[Shotimes] Re: help.....valve chatter and rod knock...

[David P]

I am used to driving cars that have NO rod bearing failures, and a much
higher production run, so I still think something is amiss.



David P

95MTX



~
----- Original Message -----
From: "Ron Porter" <ronporter@prodigy.net>
To: <shotimes@autox.team.net>
Sent: Sunday, October 27, 2002 10:52
Subject: RE: [Shotimes] Re: help.....valve chatter and rod knock...


> I disagree, there are NOT that many rod bearing failures. There are many
> cars running around with 200K+ miles on original bearings. FWIW, if
bearings
> wear out over 200K, that sounds like normal maintenance to me......
>
> If someone buys a used SHO with a questionable service history, and it has
> 75K+ miles, I would change the rod bearings. Otherwise, for original-owner
> cars, or well-maintained cars, I wouldn't worry about it.
>
> Ron Porter
>
> -----Original Message-----
> From: shotimes-admin@autox.team.net
> [mailto:shotimes-admin@autox.team.net]On Behalf Of David P
> Sent: Sunday, October 27, 2002 9:51 AM
> To: Erik Balser; shotimes@autox.team.net
> Subject: Re: [Shotimes] Re: help.....valve chatter and rod knock...
>
>
>     Rod bearing replacement should become part of the 60k service, or at
> least by 100k. Main bearings should be done every other 60k, or 150k at
the
> most. Some motors may not need the bearings, but the motor needs the oil
> pressure to maintain other things, like the valvetrain. I replaced my rods
> and mains at 70k and gained 3-11psi depending on the rpm.
>
>     All this talk of rod bearing failures (through the years) has me
> wondering why there are so many. What I am questioning is whether or not
the
> journal places enough pressure on the bearings to keep them seated to a
low
> enough psi to be considered reliable. Maybe for Yamaha's engineers. Most
of
> the stuff Yamaha builds is high maintenance, low duty (racing motors,
> motorcycles, boats, etc...).
>
>
>
> David P
>
> 95MTX
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