Car making a knocking sound?

[ChoaticWhisper]

I know this cant be good. I kinda afriad to hear the answer, But Mostly when the car is idleing I know a knocking sound. Its got over 100k miles on it so I know its gonna need some work. I just hope its not to much.
Please if anyone has an idea please help.

[nunyadam]

We need a lot more information. type of car, knock bottom of the engine? top? what engine?

[ChoaticWhisper]

Sorry In a little hurry doing some other stuff, Just thought I would post to see if anyone knew before I went to someone that will charge me to to look at it.
I really dont know anything about cars, But it sounds like its on the very top of the engine.
I dont know much about it.

1995 Nissan 200sx SE
I cant remember the size of the engine I think 1.6L 4 cylinder

The car is not with me right now I cant really try anything right now. But I would love some help.

[Atomic Rooster]

Sounds like a valve train problem. Being that it does have over 100k, it would be a good idea to take it in and have it checked.

[pickel]

Pull off the valve cover..could be something as simple as a loose adjuster or collapased lifter.

[RedFury]

Good chance that one of the hydraulic lifters is bleeding off pressure at lower RPM. Or it could be piston slap, or a variety of other things. I've been driving with a noticeble knock from my engine for the last 20,000 miles and it hasn't gotten worse, and I've only done 1 oil change in that period ( it's about due now I'd say ). If you are worried, have a shop take a look-see.

[Brainchild]

Yeah I'd say its a valvetrain problem.Lifters tend to make some noise when you get 100k miles on them.
The sooner you have it fixed the cheaper it will be to repair.

[butch81385]

im still trying to decide if i should get an oil change... for the past couple of years i merely just dump another bottle in every week... it changes itself

[RedFury]

need to change that filter though, as a clogged filter can cause low oil pressure issues, and low oil pressure issues will affect the top of the engine a.k.a the valvetrain.

[brandon184]

Originally posted by butch81385
im still trying to decide if i should get an oil change... for the past couple of years i merely just dump another bottle in every week... it changes itself

Yikes.