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Joined: Thu Sep 27th, 2018
Location: USA
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Check the actual oil pressure, get one of those cheap 8 dollar gauges from auto zone and see what the oil pressure actually is at idle and when you rev it a little.
Might be lifters, might be lifters not getting oil for a host of reasons. One could be the cam synch, maybe the gear is stripped out. A 4.0 will still run without a cam synch turning but you will get zero oil pressure.
Your gauge isn't really a gauge in the truck, look in any of them. They stay at half way.
Real sorry it didn't work out for you but I wouldn't give up quite yet.
Thanks, I'm gonna assume the only place to check oil pressure is at the sending unit? Makes no difference if it's idle or going down the road the noise is there
Didn't make the noise before I did the work though and so I'm confused.
Bolt the heads, torque, bolt rocker shafts, torque, no adjustment. Not rocket science.