[DeTomaso] For sale, 351C crank...

[Will Kooiman]

I've spun plenty rod bearings.

For me it was a 302 revved to the moon with a stock oil pan.  It would suck
all of the oil out of the pan, suck air, and the bearings would overheat and
spin.  I thought it was the tiny rod bolts (stupid teenager).  302 Fords had
rod bolt specs of 19-24.  Boss 302s were 40-45.  It wasn't until much later
that I realized that I was surely running the pan dry.

I probably spun 5 of them in my youth (Joe Pesci accent).  A couple of times
I caught them with no major damage.  Once I let it go for a month or two.  I
didn't have the money to fix it.  When I pulled it, I had to replace the
crank.

So, my guess is you were pumping air instead of oil.  As long as you supply
a steady stream of oil to the bearings, and assuming nothing else is wrong
like a cracked crank, you shouldn't spin the bearings.

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Chance Dorsey
Sent: Monday, May 21, 2012 8:51 PM
To: Asa Jay Laughton
Cc: detomaso at realbig.com
Subject: Re: [DeTomaso] For sale, 351C crank...

Wow Asa Jay,

That is really ugly!!!  On a positive note, 80k on your first engine
build!!!  I hope I can achieve the same mileage on my new engine.  Mine
isn't my first build; but it is my first non stock build.  Only time will
tell.

So what do you think your plan will be, used crank and back to stock or big
inch stroker?

Thanks,

Chance Dorsey
Austin, TX

On May 21, 2012, at 6:04 PM, Asa Jay Laughton <asajay at asajay.com> wrote:

> ... turned .010 under, now slightly used.
> 
>
http://www.teampanteraracing.com/index.php?option=com_g2bridge&view=gallery&
Itemid=57&g2_itemId=4898
> 
> For those who remember I've had an old 351C on an engine stand in my 
> garage because it was making some rattling noises under slight load...  
> I tore further into it today.  The above link shows you what I found.
> 
> -Now- I know what a spun bearing sounds like.  Lord knows how long it 
> had been that way, but a second one was on it's way as well.  I couldn't 
> tell you why it started, but I can certainly show you the results.  The 
> number 4 rod journal on the crank is now turned -quite- a bit further 
> than it should be, on the thrust side.  The bearings halves are nearly 
> sharp enough to cut meat.  It's ugly.
> 
> The crank may be salvageable but it would definitely need a good turning 
> and it would be way undersize.  Personally I think it's probably shot at 
> this point.
> 
> The rod and cap are also both very worn on the bearing surfaces.  I'm 
> not sure it's salvageable or not.  I imagine it can be, but it would 
> need to be bored oversize.
> 
> This was the very first engine rebuild I ever did.  It was part of my 
> final project in the Automotive Technology degree program I graduated 
> from in 1985.  The engine was in my Mach I and was driven nearly every 
> day until the late 90's.  It had a change of heads from 2V to 4V, with 
> manifold, and a cam change, somewhere in mid-life.  When I finally put 
> her down due to the rattling sound, I figure she had nearly 80,000 miles 
> on her, maybe more.
> 
> I rebuilt a different engine and made the swap in 2001.  That's a whole 
> other story that you can probably read in the archives of this list.  
> After nearly 12 years, I now know what failed.
> 
> Enjoy,
> Asa Jay
> 
> Asa Jay Laughton, MSgt, USAFR, Retired
> &  Shelley Marie
> Spokane, WA
> ******************************
> http://www.racingagainstautism.com
> http://www.teampanteraracing.com
> http://facebook.com/racingagainstautism
> 
> 
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