shaking at 2000- 3000 rpm

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Jun 22, 2002 | 01:28 PM

mncus11

Thread Starter

Intermediate

Joined: Oct 2001

Posts: 38

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From: phila pa

shaking at 2000- 3000 rpm

i just got my vette running and took it on the road for the first trip since back together. it is strong by the way. however at about 2000-3000 rpm there is an annoying shake. it seems to be coming from the motor not the axles or driveshaft bec it does it when the car is not in gear. does anyone have any idea what it could be ballencer flywheel out of ballence. CRANKSHAFT???? :U that makes me sick. thanks

Jun 22, 2002 | 02:41 PM

Matt Gruber

Race Director

Joined: Oct 2000

Posts: 14,991

Likes: 79

From: central FL, near the beach.

Re: shaking at 2000- 3000 rpm (mncus11)

well, mine did that and half the pistons were in backwards by the previous owner.

you did not post any info about what you have. did you just buy it?

i once lived at 6th & Locust- Independance Place- did not need a car!

Jun 22, 2002 | 08:44 PM

blu73

Racer

Joined: Aug 1999

Posts: 414

Likes: 3

From: Mineral Ridge Ohio

Re: shaking at 2000- 3000 rpm (mncus11)

I once had an out-of-balance fan on a '65 'vette. I would shake the engine in such a way, that it felt like an ignition problem. The shakes would start around 1500 RPM. Just something for you to look at.

Jun 24, 2002 | 01:51 AM

mncus11

Thread Starter

Intermediate

Joined: Oct 2001

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From: phila pa

Re: shaking at 2000- 3000 rpm (mncus11)

i think that the problem is the fan i am going to replace it and see what happens. afriend of mine suggested it.

Jun 24, 2002 | 02:02 AM

Stevo81

Pro

Joined: May 2002

Posts: 726

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From: Petaluma CA

Re: shaking at 2000- 3000 rpm (blu73)

interesting...how did you decide it was the fan? Just by replacing it? :seeya

Jun 26, 2002 | 10:33 PM

blu73

Racer

Joined: Aug 1999

Posts: 414

Likes: 3

From: Mineral Ridge Ohio

Re: shaking at 2000- 3000 rpm (Stevo)

It has been quite a while, but I am pretty sure that I removed the fan, put everything back in place, and ran the engine without the fan for a few moments. The vibration was completely gone. Got a new fan on it, and all was well. Sorry about the delay in getting back to you on this.

Jun 26, 2002 | 10:47 PM

LAvetteman

Safety Car

Joined: Jan 2001

Posts: 4,660

Likes: 3

From: South Central Louisiana

St. Jude Contributor

Re: shaking at 2000- 3000 rpm (blu73)

I have the same problem. Seemed to be worst before I changed my plug wires. Hope we find it one day.

Jun 27, 2002 | 03:29 PM

The Money Pit

Melting Slicks

Joined: Jun 2002

Posts: 2,842

Likes: 99

From: Orrtanna Pa.

Re: shaking at 2000- 3000 rpm (mncus11)

Assumming you've tried revving to the same rpms in neutral with the car stopped,I had the same problem with a TransAm once. I dropped the inspection cover and disconnected the three converter bolts. Problem went away. I unfortunately had to replace the torque converter.By the way,don't be cheap on the converter you install or you WILL be replacing it again.