Bad Vibration In 94 Gt Convert!!!

[MuskRatGT]

I am getting a bad vibration from the engine in my gt...i replaced the worn motor and tranny mounts...but the vibration is worse now due to the stiffer mounts.....i was told by an "expert" that i have a worn out cam....but i dont hear any cam noise....compression checks good, and i just put new plugs,wires, cap, rotor on. harmonic balancer seems to have very little run out..........HELP GUYS, ANY IDEAS???

Engine does not miss or anything...but vibrates badly at idle,(it shakes the entire car).....when driving it seems to vibrate less, except when you are comming to a stop and the engine rpm drops to around 1000 rpm then it vibrates badly again..PLEASE HELP....I NEED TO KNOW QUICKLY IF I SHOULD BUY A LONGBLOCK OR IF IT MAY BE A SIMPLY SOMETHING STUPID THAT CAN BE REPLACED.....ANYONE HAVE A GOOD USED 302 FROM 94-95...OR KNOW WHERE I CAN GET A GOOD LONGBLOCK?....THANX IN ADVANCE!!!

 

[CManT1914]

PLEASE HELP....I NEED TO KNOW QUICKLY IF I SHOULD BUY A LONGBLOCK OR IF IT MAY BE A SIMPLY SOMETHING STUPID THAT CAN BE REPLACED.....ANYONE HAVE A GOOD USED 302 FROM 94-95...OR KNOW WHERE I CAN GET A GOOD LONGBLOCK?....THANX IN ADVANCE!!!

PULL YOUR BALANCER OFF AND LOOK AT IT CLOSER!! I bet anything it's on it's way out and you just don't know it. Mine looked okay from what I could tell while it was on the car, but when I replaced it, I looked closer and it was on it's way out.

 

[final5-0]

PULL YOUR BALANCER OFF AND LOOK AT IT CLOSER!! I bet anything it's on it's way out and you just don't know it. Mine looked okay from what I could tell while it was on the car, but when I replaced it, I looked closer and it was on it's way out.

I agree, check it out really good.

If you're not gonna go with a pretty serious combo and turn 6k rpm or better then a non sfi replacement will do just fine

If your gonna go in the other direction with your combo just go for a sfi unit and be done with it the first time around.

I just saw ...... this is your first post ...... Welcome Noobie !!!

Grady

 

[95COBRA241]

I concur with the above two posts. I have also read that people experience a lot more vibration with the urethane motor & tranny mounts than with stock replacements.

 

[Venom351R]

Bet you 10-1 its your balancer.

 

[BlackVert]

newbie question: what do you look for when deciding if a harmonic balancer is bad or not?

 

[CManT1914]

newbie question: what do you look for when deciding if a harmonic balancer is bad or not?

The rubber isolator between the two rings, that should be squeezing out if it's going bad. Kinda like this:

Although mine wasn't real bad.

 

[FORCED2DV8]

Most likely its the balancer, like veryone else stated, I replaced mine with a factory unit, and 4 months later it was bad again, I recommend buying a sfi one with no rubber damper style, its more money buts it worth not having the headache.

 

[Pops Fun]

Here is another look at a bad one..

 

[CManT1914]

Here is another look at a bad one..

Good pic, better than mine.

 

[94-302-vert]

If you are planning to keep the car for a while it may be better to jsut replace the balancer anyway. I had no symptoms with my car but I changed the balacer when I had the $$ and I was doing the WP anyway and mine was on it's way out...

Also my buds balancer spun but the rubber never came out either.... how wierd is that...

 

[BlackVert]

Here is another look at a bad one..

now i get it! thanks.

 

[RIO5.0]

 

[CManT1914]

Huh?

 

[urban96]

 

[BlackVert]

Huh?

 

[droptopford 5 0]

way to go RIO! hahahaha: :Teh-Win: