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05-07-2005, 08:12 PM
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#1 |
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Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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help! whats this sound?!?!
http://www.ocbaud.com/pics/clicking.AVI
its coming from the rearengine/flexplate area. i checked the flexplate and torque conveter bolts and none are loose. nothing is hitting and it all LOOKS fine. whats happening? this started yesterday. my oil pressure is just like normal, running really high like always. |
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05-07-2005, 09:15 PM
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#2 |
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Professional Grade
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
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I betcha your flexplate is cracked...
Mine made the exact same noise, and when I took the flexplate off, it was totally broken around the whole way, save an inch wide portion... Another start or two, and my flexplate would have broken clean off and ruined at least something...
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1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap) |
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05-07-2005, 09:19 PM
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#3 |
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Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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its not cracked. I had the flexplate on my old 305 crack and it sounded completely different. I turned the engine at the flexplate while under there and checked with a light and i saw NO cracks anywhere. Its also a touch ass TCI flexplate too thats SFI approved.
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05-08-2005, 01:20 AM
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#4 |
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Registered User
Join Date: Dec 2004
Location: New Lenox, IL
Posts: 442
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I had a metric 200 make that noise and it was a cracked torque converter stator support.
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05-08-2005, 10:39 AM
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#5 |
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In Progress
Join Date: Feb 2005
Location: Kamloops, BC, Canada
Posts: 312
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ya i agree, a cracked flexplate sounds different than that.
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1993 Chevrolet K2500 454 4L80E 1974 GMC 1/2t 2wd Stepside 305 auto *sold* 1985 Ford Mustang GT 5.0 5spd |
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05-08-2005, 11:25 AM
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#6 |
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Registered User
Join Date: Feb 2004
Location: Hodgenville, Ky
Posts: 735
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Does the sound change when the truck is placed in gear? Does it change upon deceleration etc?
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05-08-2005, 11:27 AM
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#7 |
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Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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I don't know, but I have it too.
 Mine does it a little slower, but I probably have a slower idle than you with my stock 305. I thought it was my flexplate, but since I was about to pull the transmission, I wasn't too worried about it. I pulled the flexplate off, and it was perfect. After I put the transmission back in, it didn't make that sound for a week. I thouht it might have been coming from the transmission, and been repaired, but then it came back. It does not really sound like a knock, at least any that I have ever heard. I doesn't really sound like a lifter, either. I hope someone here has some good ideas. Slonaker |
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05-08-2005, 01:02 PM
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#8 | |
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Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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Quote:
same sound, it does speed up when i accelorate and slow down when i decelerate. |
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05-08-2005, 04:23 PM
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#9 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,313
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loose cat converter cover?
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Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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05-08-2005, 04:26 PM
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#10 | |
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Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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Quote:
its in the drivetrain somewhere. either my engine is screwed or my tranny is screwed |
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05-08-2005, 05:09 PM
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#11 |
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Registered User
Join Date: Feb 2004
Location: west texas
Posts: 71
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I've got the same noise. I was told it was piston slap. Readjusted my rocker arms twice and replaced my lifters once because I thought the noise was comming from the top of the engine, but it sounds just as bad from the bottom.
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The way of a fool is right in his own eyes:but he that hearkeneth unto council is wise. Proverbs 12:15 |
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05-08-2005, 05:24 PM
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#12 | |
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Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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Quote:
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05-09-2005, 05:27 PM
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#13 |
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Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
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its the tranny. i unbolted the torque conveter and ran the engine and it made no noise. as soon as i bolted back up the torque conveter, the noise started again.
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05-09-2005, 06:00 PM
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#14 |
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Registered User
Join Date: Oct 2002
Location: Phoenix, Arizona
Posts: 4,703
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Stethoscopes work well for pin pointing noise.
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* AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION * |
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05-09-2005, 09:17 PM
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#15 |
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Registered User
Join Date: Feb 2004
Location: Hodgenville, Ky
Posts: 735
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Bad pump??
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