marbles in my engine!! - SOUND ADDED

[CademiaX]

Ok, not really marbles in my engine. When I take off I can her what sounds like marbles bouncing around under the hood. I only hear at low rpms on take off, thats it.

Im worried its something to with the tranny, but I hope not.

The alternator was over spun, and it makes a funny noise. Haven't been under the hood to see if thats it yet.

Any ideas?

Sound Clip:
http://www.box.net/shared/5cxtzutdcp

 

[hawkeye18]

bad timing belt tensioner?

 

[FOMOCOTOSHO]

That's kind of what mine sounded like when the rod bearings went out. They're not too hard to fix with these awesome instructions from Phoenix:

http://www.shophoenixproject.com/rodbearings/rodbearings.htm

You can order the bearings from RCM or Rock Auto

 

[sho'noffmtx]

Do you have the diesel option? that would give you a marble sound.

 

[jonmon6691]

If its a manual, then my bet is on the throw out bearing going bad.

 

[TheScaryOne]

The marbles rolling around in a tin can sound can also be pinging.

 

[Racer X]

Broken up cats?

 

[SHOspazz92]

Does it only do it when the engine is under load?

-Sam

 

[CademiaX]

bad timing belt tensioner?

I am thinking your are right on the money. It has been spitting a bit, not missing and throw codes yet, but I bet that is around the corner.

Do you have the diesel option? that would give you a marble sound.

what diesil option?!

If its a manual, then my bet is on the throw out bearing going bad.

Dont think so, you only hear it in first on a slow take off.

The marbles rolling around in a tin can sound can also be pinging.

just went over the engine recently checking for knocks, pings and stuff. Didnt come up with anything. Did that because the heat shield was loose and I thought it was an engine knock.

Does it only do it when the engine is under load?

-Sam

Yes, on take off in first gear, and only when I take off slow, like from my drive way.

 

[SHO_91]

Bearing?

Maybe a bad idler pulley or accessory pulley bearing? They can sound gnarly sometimes, and stop making noise @ higher rpm...

 

[hawkeye18]

When my timing belt tensioner went, it would do it the worst on the 3-2 downshift. I had it set at 28mph (this is an ATX, mind you), and when it went it would kick the rpms up to about 1900 RPM and it would get really loud. If I hit the throttle, as soon as the engine hit 2k rpm it would just magically disappear. It just... turned off. And below 1500 rpm it wouldn't make any noise either. If that sounds kinda like what you're going through, my money's on the tensioner.

 

[93rev2sev]

low rpms - got it

Under load - got it

First gear only?

If yes to the last, it may be NORMAL transaxle noise.

 

[CademiaX]

Ok, just got back from lunch, the car now idles at 1000RPM, and bumps up to 1100RPM every 5-10 seconds and then back down. It usually idles around 850-900RPM.

And here is a sound clip:

http://www.box.net/shared/5cxtzutdcp

 

[Mrhappytuzi]

For some reason after reading this thread... i feel like playing marble madness on the old NES...


but with that sound clip.. i really dont hear much out of the ordinary..

seems like gear roll over to me. Wouldnt worry about it.

 

[pccorrig1]

IMO, definately not normal. Low hammering sound immediately after startup, and in the background. Sounds like the noise I'm trying to identify in my car. With a stethescope, sounds like #1 cyl in the source, and I suspect rod bearings.

If I get time over the weekend, I'm going to look for a lapel sized microphone that I can mount inside my stechescope, record, then post.

But at the moment, my '94 failed PA emissions test yesterday, with a EGR/DPFE/EVR related code 332 that I need to track down and eliminate.

 

[CademiaX]

well, thanks for the input guys, I am having the rob bearing done either way in the next week or so, however long it takes the parts to get here.

Also going to order a new timing belt tensioner. New alt as well, I know that thing is over spun a bit and just flipping out sometimes.

I will report back when this is all done. Might even have the shosource catback by that time

 

[bubba]

Sounds about right.... I didn't hear anything different that other times with a sho lol

 

[CademiaX]

haha, my cats are toasted, that's what all the rattling is, those only lasted a year.. damn, good thing they were free...

Still doing the rod bearings, timing belt tensionor, and guess the timing belt too while im in there.

 

[AREA 91]

With the car running, pull spark plug wires one at a time. Listen for the noise.

 

[CademiaX]

With the car running, pull spark plug wires one at a time. Listen for the noise.

guessing that will force the piston up and down without any help from combustion and make it so you can any problems a lot louder.