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Old Jul 9, 2024 | 08:50 AM
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Default Valve ticking

I have a valve tick that started yesterday. When I got home from work I pulled the valve cover and the rocker on the drivers side closest to the firewall is really loose. I tightened it as far as I can and it’s still loose. I pulled the rocker off and checked the push rod and it’s good too. I put everything back together and it’s still loose. I cranked the engine and all the rockers seem to be moving normally. Any suggestions/advice would be appreciated.

its a junkyard motor out of a 2000 so I don’t know how many miles it has on it. It’s a 5.3

Last edited by DougEFresh; Jul 9, 2024 at 08:52 AM. Reason: I forgot to mention
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Old Jul 9, 2024 | 10:03 AM
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bad lifter maybe?
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Old Jul 9, 2024 | 10:42 AM
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That’s what I’m thinking. The only thing that’s confusing me is when I turn the motor over all the rockers still move like normal.
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Old Jul 9, 2024 | 11:16 AM
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Here are a couple videos I just took.
Attached Files
File Type: mov
IMG_7302.mov (4.91 MB, 9 views)
File Type: mov
IMG_7301.mov (15.18 MB, 6 views)
File Type: mov
IMG_7303.mov (16.12 MB, 7 views)
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Old Jul 9, 2024 | 11:22 AM
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I’m hoping to get an answer before I start taking off the head.
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Old Jul 9, 2024 | 02:01 PM
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so - is this the GMC? does it have the AFM? I think it's a collapsed lifter, partially collapsed. gummed up? maybe run a cleaner thru it?
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Old Jul 9, 2024 | 02:27 PM
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Yeah it’s a 2001 Gmc Sierra. I don’t think it has AMF.
It’s not gummed up. I ran cleaner through it about 2 months ago.
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Old Jul 9, 2024 | 02:34 PM
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rislone works really well at unsticking lifters. Check the length of the push rod. swap rockers around etc. It obviously shouldn't' be loose but only a few things could cause that.
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Old Jul 9, 2024 | 02:37 PM
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Originally Posted by Forcefed86
rislone works really well at unsticking lifters. Check the length of the push rod. swap rockers around etc. It obviously shouldn't' be loose but only a few things could cause that.

I did switch rockers and pushrod around and same issue. I’m in the process of pulling the head right now. All the pushrods are the same length.
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Old Jul 9, 2024 | 02:52 PM
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keep us posted. with pictures. please
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Old Jul 9, 2024 | 02:53 PM
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hopefully a lifter and not a jacked cam lobe
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Old Jul 9, 2024 | 02:57 PM
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Yes let’s hope. 🙏🤞
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Old Jul 9, 2024 | 05:21 PM
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Hopefully the piece isn’t in stuck in the motor somewhere. But it’s my work truck and I need it back on the road so pray for me lol.

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Old Jul 9, 2024 | 10:57 PM
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All back together and running with no ticking!!!!! Thank you guys!!
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Old Jul 10, 2024 | 07:07 AM
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dang dude - you are fast - nice job
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Old Jul 10, 2024 | 02:29 PM
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Originally Posted by bleepster
dang dude - you are fast - nice job
Thanks bro. It was 112 degrees too so I took a lot of breaks lol.
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