Strange engine noise

Hi, I've taken notice of some noises that my car makes when running. There is the usual tapping noise that I kind of know what it is. But there are other strange noises that the engine makes that I don't know where its comes from. One noise I can hear when the car is in idle or when I slow down, its like a "sizziling" noise. And then there is a little faint "rattle" noise that I hear when I accelerate from a stop. Anyone know what this could be?

I'll post a video later to better inform about the situation. Thanks.

Here is a link to the video of my car. If you could please watch it and tell me what the problem could be. I know it sounds bad, but with a little treatment oil the tapping noise goes away, but its the sizzling sounds that scare me, I think it might be an open electrical connection thats making that sound. Thanks for any help.

http://www.youtube.com/watch?v=AKGRjexzqFA

I may post another video later when the tapping noise is gone.

That sizzling noise could be a vacuum leak. Does it make a hissing sound. It will be most noticable at idle and can be the reason the car hesitates. Locate the vacuum hose at the intake manifold and back track it to find the leak.

Look at the back of the throttle body at the vacuum hoses that run to the PCV valve. These are bad about collapsing and getting a hols in it. It could also be part of the tapping you hear. Can cause the PCV to bounce and cause a tapping noise.

Is there possibly an exhaust leak too at the manifold?

:confused: I'll check on all of that. thanks

that old engine isnt getting top end oil also with a ignition miss on 1 or 2 cylinders you can see it shaking

Really, you can tell that from the video? I actualy use 5-30 synthetic oil. I haven't done a spark plug check yet.

Pull PCV and hold thumb over it to see if noise goes away. Looks like the valve is fairly new, but if there is not enough vacuum to it, it will rattle and sound like the lifters sre wanting to come out of the engine.

Recently days ago I changed the PCV valve, but the tapping is usual, I can actualy on seem to get rid of it if I use some Roselin Treatment oil. But the PCV valve seems fine, no jumping or movement. I checked 1, 2, 3 and 4 sparkplugs to see if they sparked and yes it all checks fine. I havent done an intake check to see if there is a leak or a vacume. But when I was checking the engine the buzzing or sizziling sound was constant and I could hear that it came from or near the alternator area. I had a different alternator before and it still made the noise, but with a new one the noise is still there. It sound like if you would hear in the movies where electricity is shown buzzing around. Thanks for all the input. Does anyone know if a major teardown of the engine has to be done? Maby the camshafts or a connecting piston rod might be the cause of the noise?

thats a big investment... what year and how many miles? I would check everything twice before you do an engine job

Take the belt off the engine and run it just a couple of minutes and see if the noise is still there. If noise is gone, belt, dirty pulleys, idler or tensioner bearings will likely be the cause. If noise is still there, it is internal.

Hey good advice. Never would think of doing that. I'll try it soon.

Well just this morning. My engine started acting up. It moves strongly from side to side and a large amount of white smoke come out the tail pipe. Its never done this before. Does anyone know what the cause could be?

CHECK your rad to see if its drinking anti freeze.I was trying to get back to you but got buzy at work.That sizziling noise could be a cam follower going away.Top end of your engine could be plugged with wax buildup IN SIDE YOUR VALVE COVERS.If its drinking anti freeze kiss it good bye.MAJOR WORK COMING

Yup its burning antifreeze. BUt it doesn't show any draining from the resevoir. But I went to AdvanceAutoParts and they told me to use a strong radiator leak stopper. Just applied it to my car. And I hope that should stop the shaking and the white smoke. It showed a little iprovement after I aplied it. They say I may have to replace my head engine gasget where they think might be cracked, leaking coolent into the cylenders. I'll post back more info about it as time flies.

Sorry old cum but it is a head gasket and you mite as well change them bout.how many miles on this old girl???if it over 100 thousand milesyour better off finding another engine ( NEWER)besides the head gasket you got top valve train worn out so look for another engine:headshake :headshake :headshake :banghead: :banghead:

Another engine would be great. But no funds available to purchase one. And about the miles I think its way beyond the 100thousand mark. The number is actualy stuck around 95,000. But since I've had it, its been in very long trips, and has been actualy very reliable, but it looks like its towards its end of life. Anyways, right now this car is my only dependalbe form of transportation. So I kinda can't give up on it.