cam has a higher lift than the springs are rated for. You might be having coil bind. I would check that out before it drops a valve