Help! Clicking / Knocking Noise

[JohnnyC]

I was driving home tonight, and stop at a red light. Out of the blue, when I get going again, there is a clicking/knocking noise coming from the engine bay. No CEL, no warning lights at all. It was making a god awful noise, only when I got on the gas. I pull into a gas station a couple miles down the road, and pop the hood. Reved it up a bit with the throttle cable, and could here it again.... Can't pinpont where it's coming from exactly. .... I start driving again, and notice that I hear it in 1st gear once I get up to 2k, 2nd gear I wont hear it till about 3k, and by 5th gear, I cant hear the noise at all..... Throughout all the gears though, I DO hear it when I press the clutch petal in..... I'm really worried .... Any ideas of what it is? If the internals were !&^@ up, wouldn't it make the noise at all speeds? Can't see to well now, I'm gonna let her sit over night and see whats goin on in the morining. Could it be a clutch problem since I hear it when I press the clutch petal? BUt if that were the case, then why do I hear it in 1st once it gets up to 2K RPM.... and then again in 3rd at 3K RPM?

Ideas, suggestions and help is welcome.

Thanks ALot.

And by the way, I can't really feel anything different, its just that noise.


-John

 

[power=dsm]

ya this sounds like rod knocking!
when my car was knocking you counld only hear it till around2000-2500 in the begining anything after that it was fine, till of course it spun the #2 bearing and everything went to hell

 

[97ClipseDSM]

I was driving home tonight, and stop at a red light. Out of the blue, when I get going again, there is a clicking/knocking noise coming from the engine bay. No CEL, no warning lights at all. It was making a god awful noise, only when I got on the gas. I pull into a gas station a couple miles down the road, and pop the hood. Reved it up a bit with the throttle cable, and could here it again.... Can't pinpont where it's coming from exactly. .... I start driving again, and notice that I hear it in 1st gear once I get up to 2k, 2nd gear I wont hear it till about 3k, and by 5th gear, I cant hear the noise at all..... Throughout all the gears though, I DO hear it when I press the clutch petal in..... I'm really worried .... Any ideas of what it is? If the internals were !&^@ up, wouldn't it make the noise at all speeds? Can't see to well now, I'm gonna let her sit over night and see whats goin on in the morining. Could it be a clutch problem since I hear it when I press the clutch petal? BUt if that were the case, then why do I hear it in 1st once it gets up to 2K RPM.... and then again in 3rd at 3K RPM?

Ideas, suggestions and help is welcome.

Thanks ALot.

And by the way, I can't really feel anything different, its just that noise.


-John

Hmmmm..sounds like your lifters are ticking. If your sure its Knocking, than forget the lifters but the problem you describe is usually a lifter tick at low oil pressure during low rpms. Might want to add some lucas stabilizer or engine restore during your next oil change, & even try thicker oil. Good luck, i hope the knocking isnt the case.

 

[oldman]

check the harmonic balancer.

 

[JohnnyC]

Well, my uncle (mechanic) looked at it today. He said that to him it definitely sounds like a rod kncking, or possibly a chunk of carbon that broke off, and is rattling around. He's gonna run Carbon Cleaner through it tommorow. If that doesn't solve it, then unfortunately I think it probably is a rod knocking. He can take the engine apart and do some work after hours to save on labor costs, if it comes down to that, which I hope it doesn't.

I still have a few questions:

1) If it was rod-knock, why can't you hear it at idle, can't hear it in 3rd gear or above, until you press the clutch in? Wouldn't a rod knock be constant? It also wasn't knocking under boost. Also, where would rod knock noise come from? This noise is right up around the valve cover.

2) My dad doesn't think that lifter tick would be that loud..... I mean it is a pretty loud noise, which can definitely be heard over road noise. So...I'm guessing it's not lifter tick, but not sure...?

3) Could it be a loose pulley or something?

4) Since I got the car in August, and just until now, when this noise started, the RPM's fluctuated from 1500 to 1000 at idle. When this noise started, I notice it had been a smooth idle at around 1K.... 've heard of carbon builind up around the throttle, cauisng idling problems, so is it imaginable that maybe carbon did break off , and is making the noise, or is that idea way out there?

I wish I had a digi cam that could take video, and record it....

So where I stand now is, my baby is sitting in my Dad's driveway.... I'm definitely not driving it till we figure out what the problem is, becuse I don't want to do any further damage..Although it was driven for a bit after the noise first occured. If it has to go to my uncle's shop it will be towed.

Anyway, I just hope it's not to serious, or expensive to fix .

 

[RedRain]

http://home.comcast.net/~redrain19/Engine.wmv

Does it sound something like that? Ive gotten some responses of what it could be, but Im going to be replacing all timing belt and belt accesories, like pullies, tensioner, waterpump, balance shaft belt, etc. Basically everything on the timing belt side. If anyone has heard this noise before, can you please point it out.

-Thanks

 

[power=dsm]

what size injectors you runiing it could be them ticking???

 

[Ant]

http://home.comcast.net/~redrain19/Engine.wmv

Does it sound something like that? Ive gotten some responses of what it could be, but Im going to be replacing all timing belt and belt accesories, like pullies, tensioner, waterpump, balance shaft belt, etc. Basically everything on the timing belt side. If anyone has heard this noise before, can you please point it out.

-Thanks

my old Mazda MX-6 2.2L sohc Turbo sounded like that after I changed out the cam shaft. but I was stupid and got one from a junkyard

 

[JohnnyC]

http://home.comcast.net/~redrain19/Engine.wmv

Does it sound something like that? Ive gotten some responses of what it could be, but Im going to be replacing all timing belt and belt accesories, like pullies, tensioner, waterpump, balance shaft belt, etc. Basically everything on the timing belt side. If anyone has heard this noise before, can you please point it out.

-Thanks

Nope, this sound is much louder and more distinctive... But it just really doesn't sound like its coming from the bottom end.

For anyone who's had rod knock, did you always hear it no matter what speed the engine is running at, or what gear you were in?

 

[RedRain]

I was told that it could be a tensioner bearing. It doesnt sound like it is coming from bottom end at all. It is in the timing belt side where all the pulleys, bearings, and tesioner is. I am going to be getting a list of things:
http://www.vfaq.com/mods/Tbelt-checklist-pre.html
Ill let you guys know by next week what happens and what I find in there. Hope you can still help and probably pinpoint a problem. Thanks with the help so far though.

 

[trbotaln]

be careful because my egr solenoid ticks extremely loud when I'm at low rpms and it sound like rod knock. It drives me nuts By the way you can really only hear it when your in the car and if you open the hood it is very hard to pinpoint the noise. A mechanics stethascope works very well to pinpoint engine noiseses.

 

[JohnnyC]

Well, it wasn't carbom build up. It's being towed to my uncles shop today. We'll see what happens.

 

[gsxtreme1987]

thats the exact same thing i heard in my car today.. and it does exactly what its doin on ur car...

lemme know whats up thanx man

 

[reveal1123]

before you go ripping off your timing belt and tensioner/idler pulley's.. check your crank pulley. Make sure the inner rubber ring isnt deteriorating. I had this problem and someone told me that i threw a balance shaft bearing and someone else said my crank was walking. Check all the little things before you jump to conclusions.

btw my crank pulley sounded like a loud knocking noise like metal against metal. It increases as the rpm's increase.

 

[timstsi]

If you only hear the noise when you press in the clutch, it's possilbe that you have a bad throw out bearing. When's the last time you replaced the clutch and the throw out bearing.

Tim

 

[JohnnyC]

It's in my uncle's hands now, but I'll try to pass along some of your suggestions.

Thanks for the help.

-John

 

[RedRain]

Im going to be getting a timing belt kit with all pulleys, tensioners, waterpump, and belts. Ill let you guys know what happend after the change.

 

[reveal1123]

redrain.. did your timing belt jump any teeth? it kinda sounds like your valves may be hitting the pistons? check your timing marks by aligning your crank pulley to the TDC mark on the timing cover and see if your cam sprcket marks are lined up. I discovered my timing was off after taking it on for a timing belt service and they aligned the marks wrong and gave it back. It sounded just like the tap that your video is making and the shop said it was normal. Lets just say that they didnt get any money.

I took it to a reputable DSM shop and the timing was indeed a few teeth off, and he's completing the work as we speak.

you might want to check this before driving it at all.

 

[RedRain]

Thanks for the advice, I will be checking that out in a couple of minutes.

 

[RedRain]

I just checked my timing marks on the camshaft sprockets. The top dowel pins align while at the top and the timing marks align at 3 oclock on the exhaust sprocket and 9 oclock on the intake sprocket. I went to hear the sound again and it sounds like it is coming from one of the tensioner pulleys, maybe a bearing about to go out like I was told in a past post. Here is a picture of the timing marks:

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[reveal1123]

if your camshaft sprocket marks are aligned and your crankshaft is on the mark, then you can rule that possibility out. I was just giving possibilities of what it could be. At this point i'm not sure what it is. It could be the tensioner pulley bearing on its last limb as you said. You wont know until you replace it.

 

[boostineclipse]

It's in my uncle's hands now, but I'll try to pass along some of your suggestions.

Thanks for the help.

-John

John or Red.. any additional info found out yet? My car actually sounds the exact same way. Doesn't sound like its comming from the bottom end.. yet not exactly from the head/vavletrain either. It does infact sound like its comming from the timing belt area. Let me know what comes up with you guys.. I'm checking my timing and such this weekend with a light and with the lines.. we shall see!

 

[JohnnyC]

Unfortunately no, my uncle was supposed to arrange the towing, and it is still sitting in the driveway at my dad's house :thumbdown . Let you know when it gets fixed, though.

 

[RedRain]

John or Red.. any additional info found out yet? My car actually sounds the exact same way. Doesn't sound like its comming from the bottom end.. yet not exactly from the head/vavletrain either. It does infact sound like its comming from the timing belt area. Let me know what comes up with you guys.. I'm checking my timing and such this weekend with a light and with the lines.. we shall see!

I will let you know by next week since I just ordered my timing belt kit. Ill be replacing it sometime thursday next week. Ill let you guys know by Thursday night or Friday night.

 

[JohnnyC]

Here's what's up:

-Spun Rod Bearing
-Significant Crankshaft Damage
-Significant Rod Damage
-Inside is pretty beat up all together

My uncle thinks it is better to just get a new/rebuilt engine at this point.

Does anyone know where to get good rebuilt engines at good prices?

I'm so mad.....