Rod knock :/

[st2b]

Well it seems I have either have a RN or a spun bearing. I got everything back together and it sound like my engine is knocking. It's pretty loud. I think coolant could have possibly got into my oil or something. Could this happen from simply changing the intake manifold gaskets? I'm going to change my oil tomorrow and go from there.

Thanks guys,
Matt

 

[s383mmber1]

First, is it RPM dependent?

 

[st2b]

What do you mean by that? The RPMS are reading fine if that's what you mean? As far as I know the RPM gage is correct.

 

[s383mmber1]

What do you mean by that? The RPMS are reading fine if that's what you mean? As far as I know the RPM gage is correct.

When you rev the engine, does it get louder at the RPMS increase?

Thatll narrow your choice down of what creating the noise. Many think valvetrain noises are rod knock.

 

[st2b]

Yes it does progressively get get louder at higher RPMS. Could coolant in the oil cause this?

 

[BlackDynamite]

um yes it could, but if you hear the noise it's time for a rebuild......also try checking your exhaust manifold...i've heard of it rattling if it's loose....but i doubt it:\

But when you said you put it back together...what did you do?like Blown head gasket repair,etc

 

[st2b]

It ran perfect, then it wouldn't start. I had to remove the intake manifold to change the starter. Now it runs like crap.

Never touched anything internal

EDIT: Just removed the belts and the noise is still there, so I know it couldn't be anything belt driven.

 

[IJ.]

It ran perfect, then it wouldn't start. I had to remove the intake manifold to change the starter. Now it runs like crap.

Never touched anything internal

EDIT: Just removed the belts and the noise is still there, so I know it couldn't be anything belt driven.

Interesting concept that

 

[st2b]

I didn't have a long enough extension at the time to just go through it to get to the top starter bolt...

 

[OneJoeZee]

I didn't have a long enough extension at the time to just go through it to get to the top starter bolt...

Did you do this from up top?

 

[IJ.]

Can't see how you could get coolant in the Oil from changing an intake either..

 

[st2b]

I had to remove the oil line on the valve cover (Rather large hose) to get the alternator off, and possibly coolant got into the hose?


And yes I got it from up top

 

[AJ'S 88NA]

I believe you said in a earlier post that you had coolant somehow leaking around the intake. If it was leaking around the small return line on the intake manifold, you definatly could have sucked some coolant into the intake. Which means it probably got into the oil, compromised the bearings, result=RK.

 

[IJ.]

Pull the dipstick and have a look coolant should be obvious.

I'm guessing it's been run low on oil at some stage and picked up a bearing.

 

[cuel]

Man, that sucks. Injectors tick pretty loud sometimes as well, and can sometimes fool the untrained ear. Is it louder up in the engine compartment, or under the car?

 

[OneJoeZee]

And yes I got it from up top

Should have done it from the bottom.

 

[st2b]

I couldn't get to it from bottom.

But I do remember reading somewhere that if the knock sensor is hit it could go bad causing the engine to run like crap?

 

[IJ.]

Run it so it's rattling and pull an injector clip and see if it stops.

replace the clip and repeat, if it's RK it should stop at the right cylinder.

 

[BlackDynamite]

Could a loose starter cause a knock noise? i mean i'm just curious:]

 

[AJ'S 88NA]

Could a loose starter cause a knock noise? i mean i'm just curious:]

I would think it may knock when you try to start it if it was loose. But he's saying it's rpm related.

I'd do what IJ suggested to narrow down the cylinder.