jjpylp@gmail.com wrote:
> On Jan 19, 2:19 pm, motsco_ <mots...@interbaun.com> wrote:
>> jjp...@gmail.com wrote:
>>> I just took the head off my 1991 Honda Civic and there they were nice
>>> groved pistons.
>>> I was told that Honda does not and have not made a non-interferince
>>> engine well BS i got one right here!
>>> My father also told me that he had replace a head gasket on a old CVCC
>>> and it was a non-interferince engine as well.
>> --------------------
>>
>> The grooves in the tops of the pistons (that look like the dents your
>> valves would make) are not proof that you're looking at a
>> non-interference engine.
>>
>> They allow some of the valves to still be opening (or closing) while the
>> piston is at TDC. Keep in mind there are three other strokes, not just
>> the combustion one.
>>
>> 'Curly'
>
> Ok what else is there to a non-interference engine?
> If the valves cant hit how can they get bent or broke?

-----------------

I didn't say they can't hit. I only said there's room for the valves to
open or close early / late without hitting the top of the piston. This
should convince you that the timing of the cams is of great importance.
If your timing belt is even a couple teeth out of time, you'll be buying
and installing some new hardware.

'Curly'