[DeTomaso] For sale, 351C crank...
Asa Jay Laughton
asajay at asajay.com
Mon May 21 23:30:21 EDT 2012
My next build will be a stroker, pretty much for certain on that. Too
many good reviews from folks just on this forum, not to mention other
forums. Probably -not- with this engine though.
The block was bored .030 over back in 1985. I've not sonic checked it,
nor checked for taper or cylinder wear yet but it's a good bet I
shouldn't use it since it's been bored once.
The engine was a 1973 (from my first Mustang Fastback). As such, I
believe the crank is indexed differently for emissions. I need someone
to validate that for me and if I can take it out with a properly indexed
timing gear set.
It was suggested I might have the crank turned offset for a stroker kit
using Chevy rods. Can that be done? Is it a good idea? Is it less
expensive to turn this crank than buy one ready made in a kit?
For now, that build is a long way off anyway. Now that the mystery is
solved, I'll probably box up the pieces and shelve it for a while.
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 6:50 PM, Chance Dorsey wrote:
> 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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