Very Strange Noise.. HELP!

[[__--MUD--__]]

So its definately in the motor if it does it in park...nothing in the engine bay that moves or can jump around while not moving.

I'd lay $5 your check engine like is probably a knock sensor getting tripped from the rattling the engine is making.

Do you know the broom handle stethoscope trick? I use the kind you can inscrew from the broom head and stick the end straight in your ear.



You can pinpoint engine noises that way. I wouldn't drive that mother ****er if I were you untill you figure out where the noise is coming from, trashed motor wouldn't be fun. I'd start by the base of the intake where it meets the heads. The next thing I'm pointing at is a lifter, push rod or rocker. Those will make a hell of a racket at low rpm if any of them came unglued. Start hunting around w/ the broom handle, it wont cost you anything. Just make sure you dont jam the end in the serpentine belt while its running. I've seen that happen before. Good luck!

[markdoddridge]

Originally Posted by [__--MUD--__]

So its definately in the motor if it does it in park...nothing in the engine bay that moves or can jump around while not moving.

I'd lay $5 your check engine like is probably a knock sensor getting tripped from the rattling the engine is making.

Do you know the broom handle stethoscope trick? I use the kind you can inscrew from the broom head and stick the end straight in your ear.



You can pinpoint engine noises that way. I wouldn't drive that mother ****er if I were you untill you figure out where the noise is coming from, trashed motor wouldn't be fun. I'd start by the base of the intake where it meets the heads. The next thing I'm pointing at is a lifter, push rod or rocker. Those will make a hell of a racket at low rpm if any of them came unglued. Start hunting around w/ the broom handle, it wont cost you anything. Just make sure you dont jam the end in the serpentine belt while its running. I've seen that happen before. Good luck!

Wow thats awesome, thanks!

[markdoddridge]

Ok so i just took it into the dealership, they say its the catalytic converter that needs to be replaced at $800. also they need to clean the fuel lines ($300) or it will mess up the new converter, and they reccomend a tune up ($700) which changes out the spark plugs and wires etc..

I told him to hold off on the repairs until i can do some research. Does this sound legit? im worried it was just the bolts on the intake manifold that came loose and they are going to charge me for all these unnecessary repairs

[H2005]

I would get a second opinion the stealerships are usually out to **** you over

[giant h2]

Originally Posted by markdoddridge

Ok so i just took it into the dealership, they say its the catalytic converter that needs to be replaced at $800. also they need to clean the fuel lines ($300) or it will mess up the new converter, and they reccomend a tune up ($700) which changes out the spark plugs and wires etc..

I told him to hold off on the repairs until i can do some research. Does this sound legit? im worried it was just the bolts on the intake manifold that came loose and they are going to charge me for all these unnecessary repairs

dirty fuel lines? how does that Jack a converter?

[markdoddridge]

Originally Posted by giant h2

dirty fuel lines? how does that Jack a converter?

And why do both need to be replaced? seriously questioning this now....

[HummerMann]

It sounds to me like it could be the cat O2 sensor giving you the check engine light. Unless someone ran leaded fuel in your engine to cook your cat, I'd be very leery of replacing the cat. The fuel line cleaning makes no sense at all to me - that's why I hate stealerships. They told me on a BMW I had 15 years ago the clicking noise at idle only was my injectors and they wanted $1500 to clean them. It turns out the Peake codes were for the VANOS circuit board and I fixed it myself for 130. It was the last dealing I ever had with that dealeship and BMWs, and I REALLY miss my old Hummer dealership here which had the best mechanics I ever dealt with.I would definitely get a second opinion.

[[__--MUD--__]]

well this just jogged my memory.... There is a crappy shield between the cat and the floor pan. It can rattle making an odd noise. The fix is a big ass band clamp if I remember correctly.

Seriously, use that broom handle and you will find where the noise is coming from.

Those plugs are good for 100,000 Miles. I sure as **** wouldn't pay someone $700 to swap plugs and wires. There isn't even a distributor on these motors. Individual coils are right over each cylinder.