Engine running hotter then 220 degrees can cause valvetrain noise.
Bad fuel can also cause valve noise / PINGING sound.
Ignition timing to high / Advanced to far, can also cause engine noise.
No adjustment. If there is valve clatter, valve train parts are worn.
Serious engine knock or valve train noise. Have this looked into by a pro.
There is no valve adjustment on that engine. If you have noise coming from the valve train you probably have worn parts such as camshaft, lifters, pushrods, rocker arms and valves.
You don't. The nuts that hold down the rocker arms are torqued down to specs and that's it. There is no adjustment. If you have valve train noise you probably have worn valve train parts.
At 150 k miles first check oil pressure at engine hot with a known accurate gauge. Make sure that the pressure exceeds the minimum mfg specification for the engine. If the oil pressure is ok, then use a mechanics stethescope to locate the exact area of the noise. High on the engine indicates valve or piston related, middle on the block indicates piston and low on the block is lower end, ie bearings rods or mains. Make sure you correctly locate the noise before tearing into the engine, nothings worse than making an erroneous diagnosis when it comes to time and dollars... If the noise is indeed in the top of the engine then pull the valve cover and check for wear in the valve train. Repair or replace pivot points, lifters, etc. as may be required.
check valve train it can be loose or tooo tight
Cam Bearings
It has hydraulic lifters, no adjustment. If you have valve noise you probably have worn valve train parts. Replacement of worn parts would be required.
Lifter noise is not uncommon.
There could be several reasons why you have a noisy hydraulic valve lifter. One reason could be worn our parts in the entire valve train. A loose rocker arm could also cause noise.
Yes. The head gasket forms the seal between the engine block and the head(s). The valve cover gasket seals the gap between the valve cover and the valve train it is covering.
Worn valve train starting with the camshaft lobes.