[Spridgets] Interference

[Michael MacLean]

I don’t suppose having 1.5 rockers helps the situation much either.
Mike M

On Thu, May 5, 2022, 1:41 PM Weslake1330 <weslake1330 at gmail.com> wrote:

> I always thought it depended on the cam and rockers whether or not the
> valves would hit the piston if the belt broke on an A-series.  A long time
> ago my dyno guy said for my engine if the belt broke the valves would
> definitely hit the piston.  No, I don't have the full valve lift figure
> handy.
>
> On Thu, 5 May 2022 at 20:16, Rick Fisk via Spridgets <
> spridgets at autox.team.net> wrote:
>
>> Forgot to add both valves were bent as well.
>>
>> > On May 5, 2022, at 3:01 PM, Rick Fisk <refisk at chartermi.net> wrote:
>> >
>> > Yes, the 1275 is an interference engine.  In this photo you can see
>> where the valves beat the crap out of the top of the piston.  The piston
>> broke in half at the wrist pin and the top half of the piston stayed at the
>> top of the bore.
>> >
>> >
>> >
>> >> On May 5, 2022, at 2:41 PM, Michael MacLean via Spridgets <
>> spridgets at autox.team.net> wrote:
>> >>
>> >> 
>> >> When I rebuilt my 1275 for the Bugeye I converted to belt drive for
>> timing.  Keeps the timing spot on.  It occurs to me that like other cars
>> the timing belt has a limited life and must be changed.  To be honest the
>> instructions did not say when this should occur as far as I can remember.
>> To be fair, the rebuilt engine has only a little over 3K miles on it, but
>> the question arises about valve interference if the belt breaks.  To my
>> knowledge, I don't think so, but I have been proven wrong before.  Anyone
>> know if a 1275 would be an interference engine if the belt broke?
>> >> Mike MacLean
>> >> ------------------------
>> >>
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>> >>
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>
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