4.9L ticking noise
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#2
It very well could be. When the oil is cold, it's thicker, and oil in the lifters takes more to compress (thus no tick). Once it warms, the oil is thinner and allows them to compress easier and tick.
You could try a jug of Marvel's Mystery Oil during your next oil change to see if that might free it up and get rid of it.
However, before you do that, double check that it isn't your PCV valve that isn't making the noise on the back end of the valve cover. They'll make some noise when they go out and are only a couple bucks to replace.
You could try a jug of Marvel's Mystery Oil during your next oil change to see if that might free it up and get rid of it.
However, before you do that, double check that it isn't your PCV valve that isn't making the noise on the back end of the valve cover. They'll make some noise when they go out and are only a couple bucks to replace.
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another thing to check are your rockers...and everything under them. i have come across more than a few mistreated engines that have old oil and gunk that has built up over time. some had bent pushrods, others with clogged pushrods, dead lifters, and loose rockers. once you flush it out and its still giving you a headache...might be a good idea to dig into the valvetrain a bit. feel free to PM me with any questions.
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#8
#9
I just find it strange that it gets worse as it gets warmer. Generally, all exhaust noise issues I've had are the opposite. The metals expand with heat and help to seal the leak, reducing noise. I also wouldn't think exhaust, lifters, valves, etc. would be intermittent.
However, changing out the donut is easy (the only difficulty associated is determined by how rusted in place the exhaust bolts are) and cheap. The donuts are about $5 or so.
However, changing out the donut is easy (the only difficulty associated is determined by how rusted in place the exhaust bolts are) and cheap. The donuts are about $5 or so.
#10
One good thing to have hanging on the wall in the garage is either a good mechanics stethescope, or even a few feet of garden hose. listen around the engine bay at various locations on the block, around the covers, etc. to help eliminate potential sources of the noise. it may not help you determine exactly whats going on, but it'll get you pretty close.