Re: [ihc] Need help on valve clatter

[Dan Nees <cookiedan@xxxxxxxxxxx>]

Tom,
   Lifter clatter on an IH engine? NO WAY! that's impossible!
   My experience in all SV engines has been that most all engines
clatter at start-up, till the pressure builds back up. Also, as I've
been told, that during rebuilds, if you bump the rear cam bearing by
even a 1/16 of an inch you lose pressure to the lifters and get valve
chatter. ALSO, by my own experience, as the oil filter wears out, that
is fills up, when the by-pass valve on the filter kicks in, then you
lose oil pressure and get lifter tapping. This is when I KNOW it is time
for an oil change. Usually I do it once a month, which used to mean
about 1500 miles, now that means 3000+, but; when the oil pressure drops
to 10ish and the lifters tap, then it is time to swing by the parts
store. If you use the proper IH filter, NAPA Gold, whatever that number
is I can never remember, 1954 maybe?, then the oil pressure is higher
and stays up longer.
On Tue, 2004-12-07 at 14:33, Tom Reed wrote:
> I've decided to tear into the engine (345) on the 71 Travelette. I've tried
> synthetic oil, mystery oil and just about everything I could to think of to
> quiet down a noisy valve. Here is the symptoms sometimes on startup it (just
> one) clacks real bad and goes away when the engine warms up. Then there is a
> softer clack that comes and goes during idle (worse) and running (better). 
>  
> The oil pressure is usually good, idles at 1/4 scale and runs at 1/2 scale
> on the factory gauge. But sometimes the gauge drops to zero and the bad
> clack reappears. The drop to zero is not rpm dependent and the other valves
> don't clatter as I expect they would with no oil pressure.
>  
> I've got the valve cover off and while running it seems the noise comes from
> #5 intake, but I'm not sure as the bad clack was not evident while running.
> Valve cover is rather clean, all push rods rotate while running, some better
> then others. Rockers are tight and all valve springs seem to have similar
> tension.
>  
> I'm going to try running it again to see if I can diagnose it with the bad
> clack. Anyone have any good ideas what it might be.
>  
> 
> Tom Reed 
-- 
Dan Nees
cookiedan@domain.elided