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Double knock

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Old Feb 10, 2007 | 12:48 AM
  #1  
hwcoll95's Avatar
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Joined: Mar 2002
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From: middle TENNESSEE
Car: 1989 Iroc rebuild
Engine: 355 carb'd
Transmission: 5spd
Axle/Gears: 3:08 pos for a while
Double knock

only really heard at idle after the car has been driven for a while(good and warm) was thinking loose flywheel bolts,but wouldn't it also be heard when engine cooler?? good oil pressure,per dash gauge,everything else seems fine,and not a spark knock,the knock sensor not picking it up,what do ya'll think I should check next?
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Old Feb 10, 2007 | 08:42 AM
  #2  
ghotachevy's Avatar
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tourqe converter bolts exhaust bolts
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Old Feb 10, 2007 | 09:28 AM
  #3  
SpitotRs305's Avatar
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Joined: Oct 2006
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Car: 91 RS
Engine: 350 vortec
Transmission: T-5
Axle/Gears: not the best not the worst
well lets see he doesnt have a torque converter so thats not it.

does it happen while accelerating or just as you come off the gas or while starting and stoping?
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Old Feb 11, 2007 | 02:10 PM
  #4  
hwcoll95's Avatar
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Senior Member
20 Year Member
iTrader: (6)
 
Joined: Mar 2002
Posts: 587
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From: middle TENNESSEE
Car: 1989 Iroc rebuild
Engine: 355 carb'd
Transmission: 5spd
Axle/Gears: 3:08 pos for a while
first heard it

while in the drive thru line,pulled over to parking spot,and tried to hear it under the car,just sounded like a ticking,but get back in the car and it sounds like a double knocking sound,as you rev it up,the sound kind of goes away as far as hearing it,when first started,you don't hear it at all,just after being driven,and like stop at a redlight or something,funny it seems alot louder inside the car than outside????
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