Good suggestions, Bernd. I've always used Fram (reg) and about twice a
year my lifters clack on startup. The truck sits in the garage for at
least a week between races so this isn't totally unexpected. I figured it
was the drain-back also so I tried a K&N filter which has an anti-drain back
valve. Still did it once last year. (which may be an improvement)
I suspect sometimes no matter what you do they're gonna clack when they feel
like it. Why else would it only happen a couple times a year, every year,
and not necessarily when it's been parked since my last race in Nov. I
fired it up today and all was quiet. Well, not ALL....the exhaust was
loud........but that's a good thing. :)
Ray
http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
> ------------------------------
>
> Date: Thu, 07 Mar 2002 22:39:47 -0600
> From: "Bernd D. Ratsch" <bernd@texas.net>
> Subject: DML: RE: Re: Odd running conditions
>
> While the thicker oil may help cure the problem, 20w50 isn't necessary
> for our engines (unless you've got a lot of miles on it and the bearing
> tolerances are getting worn out and need some thicker oil to help quiet
> down the engine).
>
> snip>
>
> Another possibility: I've run Fram, WIX, Mobil-1, Bosch, and STP oil
> filters on my truck. I had the same problem with the Fram (Regular and
> XP series)and STP oil filters. The filter didn't hold the oil
> (drainback valve related). WIX and Mobil-1 seem to do just fine without
> any lifter clak in the AM.
>
> - - Bernd
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