I use to have this problem, Most of the time the noise that make it sound like a whistle or Turbo noise. Its the seals are leaking its ether header or Manafold. Get a new gasket for ether of those. Use a Brake Spray to test it out!
It depends on what is making the noise.
It retards / slows the engine timing up when it detects an engine knock / pining noise like bad fuel are valve noise.
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.
it will be your valve lifters common problem for the Mazda 626 engine when they start to get up in the milage
Yes, the purge valve clicks.
you have a stuck valve
A clicking noise in the engine of a 91 Ranger could indicate a problem with the valves. A valve lifter in the engine may be worn or stuck.
Bearing noise is usually deeper and comes from farther down in the engine. Lifter noise is more of a ticking and is up in the engine heads.
An engine "knock" will become more pronounced when engine is labored (climbing a hill) Valve noise will remain the same under stress
There could be numerous reasons why a Suburban is making engine noise at start up. It could be anything from a blown gasket to a spark plug. A mechanic will be able to find out the cause of the noise.
An "engine knock" will be more noticable when engine is labored (climbing a hill etc.) Valve noise will remain constant
a lot of noise when the clearances were allowed to be become excessive in the valve clearance.
My car, a 2008 Audi A4 Turbo was experiencing a cyclical chirping noise, similar to a noisy fan belt ( which it does not have). A defective PCV valve was found , however, the car after being repaired is still making that noise.
I am not sure as to what sound the noise is making but if it sounds like the engine is still funning after the car has been turned off it is the fan. Depending on what temp the engine is and the temp outside, the fan could run if its too hot.
Passenger side, valve cover, under the air intake hose, the ribbed hose. Make sure you check the hose too, mine had a hole in it making a crazy squeaking noise.
are you sure is a valve noise?? or is a piston slap?
no,if it is normal functional sound.if it is grinding or making some other kind of noise then there is definitely an issue.
If the 1999 Suburban noise is a sort of loud banging noise, the problem could be that the engine have jumped time. Jumping time would cause the noise and jerking in the engine.
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.
Maybe you have a miss in your engine?
It is possible that a part of the EGR valve has fallen out. This will cause a very loud exhaust noise.
Serious engine knock or valve train noise. Have this looked into by a pro.
If its coming from your engine, you may need a valve adjustment..
If you are talking about the PISTON RODS then they will not make any noise. The engine will just wear the pistons and cylinder walls until you have a problem with oil comsupition. If the push rods or bent then you will have a engine miss and rocker arm noise in the valve covers/ clatting noise.