'86 302 Balance question
 

I realize this FSB balance issues have been asked and answered here
before but I have an additional couple questions.

I recently bought a vehicle which has a '86 5.0L Mustang engine which
vibrated when it ran. I noticed the ring on the harmonic damper was
cocked and thinking that was the problem, I bought a new 50 oz. damper
to replace it with. When I pulled the bad damper off, I noticed it was
a 28 oz model - no wonder the engine vibrated!

In checking with the guy who put together this engine he admitted to
putting on a 1965 damper - a '65 flywheel too! I checked the flywheel
he put on and its an old 160-tooth model. (slap - slap!)

Now for my question - I now have a good damper on the engine now but
as for the flywheel, should it be a neutral balance or a 50 oz.
imbalance? The engine runs pretty vibration free now, so I'm guessing
that I need a neutral balance 'wheel. Is that correct? Does the '65
160-tooth flywheel have neutral balance? Do I need to get that old
flywheel off of there or should it be OK?

Thanks!

Depends on what year the engine (crankshaft) is. The '65 flywheel is a 28oz
imbalance so it too would need to be changed, that is, if it's actually a
later model engine. I would be suspicious because a 28oz flywheel on a 50 oz
crank would still vibrate like hell. As far as I know there is no "neutral
balance" flywheel/flex plate from the factory. It's either 28oz or 50oz
imbalance unless you're running a custom crank. Be sure you figure out what
you're engine is because an out of balance condition would ruin the engine
very quickly. I wouldn't drive it until everything got worked out.

Mark


"Ironradio" > wrote in message
om...
>I realize this FSB balance issues have been asked and answered here
> before but I have an additional couple questions.
>
> I recently bought a vehicle which has a '86 5.0L Mustang engine which
> vibrated when it ran. I noticed the ring on the harmonic damper was
> cocked and thinking that was the problem, I bought a new 50 oz. damper
> to replace it with. When I pulled the bad damper off, I noticed it was
> a 28 oz model - no wonder the engine vibrated!
>
> In checking with the guy who put together this engine he admitted to
> putting on a 1965 damper - a '65 flywheel too! I checked the flywheel
> he put on and its an old 160-tooth model. (slap - slap!)
>
> Now for my question - I now have a good damper on the engine now but
> as for the flywheel, should it be a neutral balance or a 50 oz.
> imbalance? The engine runs pretty vibration free now, so I'm guessing
> that I need a neutral balance 'wheel. Is that correct? Does the '65
> 160-tooth flywheel have neutral balance? Do I need to get that old
> flywheel off of there or should it be OK?
>
> Thanks!

Going on the assumption that its an '86 302 with a 50 oz imbalance, it
now has a 50 oz. imbalanced damper. So is the engine now balanced or
does it also need a 50 oz. imbalanced flywheel for a total of 100 oz.
of external balance? Does just the damper need the 50 oz. imbalance
weight or does the flywheel need one too?

Thanks, Dave

> Does just the damper need the 50 oz. imbalance
>weight or does the flywheel need one too?

Get the 50oz flywheel or flexpate (A/T).
You must have this. No other balance will work.

DC

Early engine use a 28oz imbalance damper and flywheel. later use a 50oz
imbalance damper and flywheel. There's no mixing and matching.


"Deadcarnahans" > wrote in message
...
>> Does just the damper need the 50 oz. imbalance
>>weight or does the flywheel need one too?
>
> Get the 50oz flywheel or flexpate (A/T).
> You must have this. No other balance will work.
>
> DC