Could the starter pinion be contacting the ring gear?
Bob Kramer
rkramer3@austin.rr.com
> > From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On
> Behalf
> > Of Chuck Arnold
> > Sent: Sunday, March 21, 2004 10:58 AM
> > To: 6pack@autox.team.net; Fot@autox.team.net
> > Subject: Opinions on engine problem
> >
> > Hi, need some insight on what might be going on with my engine
> > Facts:
> > New rebuild, just started
> > New crank [nitritded]
> > +4 forged pistons [new]
> > New rod and crank bearings
> > Deck blocked
> > New cam, lifters and moly push rods
> > External oil feed to number one cylinder. This originates from a 1/2
> NPT
> > fitting hole made where the aluminum plug was just above the oil
filter
> > housing. There is a "T" with one side feeding number one via AN4
line,
> the
> > other side goes via 10AN to an accusump Head is unchanged from last
> rebuild
> > [ported, roller rockers, shaved to 3.3 inches.
> >
> > I started it yesterday for the first time and let it run 5 minutes to
> break
> > in the cam. Seemed to go OK, but was quite noisy [piston slap?]. At
> next
> > start there was an obvious problem that turned out to be two pushrods
> were
> > loose [out of their sockets]. Neither was bent. Both nuts had
loosened
> > allowing the set screw to back off. Fixed that.
> > Today I took it for a drive. Seemed to be OK, ran up to 4K just fine.
> Went
> > up a hill just in case had problems. At about 2 minutes into the run,
a
> > horrible racket came from the engine. [hard to describe, obvious
metal
> on
> > metal that should not have been]. ?Stabbed the clutch, killed the
> engine,
> > tuned around and coated to a parking lot. Rechecked the pushrods.
All
> was
> > fine. Started up again, no horrible racket. Continued on , and, at
> about 2
> > minutes, got the noise again. Shut it off, rechecked, all seemed
fine.
> > Coasted down the hill. Restarted, sounded OK, drove back up the hill,
> same
> > result, 2 minutes, bad noise.
> >
> > So, what can it be? Heat related? The mechanic, when he decked the
> block,
> > said the pistons were not square to the top [uphill to the front] and
> that
> > he had to do some adjusting [not sure to what, wrist pins?] to get
them
> > lined up right.
> >
> > I figure no matter what, the head comes off so I can verify it is not
> valve
> > problems, then probably engine out again. Guess I should pull the oil
> pan
> > and see what I can see by looking at the bottom end.
> >
> > Would appreciate any opinions.
> >
> >
> > Chuck Arnold
> > Technical Manager
> > Oracle Northwest Fulfillment Practice
> > 425 241 0457 [cell]
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