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Bad Vibration In 94 Gt Convert!!!

  • Thread starter Thread starter MuskRatGT
  • Start date Start date Oct 16, 2005
M

MuskRatGT

New Member
Oct 16, 2005
1
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Oct 16, 2005
#1
  • Oct 16, 2005
  • #1
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

New Member
Feb 5, 2004
3,172
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0
Killeen, Texas
Oct 16, 2005
#2
  • Oct 16, 2005
  • #2
MuskRatGT said:
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!!!
Click to expand...

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

Mustang Master
Apr 6, 2003
6,817
12
79
DFW Texas
Oct 16, 2005
#3
  • Oct 16, 2005
  • #3
CManT1914 said:
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.
Click to expand...

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

New Member
Sep 3, 2005
339
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0
Delray Beach, FL
Oct 16, 2005
#4
  • Oct 16, 2005
  • #4
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

Founding Member
Apr 27, 2002
4,548
41
98
MAINE
Oct 16, 2005
#5
  • Oct 16, 2005
  • #5
Bet you 10-1 its your balancer.
 

BlackVert

15 Year Member
Oct 3, 2003
5,589
9
98
Bethesda, MD
Oct 17, 2005
#6
  • Oct 17, 2005
  • #6
newbie question: what do you look for when deciding if a harmonic balancer is bad or not?
 

CManT1914

New Member
Feb 5, 2004
3,172
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0
Killeen, Texas
Oct 17, 2005
#7
  • Oct 17, 2005
  • #7
BlackVert said:
newbie question: what do you look for when deciding if a harmonic balancer is bad or not?
Click to expand...

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

New Member
Jun 6, 2005
458
0
0
Grand Rapids MI
Oct 17, 2005
#8
  • Oct 17, 2005
  • #8
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

10 Year Member
Feb 15, 2003
961
14
59
Cincinnati, Ohio
Oct 17, 2005
#9
  • Oct 17, 2005
  • #9
Here is another look at a bad one..
 

CManT1914

New Member
Feb 5, 2004
3,172
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0
Killeen, Texas
Oct 17, 2005
#10
  • Oct 17, 2005
  • #10
Pops Fun said:
Here is another look at a bad one..

Click to expand...

Good pic, better than mine.
 

94-302-vert

Active Member
Aug 16, 2004
1,947
2
36
NE CT
Oct 18, 2005
#11
  • Oct 18, 2005
  • #11
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

15 Year Member
Oct 3, 2003
5,589
9
98
Bethesda, MD
Oct 18, 2005
#12
  • Oct 18, 2005
  • #12
Pops Fun said:
Here is another look at a bad one..
Click to expand...
now i get it! thanks.
 

RIO5.0

15 Year Member
Feb 16, 2001
6,892
8
128
N.H.
Oct 20, 2005
#13
  • Oct 20, 2005
  • #13
 

CManT1914

New Member
Feb 5, 2004
3,172
2
0
Killeen, Texas
Oct 20, 2005
#14
  • Oct 20, 2005
  • #14
RIO5.0 said:
Click to expand...

Huh?
 

urban96

bubb rubb says:"woo woooooo"
Founding Member
Sep 24, 2002
3,464
1
69
Syracuse, NY
Oct 20, 2005
#15
  • Oct 20, 2005
  • #15
 

BlackVert

15 Year Member
Oct 3, 2003
5,589
9
98
Bethesda, MD
Oct 21, 2005
#16
  • Oct 21, 2005
  • #16
CManT1914 said:
Huh?
Click to expand...
 

droptopford 5 0

Member
Mar 31, 2005
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0
17
Oct 22, 2005
#17
  • Oct 22, 2005
  • #17
way to go RIO! hahahaha: :Teh-Win:
 
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