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351C 4V problem update

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351C 4V problem update #1
mailbot Mail List Archive Bot ., Online, USA	Oct 23, 2000 09:38 PM Joined 15 years ago 59,279 Posts

This read-only message was archived from a public mail list.
Mail From: Bill Chmelik (email redacted)

Update:
Well, I checked the power valve, was fine, checked valve train motion looks ok,
has a knock now and found a metal shaving in the sump! going to pull it this week,
suspect that I wiped out at least one cam lobe and took out a rod bearing,
Bill

Jay Manley wrote:

> Bill,
>
> You're not going to like my answer, but I have the same engine (72 Mach 1)
> and twice had the same issue. Both times, with LOW miles on a rebuild, I
> had a cam crack. First time, I instantly had a V-6 (last two banks
> died). Last time I had a V-2. Ran rough as a V6, wouldn't do more than
> backfire as a V2. Check the oil breathers/filler to see if you have lifter
> action, but you'll most likely need to pull one/both valve covers.
>
> Jay
>
> At 08:17 PM 10/18/2000 -0700, you wrote:
> >Hi,
> > I'm hoping some one may have some light to shed on a problem. I
> > finally got
> >my 351C 4V CJ running about 10 days ago, it was broken in at 2k RPM for 30 min
> >then the oil was changed, then it has been about 60 miles. Tonight as I was
> >pulling out into traffic, it backfired thru the carb started running rough and
> >won't hold an idle, got it home (about 2 miles) and of course it is too
> >dark to
> >see anything tonight.
> > The motor was bored 30 over, it has keith black pistons, manely
> > valves, comp
> >cam (268 duration, .445 lift), edelbrock intake, holley 750 with vac
> >secondaries, melling HV oil pump, DUI Distributor ( total advance between
> >34 and
> >36 degrees), dynomax headers,
> > Any ideas? a good place to start?
> >Bill Chmelik
> >"was having a good day"
>

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