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- 2003 Mazdaspeed Protege
Man, I don't know... I have bikes too, and his method is exactly how we seat the rings on them. But they are 4-stroke, small displacement, single cylinder motors. I've never heard anyone say that the same method should be used on larger four cylinder motors too.
The up and down method is for the same thing; to seat the rings and valves and I know its safe. But I see the logic in what he says too....
Here's a bit from his article....
Although the examples shown here are motorcycle engines,
these principles apply to all 4 stroke engines:
Street or Race Motorcycles, Cars, Snowmobiles, Airplanes & yes ...
even Lawn Mowers !!
( regardless of brand, cooling type, or number of cylinders. )
Like I said, I've never done it or know anyone that has and torn apart the engine afterwards. I think that would be the only way to tell honestly. I know when I first brought my car home from the dealer I got on it before 500 miles and I have no problems with it now. I wouldn't beat the s*** out of it all the time but I don't think it will hurt it getting on it at all.