<VV> 140 Valve Seats

[James Davis]

Please don't talk about dropped seats in 140 around my four.  They don't 
know they are supposed to have a problem.  The Ultra Van has 44,000 miles 
on a 140 engine with a OT-10 cam and headers. It sees full throttle at 
3,400 rpm for hours on end (1hr 45 minutes without lifting is my 
record).  The air conditioned 61 Rampside has 11,000 miles on its new 
engine with Ray Sedman heads and cam.  The air conditioned 66 Monza runs an 
OT-20 cam and Powerglide.  The champion is the 65 Corsa convert with 
230,000 miles on the engine (304 cam, octane milled pistons.  No dropped 
seats since 1971.  It is in who does the head (imho).
Jim Davis



At 07:47 AM 6/9/2004, you wrote:
>My theory is that 140's drop valve seats becuase they
>are 140's and people buy them becuase they can drive
>them hard and do just that.
>
>If non-140's spent as much time at WOT they would drop
>almost as many seats :)
>
>My theory is based almost no data whatsoever, so I
>don't think it's statistically valid either.
>
>[When I was still a teenager, I owned a '68 GTO. I
>went through three engines in that car. My conclusion
>at the time was that Pontiac 400's were unreliable. I
>have teenagers of my own now so I know the engines
>were fine, it's teenagers that are the problem]
>
>David
>
>--- GYoungwolf@aol.com wrote:
> > Since 140 seats seem to be one of the criteria for
> > it being better or worse
> > than a turbo, I need to add that on every dropped
> > seat engine I have worked on
> > there has been a defective carburetor on the same
> > side, usually a secondary,
> > and usually with bad float or loose inlet seat.
> > While I certainly have not seen
> > enough for this to be statistically valid, it is
> > something I recommend
> > keeping in mind for 140 owners. All that extra fuel
> > being introduced can't be a good
> > thing.
> >
> > The Carbmeister
> >
> > ps. Thanks for the offers on the old AOL - I have
> > one on the way.
> > pps. Wife is improving rapidly and will probably be
> > released from the
> > hospital tomorrow. Thanks for all the nice notes and
> > prayers.
> > <<As for the valve seat problems, I think most
> > people feel that dropped seats
> > are probably due to engines that don't cool
> > properly. If yours is dirty and
> > full of rat's nests or something you shouldn't
> > expect it to run forever>>
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