[Supras] crankshaft pulley now balance shafts

[Bob]

2.4 Chryslers from the 80's (Mitsubishi) had balance shafts that were on the
end of the oiling circuit.

If the car has any issue with the oiling system the balance shaft would spin
a bearing.  

My brother's caravan had a bad thermostat that caused the car to run rich
thinning the oil.  The balance shaft spun and the engine was rebuilt without
balance shafts.  Never noticed a difference but I also never compared one
with balance shafts to this one without side to side

The 90's GM 4 cylinders had an added on balance shaft in the oil pan that
was trouble enough that they were stocked at the dealership.  I think these
could be removed also but my memory is a little hazy there

Bob



-----Original Message-----
From: supras-bounces at supras.com [mailto:supras-bounces at supras.com] On Behalf
Of Mike Long
Sent: Tuesday, December 18, 2007 11:58 AM
To: Jim Jobe
Cc: supras at supras.com; David Robinson
Subject: Re: [Supras] crankshaft pulley

Not sure about the older 2.2's and 2.5's but the newer ones (2.0 and
2.4) which were used in the Neon and PT Cruisers did have balance
shafts although owners have removed them without much ill effect (at
least nothing reported other than noticeably more vibration). BTW, the
2.4 has been stroked to 2.7.

On Dec 18, 2007 11:41 AM, Jim Jobe <jjobe2 at supratech.org> wrote:
>
> Did they have balance shafts?
>
>
> On Tue, Dec 18, 2007 at 02:57:40AM -0500, David Robinson wrote:
> > >>   There has only been one case I've seen of an engine without a
> > >> vibration damper, a stock '54 Ford V8 with low power output, 239 CID
> > >> only 3.1" stroke, but with substantial overlap between the main and
> > >> crankpin journals.  The next year they had dampers at 272 CID, but
> > >> still
> > >> a pig regarding power output.
> >
> >
> > Every 2.2/2.5l 4 cylinder Chrysler engine made from 1982-1995 (several
> > million in total) came from the factory without any crankshaft dampener.
> > Including both versions of the 16v DOHC turbo variety which made
> > significantly more power/liter than the factory 7M. The 2.5 is a stroked
> > version of the 2.2, which already had a longer stroke than the 7M.
> >
> > Dave Robinson
> >
>
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