We have loud ticking noise (possibly a lifter or two?) under the hood that starts after driving the truck from about 10-15 minutes. We have to pull the truck over and let it sit for a few minutes before starting it back up and then all sounds fine. We used to be able to let it warm up for about 30 minutes and it would be fine, but not any more. Doesn't seem to be any loss of oil, because the oil level /pressure always reads fine.
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Re: Ticking Noise in 01 Chevy Silverado 2500
If noise is higher pitched and coming in on valve time...(2wice for every revolution of motor..ie: faster)...then upper end pressure is down due to sludge, wear , lifter failure, valvespring failure,rocker stud lifting out of cylinder head (kinda common) cam bearings failing (very rare)..oil pump bypass stuck open..and a few other possibilities... respond and we will go over lower end sound (deeper ,slower) and see what identifies your issues .... miles
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The ticking noise could be a faulty hydrulic valve lifter. When last was the oil & filter changed, it coul be that the oil is thick and not going through to the lifters and when it warms up the oil is thin. It could be that the engine is need of an overhaul as 148.000 miles is 238.182 Kilometers and that is a hi milage.
A leaking exhaust manifold could make a ticking noise. So could a lifter or valve. The exhaust noise would be louder under load. If the carb is running too lean, or you have a vac leak, the lean fuel mixture could make the exhaust leak worse, and cause the loss of power.
if your lifters are sticking, you can try using MARVEL MYSTERY OIL. depending on the mileage and whether it's dual over head cam or over head valve ,their is a chance that a cam lobe could be worn or a rocker could be worn or slipped off. a lifter will collapes and some can even replaced without removing the head.
Your engine code (DTC P0442 Evaporative Emission (EVAP) System Small Leak Detected ) should not have anything to do with a ticking sound. The evaporative system keeps you from having a gas smell under the hood and in the car.
As far as ticking goes ... it could be many things. You are correct, it could be lifters. If you take a long screwdriver and with the engine running place the handle end against your ear and touch the blade end to the top of the valve cover the screwdriver will act as a stethescope. If the ticking gets a lot louder somewhere on the valve cover then yes, you have a lifter making noise. If the motor ran really low on oil, and then one or more lifters started ticking you can try running about a half quart of transmission fluid in the oil for about 15 minutes at ididle while gently changing the rpms between idle and about 2500 to see if it loosens up the lifter(s). Change the oil after you do this.
To test the PCV valve, with the engine running pull the PCV valve out of the valve cover (leave it attached to the vaccuum hose) and place the tip of your finger against the now exposed tip of the PCV valve. It should make a snapping noise and **** your finger against the opening in the valve. If it does not, then make sure the vaccuum hose does not have a leak in it. If the hose is good, shut the car off, remove the valve from the vaccuum hose, and use some carburetor spray and clean it out. I clean mine each time I change the spark plugs. If the valve is stuck or clogged this could be causing the oil pooiing problem in the air intake tube you describe from excessive crankcase pressure.
If you still have not found the ticking noise, it could also be in the lower end of the motor. This is the only "bad" place for it to be out of what I have described. If it is a lifter and the noise is not really loud, it is not dangerous to drive.
No I would not chase to the pistons, these vehicle were very comon in creating HLA noise hydraulic lash adjusting valves, meaning the valves pump up with oil as the oil gets thinner they dont pump up as fast and create a very loud ticking noise, I would not express a great concern over simplicity, dodge was famous for this, they really were.
It's called a lifter. It is not serious. Keeping your car under good maintenance should keep the noise down but you will always hear it until you get the lifters replaced. Or that is what i was told. I have had my 1988 Fox for ten years now and it has always made that noise. Don't worry. :)
I bought a used 05 Silverado and it had started to get a ticking noise. I had one of the lifters replaced as it was determined that it was sticking. A week later the oil pump went. Replaced the pump and have not had any issues since.