Mark,
The wrong ratio rocker arm will do what you are describing. You
didn't by any chance get a mismatched rocker arm on it? might take a
look. If it is, it will run about an hour and do the same thing
again....Bobby
> If you all recall, a week ago I reported on the Net that I had a very
> prominent knock in my engine and asked for any comments or suggestions on
> what it could be. To my surprise, I received very few replies to that
> post. Anyway, I started by checking the rod bearings and journals on the
> crank. All was fine there as everything was in spec and the bearings all
> looked good. I checked the thrust play on the crank and it was in spec. As
> a matter of fact, I found no problems with the crank or anything hooked to
> it. I next removed the valve covers and found that a couple of lifters
> were not pumping up so I decided to order a new set and replace them all.
> As I removed the lifters and upon careful inspection, I found that one
> lifter on the number one cylinder bank was scarred pretty bad on the flat
> surface area of the cone where the rod rides in the lifter. This tells me
> that the rod was not seated down in the lifter properly and was riding on
> that flat surface. The scaring was completely around the cone. I also
> found that this rod was warped by three thousandths. After I replaced all
> the lifters and that warped push rod, I test ran the engine again today.
> Happy to say, she now sounds healthy and very smooth. I am getting real
> close to being ready to fly again. I am working on the final paint on my
> left wing now. Once that is finished which should be this week, I will
> install the wing and will be ready to fly. I am looking forward to getting
> back in the air. Once the KR gets in your blood, it is an addiction!!!
>
> Mark Jones (N886MJ)
> Wales, WI USA
> E-mail me at flyk...@wi.rr.com
> Visit my NEW
> KR-2S CorvAIRCRAFT web site at www.flykr2s.com
>
>
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