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

Asa Jay Laughton asajay at asajay.com
Tue May 22 00:17:49 EDT 2012


Ken,

Funny how you mention that.  I may not have -seen- pressure drop off on 
the gauge (because I wasn't looking), but I do seem to recall a couple 
of times when I got the hydraulic lifters chattering.

Young and stupid.... young and stupid.
Asa Jay

Asa Jay Laughton, MSgt, USAFR, Retired
&  Shelley Marie
Spokane, WA
******************************
http://www.racingagainstautism.com
http://www.teampanteraracing.com
http://facebook.com/racingagainstautism


On 5/21/2012 8:56 PM, Ken Green wrote:
> If you had a hydraulic cam I'd guess that you'd hear the valve clicking and see a drop in oil pressure if the pump was sucking air.  I'm not sure when that happens with respect to a spun bearing, but I did experience it, without spinning a bearing, a long time ago.
>   
> Ken
>
> From: Asa Jay Laughton<asajay at asajay.com>
> To: detomaso at realbig.com
> Sent: Monday, May 21, 2012 8:41 PM
> Subject: Re: [DeTomaso] For sale, 351C crank...
>
> Will,
>
> I wholeheartedly go with this supposition.  I was much younger then,
> didn't know what I do today, yadda, yadda, yadda.
>
> This engine had a stock non-baffled pan.  I'm sure I probably ran the
> pan dry a few times.  I was in my 20's, driving a smokin' hot Mach I.  I
> won -every- drag race I ever entered (I have -both- trophies), turned
> girls heads and had a bad ass stereo.  I was on top of the world. 
> (young and stupid, at least I'm past the denial stage, now I can get on
> with the other 11 steps)
>
> :)
>
> I ran it hard, I abused it and I bet it sucked air a few times even if I
> didn't know it.  I -had- started with Synthetics.  I was an Amsoil
> dealer back then (not that I really sold any, just for my own use). 
> Sometime in the early 90's I stopped using it, switching to regular dino
> oil, only the best, only the very latest cutting edge API rated stuff. 
> (oh I can hear the laughs starting already).  And I always ran five
> quarts, that's what made it to the full mark on the dipstick.  Don't
> want to overfill a crankcase now do we?
>
> ... so yea... I'm pretty sure that's what did it.
>
> Yes, that engine outlasted a lot of predictions.  Had I taken care of it
> though, and knew what I do today, it might still be in the car,
> continuing to boost my ego.
>
> Next.... I'll be pulling the cam... when I can get this silly damper off.
>
> Asa Jay
> <I'm so tired of -never- having the right size socket for that stinkin'
> damper bolt, I'm gonna go out and BUY one>
>
> Asa Jay Laughton, MSgt, USAFR, Retired
> &   Shelley Marie
> Spokane, WA
> ******************************
> http://www.racingagainstautism.com
> http://www.teampanteraracing.com
> http://facebook.com/racingagainstautism
>
>
> On 5/21/2012 7:13 PM, Will Kooiman wrote:
>> 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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