WTF is this noise? Video inside, need help

[Brok3n_GSX]

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I was driving home from my gs's house the other night. The car was driving fine with the big16g I had put on a couple days before. I was running it on low boost and taking it easy trying to break all the new shit in. that morning i hear a slight tick in the motor, but it was no louder than lifter tick. throughout the day the ticki slowly turned into a loud knock. it gets worse as im driving, next thing i know i hear a loud pop from the motor, so i shut off the engine thinking the timing belt broke. nope it was ok. So i try to drive it home and it keeps dying on me and the tick is really bad. My first thought was that a lifter had collapsed but i replace all 16 and it's still doing it. it idles almost normal, oil pressure is good, doesn't overheatstarts right up still.. anybody know what this could be? i posted a video with sound above of it.

P.S. - the "smoke" you see in the video is just oil burning off of the exhaust manifold. I was running it with the valve cover off at first trying to find the noise.

 

[staticbrainwash]

Almost sounds to me like a BIG pre turbo exhaust leak. But if you just put all that on, maybe thats not the case.

Is everything timed alright? Not skipped a tooth or anything?

 

[MilwaukeeGSX]

Probably a damaged rod bearing, possibly a damaged balance shaft bearing. check your oil levels next time...engine rebuild time

 

[Brok3n_GSX]

Almost sounds to me like a BIG pre turbo exhaust leak. But if you just put all that on, maybe thats not the case.

Is everything timed alright? Not skipped a tooth or anything?

no it's not an exhaust leak. thats a brand new manfiold, urbo. gaskets etc... and it didn't do it the first two days after i put the turbo on.. it's deffinetly coming from the motor. I hadn't cheked timeing.. I guess it's possible it skipped a tooth. I did have an aftermarket dipstick I put it after I broke the head off of the old one putting the new turbo in, anyway the new stick didnt seal very well in the tube and it ended up spraying oil all over my valve cover and timing belt.. is it possible that made it jump a tooth?

 

[Brok3n_GSX]

Probably a damaged rod bearing, possibly a damaged balance shaft bearing. check your oil levels next time...engine rebuild time

oh yea and I tried the "pull one spark plug wire at a time trick" and the knock still didn't go away. I heard if it was a rod that should stop the noise.. is that true?

 

[staticbrainwash]

It may not make it go away, but it might make it quieter. The idea being, that you pull the power out of the cyl, thus releasing the force the rod is extruding on the bearings and crank.

 

[MilwaukeeGSX]

If you really want to know you can just drop the oil pan and check for metal shavings. Although being awd you'd have to do quite a bit of work to do that. You can just drain whatever oil you have and just go from there.

 

[Brok3n_GSX]

It may not make it go away, but it might make it quieter. The idea being, that you pull the power out of the cyl, thus releasing the force the rod is extruding on the bearings and crank.

yea, it din't change the noise at all on any plug

 

[taylork057]

..6bolt swap timeeee... sounds like you busted your motor to me.. that sounds horrible.. i dont think id even start it up any more.

 

[staticbrainwash]

..6bolt swap timeeee... sounds like you busted your motor to me.. that sounds horrible.. i dont think id even start it up any more.

That was profound. Grammar and spelling and punct. do still matter on this site people. I just don't want to see a thread get closed because of it.

 

[Eclipse98_RS]

That was profound. Grammar and spelling and punct. do still matter on this site people. I just don't want to see a thread get closed because of it.

Man that sounded terrible. Kinda sounded like my car when I had 1 of 4 exhaust manifold bolts on, and was missing a few gaskets.
Static if you want to get particular with grammar then you should know that its grammar, spelling, and punctuation. The way you had it was wrong too. If you are going to blast someone for spelling errors make sure yours is okay too?

 

[1gcrazy]

Wow, thank god thats not my motor. I'd shit a whole brick. I'm guessing rod bearing or you broke a rod and the very base of the crank and its floppin around but i'm not too great at diagnosing crazy loud stuff when things arent right in front of me.

 

[94Jettameowpsst]

Thats rod knock. My 90 did the same thing. Check your dipstick in the sunlight, bet it will look like someone dumped glitter in the oil. Not sure why it would get knock since your pressure is good, but im guessing thats the problem.

 

[fast92gsx]

When you checked the timing ... did you pull off the crank pulley? Just wandering, I had a buddy with a similar noise a couple hundred miles after doing a timing belt service. It ended up being the crank pulley. The rubber center was still intact, but barely, and the crank pulley was hitting the frame. If you already pulled the crank pulley to check the timing then you should have noticed this but its something to check before you go pulling the motor for a 6 bolt swap.

 

[Zmann42087]

That sounds like rod knock to me. As mentioned, drain your oil and look for shiny bad stuff.

 

[Brok3n_GSX]

The oil pressure is fine and there is no glitter in the oil. the engine doens't seem to have any kind of miss. I don't know if you can tell in the video but it sounds higher in the motor in person like between the head and block. I also found in the area the noise was coming from I had a lifter that was stuck in the "up" position... would it be possible that the stuck lifter caused that valve to get bent? i replaced that lifter but it still knocks but I was thinking this was because the valve is bent and the piston is tapping it...could that be?

 

[RedTurboEclipse]

My friends gst just started having this noise as well. It starts up fine, it idles fine, no crazy smoke coming from the exhaust, no leaking of any fluids, it idles fine, but it has that loud knock. He has basic mods, stock t25.

I'm looking forward to your diagnostic on the sound so I can forward it to him if he hasnt figured it out himself.

 

[eclipsh]

I'm going to tell you the same thing I tell everyone with engine noise: go get a mechanic's stethoscope. It will help you narrow down the source of the noise.

Oh, and for those complaining about spelling and grammar, the web browser Firefox can automatically check your spelling as you type and is much nicer to use than Explorer

 

[dannyd97gst]

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I was driving home from my gs's house the other night. The car was driving fine with the big16g I had put on a couple days before. I was running it on low boost and taking it easy trying to break all the new shit in. that morning i hear a slight tick in the motor, but it was no louder than lifter tick. throughout the day the ticki slowly turned into a loud knock. it gets worse as im driving, next thing i know i hear a loud pop from the motor, so i shut off the engine thinking the timing belt broke. nope it was ok. So i try to drive it home and it keeps dying on me and the tick is really bad. My first thought was that a lifter had collapsed but i replace all 16 and it's still doing it. it idles almost normal, oil pressure is good, doesn't overheatstarts right up still.. anybody know what this could be? i posted a video with sound above of it.

P.S. - the "smoke" you see in the video is just oil burning off of the exhaust manifold. I was running it with the valve cover off at first trying to find the noise.

Sounds like a very bad wrist pin slap, due to either liquid (gas/water) compression or a twisted or slightly misshaped rod. Run a compression test on all 4 cylinders obviously if my theroy is correct one cylinder will be a hair lower but still high enough to make an explosion. Let me know what you find out. If I am right ask me how I know?

 

[motomattxxx]

Sounds like a thrashing machine. As they say at the county demolition derby "Time has elapsed on car #13.......car #13 shut er down!"

 

[Brok3n_GSX]

ok I checked the car out a little closer and bought an mechanics stethascope and a compression tester. Heres some up to date info.

-No metal in oil
-Oil pressure is fine
-Doesn't overheat
-Starts/idles fine
-Problem isn't getting worse
-Sounds like it's coming from between the block and head
-Compresson is great on cylinders 2-4 but cylinder #1 was less than half of what it should be. (noise also sounds like it's coming from around that cylinder) The needle din't move the first turnover or two and then started to move up.. in the manual for the tester it says this means it has a stuck/bent valve.

Any thoughts anyone? I was thinking I somehow managed to bend a valve on the first cylinder and the noise is the piston tapping the bent/stuck valve.

 

[eclipsh]

That sounds about right. Have fun pulling your head off (the engine I mean.)

On the plus side, this gives you a good excuse to do some porting etc while you are in there.

 

[tkelly27]

I've heard some domestic's lifters sound like that. However, with 1/2 the compression, I don't think it's a lifter That's an easy thing to check though, and you're probably going to be pulling the head anyways....

 

[RedTurboEclipse]

Broken GSX, keep us updated.

 

[ekanddsm]

Just a thought pull the valve cover and see if all valves are resting on the lifters evenly?
If you have a boost gauge, Id check to see if the needle was bouncing around at idle,
Like a burned valve, only bent and not sealing all the way. Or if your mileage is high, you might have a cracked or broken valve spring. But the engine vacuum would tell you if you had that, the needle on the gauge wouldn't be steady.

Those are just some experiences I've had in the past, When my dsm made that sound, the wrist pin wore out in the piston, knocked like crazy, Then while trying to find the diagnos the noise in the driveway, piston went to high in the bore, piston rings got stuck above the block, then the connecting rod pulled out of the piston, with the piston stuck on the top. Needless to say that was the last revolution of that crankshaft, and bent two valves too!

Maybe this will help, maybe it wont, Get a quart of gear oil 80-150 some thick stuff, pour it in and see if it gets any quiter, 5 bucks lets u know if you have oil clearence issues.