88 GTA rhythmic tapping sound.
#1
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88 GTA rhythmic tapping sound.
Have this weird issue with my 88 gta. I bought car with a blown up motor, swapped in a motor that my old auto teacher had, ran it for about 500km before it spun a bearing (shitty rebuild). But before it did, I could hear this rythmic knock/rattle when at 500-1000rpm in gear or park. Pretty easy to hear it in the car, but really hard to hear when out of the car.
I assumed ok, but as probably the **** motor rattling before it kersploded. Swap in another motor (known good running one, got to hear and see it run. Made 0 noise. Came with no accessories. Put my accessories on it, notice same noise is present with this motor. So that leaves the crank pulley itself, not the balancer, because I can see the pulley is bent and it wobbled on the old engine as well as this one, so I picked up one of those. Could the transmission be making the sound? It shifts hard and good. Doesn’t slip at all. But I’m ruling out the engine.
I assumed ok, but as probably the **** motor rattling before it kersploded. Swap in another motor (known good running one, got to hear and see it run. Made 0 noise. Came with no accessories. Put my accessories on it, notice same noise is present with this motor. So that leaves the crank pulley itself, not the balancer, because I can see the pulley is bent and it wobbled on the old engine as well as this one, so I picked up one of those. Could the transmission be making the sound? It shifts hard and good. Doesn’t slip at all. But I’m ruling out the engine.
#2
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Car: 86 Camaro IROC
Engine: 305 TPI
Transmission: stock autom.
Axle/Gears: stock
Re: 88 GTA rhythmic tapping sound.
check transmission mount
the rubber block under it and corresponding Crossmember
if there is anything loose or broken it could be at an specifing resonance vibration gets feed into chassis and these noises are most likely only heard inside the car
also motor mounts
the rubber block under it and corresponding Crossmember
if there is anything loose or broken it could be at an specifing resonance vibration gets feed into chassis and these noises are most likely only heard inside the car
also motor mounts
#3
Junior Member
Thread Starter
Re: 88 GTA rhythmic tapping sound.
check transmission mount
the rubber block under it and corresponding Crossmember
if there is anything loose or broken it could be at an specifing resonance vibration gets feed into chassis and these noises are most likely only heard inside the car
also motor mounts
the rubber block under it and corresponding Crossmember
if there is anything loose or broken it could be at an specifing resonance vibration gets feed into chassis and these noises are most likely only heard inside the car
also motor mounts
#4
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: 88 GTA rhythmic tapping sound.
Easy enough to see if it's coming from the trans.
Unbolt the converter from the flex plate and push it back out of the way, and start up the motor.
Unbolt the converter from the flex plate and push it back out of the way, and start up the motor.
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