DougEFresh

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

bleepster

iTrader: (2)

bad lifter maybe?

DougEFresh

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.

DougEFresh

Here are a couple videos I just took.

DougEFresh

I’m hoping to get an answer before I start taking off the head.

bleepster

iTrader: (2)

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?

DougEFresh

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.

Forcefed86

iTrader: (4)

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.

DougEFresh

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.

bleepster

iTrader: (2)

keep us posted. with pictures. please

bleepster

iTrader: (2)

hopefully a lifter and not a jacked cam lobe

DougEFresh

Yes let’s hope. 🙏🤞

DougEFresh

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.

DougEFresh

All back together and running with no ticking!!!!! Thank you guys!!

bleepster

iTrader: (2)

dang dude - you are fast - nice job

DougEFresh

Thanks bro. It was 112 degrees too so I took a lot of breaks lol.