Horrible clacking noise help if you know
Jul 7, 2007, 05:56 AM
#1
Horrible clacking noise w/ vid
A couple weekends ago I smashed the driver's front corner into a mustang at Summit Point raceway. I destroyed the wheel, LCA, and axle. The hood and fender are screwed, but my motor seemed just fine. After the accident the car ran fine, I had oil pressure, the temp was fine.
Fast forward, a couple weeks later, it's at my in-law's house and I come over to fire it up and I hear this awful clacking. It sounds like a pre-manifold exhaust leak, very valvey... but It's not the exhaust. It seems to be coming from the intake side of the motor and it really seems to be coming from inside the motor. I am at a loss for what could have damaged the engine so badly with it sitting there for a couple of weeks. I've left the car sitting before.
When I started it, it had normal oil pressure, and there are no puddles, the cooling system perfectly in tact. The only info I can give you guys is that it's been sitting up at a bit of an angle on blocks since the front left is destroyed. I can only think that for some reason the impact dislodged or damaged a lifter and after sitting the oil drained out and now it's stuck? It sounds horrible like there is an exhaust leak in my crankcase, but it idles fine. The vaccuum is a litte low, but I expect that because I know I popped a boost leak a few laps into my heat, which I've thus far been unable to find.
I think I'll check the compression when I can get a tester up here to their house... any other ideas? This sucks... I thought it would just require suspension repair...
mods and everything are on the website if you need to know, including cams.
btw this is not normal lifter tick from the cam install, way way louder.
Last edited by honki24; Jul 8, 2007 at 06:46 AM.
Jul 8, 2007, 06:00 AM
#4
If this noise was not there at impact, you didn't crack any exhaust then is my guess. Are there any hoses/lines in the dammage field you could have pinched causing oil starvation? Could it be the rod-bearings? did you go look at the other side of the car, and check for broken/bent/twisted hoses? Any visual dammage by where the sound is coming from? Did you spray brake cleaner/starting fluid back there, and see if it changes the idle? Can help you find out if it is a leak. Spray a Cold motor, or have an eyebrow pencil handy.
Last edited by smokedmustang; Jul 8, 2007 at 06:02 AM.
Jul 8, 2007, 06:10 AM
#5
Account Disabled
iTrader: (38)
Join Date: Aug 2005
Location: Virginia Beach, Virginia
Posts: 9,319
Likes: 0
Received 1 Like
on
1 Post
all I'm hearing is an exhaust leak... try uploading it to my video site.. the audio/video quality should be better http://dsmvideo.vidiac.com
Jul 8, 2007, 06:27 AM
#6
Thanks mellon, I'll try but the video was taken on a pretty crappy camera, the file is only like 500Kb.
I know, it sounds like an exhaust leak! But I swear it is loudest near the intake manifold inside the head/block! It's driving me nuts!
I'll try checking for leaks w/ starter fluid. Thanks for the thought. I don't think any lines are pinched. At worst I may have a puncture in my intercooler.
I know, it sounds like an exhaust leak! But I swear it is loudest near the intake manifold inside the head/block! It's driving me nuts!
I'll try checking for leaks w/ starter fluid. Thanks for the thought. I don't think any lines are pinched. At worst I may have a puncture in my intercooler.
Last edited by honki24; Jul 8, 2007 at 06:35 AM.
Trending Topics
Jul 8, 2007, 06:55 AM
#9
Jul 8, 2007, 07:05 AM
#10
is the intake bolts broken off? Did you make sure nothing got sheared back where the sound is coming from? I don't think it would be something BROKEN as you didn't have the noise immediatley after impact.
Last edited by smokedmustang; Jul 8, 2007 at 07:55 AM.
Jul 9, 2007, 09:04 AM
#11
I'll check for a sheared intake man. bolt next time I'm up there, thanks. I also thought about it being perhaps a loosened sparkplug? I'll check that next time too. I got a quick ECU+ log of it just before I left so maybe that can help. I swear it acts just like an exhaust leak. One troubling thing was that I pulled the oil cap off while it was idling and air was basically -blowing- out of the hole, pretty forcefully. I cant remember if it always did that... It didnt seem any louder with the cap off though, but I swear it sounds like it's from the block/head on the intake side.
Jul 15, 2007, 06:50 AM
#12
for those of you who would like to help me on my now more ominous looking problem:
log of race where I wrecked: http://filebox.vt.edu/users/utara/Last%20words.ecd
**The last minute or so, where the car is idling is after impact and should be helpful in seeing what my car was doing while it was sitting there just after impact**
Also the mitsulogger log of the same thing: http://filebox.vt.edu/users/utara/Last%20words.csv
Log from the car sitting there, making horrible sound:http://filebox.vt.edu/users/utara/engine%20sound.ecd
Notice that for some reason in the later log, I see boost at idle!!! My sensor may be bad, that's a possibility, but I'd like to theorize in case it isn't bad. Stuck open intake valve? ...I dunno, it disagrees with my boost gauge, and I think they are both mounted to the intake manifold, not the UICP...
BTW: my ecu+ settings: WB: PLX, Boost: GM 3 Bar
ECU+ software can be downloaded here: http://www.ecuplus.com/download.htm
log of race where I wrecked: http://filebox.vt.edu/users/utara/Last%20words.ecd
**The last minute or so, where the car is idling is after impact and should be helpful in seeing what my car was doing while it was sitting there just after impact**
Also the mitsulogger log of the same thing: http://filebox.vt.edu/users/utara/Last%20words.csv
Log from the car sitting there, making horrible sound:http://filebox.vt.edu/users/utara/engine%20sound.ecd
Notice that for some reason in the later log, I see boost at idle!!! My sensor may be bad, that's a possibility, but I'd like to theorize in case it isn't bad. Stuck open intake valve? ...I dunno, it disagrees with my boost gauge, and I think they are both mounted to the intake manifold, not the UICP...
BTW: my ecu+ settings: WB: PLX, Boost: GM 3 Bar
ECU+ software can be downloaded here: http://www.ecuplus.com/download.htm
Jul 22, 2007, 10:30 AM
#15
Nope, no luck yet, seeing as I haven't been able to exactly diagnose anything from here and since I haven't been able to visit the car in a while. I don't know why it would do this, but I think my GM 3bar went out because as I showed you in the video, I'm making vaccuum at idle, but my GM says I'm making ~5lbs... I just have to assume that the sensor is wrong....
I'm gonna check the rockers when I get up to the car next. I still need a LCA for the driver's front to make the car moveable so I'm sorta waiting on one before I make that trip. Thanks for checking in, and let me know if anyone has any more ideas.
I'm gonna check the rockers when I get up to the car next. I still need a LCA for the driver's front to make the car moveable so I'm sorta waiting on one before I make that trip. Thanks for checking in, and let me know if anyone has any more ideas.