clunk
NAXJA Forum User
- Location
- West Kootenays, BC (canada)
Ive been trying to track down this noise lately, have posted a couple times with no replies. I know that diagnosing a noise is hard over the internet, but I can't think of where else to look or where else to ask. Hopefully someone can give me an idea of what to look for. I can search and use to haynes manual to diagnose problems, but I'm not sure what would be making the same clacking noise my jeep is making.
To best describe the noise, would be to say it is a clacking/ticking noise..tak-tak-tak. Not a deep pitch at all, more like a high-pitched clack of two spoons together, only really amplified to the point that people on the sidwalk can hear it if I drive through town.
I have used a long screwdriver held to my ear as well as a length of pipe with a socket extension jammed in the end to try and identify where exactly the noise is coming from, but to no avail. The closest I can get it that it's top end noise, coming from the rear of the engine. I can hear every other normal tick in the engine(rockers moving, fuel injectors etc--they all sound smooth and uniform), but just can't identify the noise from any specefic part of the top end. (ie: I can't identify which cylinder it is coming from). I can safely say that the noise does not come from the bottom end of the engine.
Over the past few days I have really been observing what is happening and when it happens. I have noticed that the engine will run entirely smooth and quiet from cold or warm startup as long as the tempurature does not rise past around 150*. After this, I can hear the ticking start, just barely. By the time the engine reaches it's normal temp at around 205* or so, I can pretty much count on the tacking noise becoming more and more frequent, and louder and louder. The noise is still intermittent, but is far more likely to happen than if the engine is cooler. This probably has to do with oil viscosity. My oil pressure is within factory specs with 10w30 oil, though which has me a little confused.
The jeep has been making this same noise for over 3k, and I don't feel that I'm lacking any power. My idle is a *little* rough, but blips between around 675-700 rpm, which I attribute to a small vacuum leak. The engine has just over 100k, burns 1/2qt of oil per change and does not have any blowby. If the noise wasn't so damn loud, I'd just live with it..but it's finally driving me crazy. The noise always gets louder as the engine heats up, then stays around the same pitch until I get home. Let it cool down to below 150* or so and it'll run smooth and quiet again until the engine heats up again.
So, where else should I look? Is this just the classic case of a failing lifter and I'm looking over it, or is there something else that could be causing the problem?
To best describe the noise, would be to say it is a clacking/ticking noise..tak-tak-tak. Not a deep pitch at all, more like a high-pitched clack of two spoons together, only really amplified to the point that people on the sidwalk can hear it if I drive through town.
I have used a long screwdriver held to my ear as well as a length of pipe with a socket extension jammed in the end to try and identify where exactly the noise is coming from, but to no avail. The closest I can get it that it's top end noise, coming from the rear of the engine. I can hear every other normal tick in the engine(rockers moving, fuel injectors etc--they all sound smooth and uniform), but just can't identify the noise from any specefic part of the top end. (ie: I can't identify which cylinder it is coming from). I can safely say that the noise does not come from the bottom end of the engine.
Over the past few days I have really been observing what is happening and when it happens. I have noticed that the engine will run entirely smooth and quiet from cold or warm startup as long as the tempurature does not rise past around 150*. After this, I can hear the ticking start, just barely. By the time the engine reaches it's normal temp at around 205* or so, I can pretty much count on the tacking noise becoming more and more frequent, and louder and louder. The noise is still intermittent, but is far more likely to happen than if the engine is cooler. This probably has to do with oil viscosity. My oil pressure is within factory specs with 10w30 oil, though which has me a little confused.
The jeep has been making this same noise for over 3k, and I don't feel that I'm lacking any power. My idle is a *little* rough, but blips between around 675-700 rpm, which I attribute to a small vacuum leak. The engine has just over 100k, burns 1/2qt of oil per change and does not have any blowby. If the noise wasn't so damn loud, I'd just live with it..but it's finally driving me crazy. The noise always gets louder as the engine heats up, then stays around the same pitch until I get home. Let it cool down to below 150* or so and it'll run smooth and quiet again until the engine heats up again.
So, where else should I look? Is this just the classic case of a failing lifter and I'm looking over it, or is there something else that could be causing the problem?
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