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Re: CAR KNOCKING / 1984 CHEVY CAPRICE
It could be a rocker arm as well as a lifter or even a rod, you need to determen ware its comming from top end or bottom end. With engine running take a long screwdriver hold the handle end to your ear and other end to rocker cover the whole length of cover, both sides if there is a loose rocker you will hear it, same on oil pan if you suspect its a rod. You would be surprised on how much you can hear thru that.
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What has happened more than likely, unfortunately, the internal piston seals on the servo controls have gotten hard and not usable after this period of time sitting still. The answer is to remove and replace all the seals inside the transmission. Sorry this is the answer, but that is from my 35+ years experience in trans. overhauls. You should not have to replace clutches and plates, also make sure there is no rust on the internal drums from sitting still.
sensor may be bad or wire or guage, never trust sensors, they leak.rust and come loose, the guage may be loose in the cluster, more likely the sensor is getting air around it, it cann or work out of waterm hense make sure your water levevl is good and clean,Matt
Sounds like in cold temperature there is a lack of oil to vital moving parts of engine. Try changing oil to a lighter weight for example 5w-30 or 10w-30. After doing this have oil pressure checked manually with a handheld guage and make sure there is good oil pressure in engine. Good luck and thanks for using FIX YA.
Have you checked your valves? Pistons? injectors? Those are three things that can cause a knocking noise, and doesnt always have to be that you are out of any fluid. Another thing is to drain the oil and check for metal in the oil pan. There is a magnet inside the pan that attracts anytype of foreign metal. That would be a good starting point