First of all, Chevy rocker arms NEVER tighten all the way up.
You probley have push rods BENT on both valves. But it sounds like the camshaft lobes are worn off and the bottom of the lifters are worn out.
Replace bent push rods and cam and lifters.
it could be loose.
Sure can, Quick A bent push rod will cause a loose rocker A loose rocker has no way to bend a push rod, there is no pressure.
Not usually. If the rocker arms are loose because the cam lobes are worn down, that could be an indication of a worn engine, which might have bad rings or loose valve guides, which would cause an engine to smoke.
get it tightened
the knock could coe from a few places, if it is in fact a "knock" it could be a piston rod, if its more of a tapping comming from the top of the motor you could have a loose rocker arm, if it is a loose rocker arm i would suggest tightening them up if it stops and comes back i would replace the lifters
Are the handlebars on your bike loose and need to be tightened?
Are your bike handlebars loose and need to be tightened?
Are your bike pedals loose and need to be tightened?
Could be,Wheel bearing failure,Lug nuts not tightened properly,Lug nuts over tightened,Incorrect wheel for that vehicle,Ball joint failure,
In an OHV -over head valve- engine the pushrod is contained on one end by a valve lifter which is running up and down on the cam lobes, and on the other side by a rocker arm, which is transfering that force to the valve stem. Three things could cause the pushrod to be able to move out of its position and fall into the recesses of the engine. 1.wear- the pushrod ends, the spring inside the valve lifter, the rocker arm pivot point and wear points on valve stem side and pushrod pocket side, as well as the surface the rocker arm mounts to, and the valve stem end. These surfaces can wear and result in too much slop in the valve train, and when the valves are moving, the rod can find its way out of place. If the spring inside a lifter wears out and breaks, as soon as the oil pressure drops there will be enough room for the rod to escape on the next start.(assumes hydraulic lifters) 2.misadjustment- If valve lash adjustment is performed incorrectly, the rocker arm may become loose during its up down cycle, causing the rod to walk off, or damage may actually occur causing the rod to spit out. If the rocker arm mounting stud or nut is not torqued correctly, this can cause the rod to be lost 3.damage- If any of the components above have been damaged or have hairline fractures (common on stamped rocker arms) or are otherwise bent or deformed, it will impossible to maintain the proper clearances David W. Career Mechanic
The rocker arm on a 1996 Lincoln 4.6 liter engine may fall out of place due to several factors, including a worn or damaged rocker arm assembly, insufficient lubrication leading to excessive wear, or a failure of the pushrod or valve spring assembly. Additionally, improper installation or a loose retaining clip can also result in the rocker arm dislodging. Regular maintenance and inspections can help prevent these issues from occurring.
Could be an exhaustn leak, however, probably a loose pushrod. If it is running alright, it won't be for long unless you get the valves adjusted.