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Re: [Spridgets] Interference

To: Weslake1330 <weslake1330@gmail.com>, Spridgets <spridgets@autox.team.net>
Subject: Re: [Spridgets] Interference
From: Michael MacLean via Spridgets <spridgets@autox.team.net>
Date: Thu, 5 May 2022 13:45:51 -0700
Delivered-to: mharc@autox.team.net
Delivered-to: spridgets@autox.team.net
References: <6F177C23-CC41-48B2-B885-05479D307101@chartermi.net> <8BC19D46-A79C-47E5-A710-2289D1890016@chartermi.net> <CAMhoh1UVVajAfKRPEnAy46Eb4bH2MCHs8pLWQ9BQVpE_6vTaaQ@mail.gmail.com>
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I don=E2=80=99t suppose having 1.5 rockers helps the situation much either.
Mike M

On Thu, May 5, 2022, 1:41 PM Weslake1330 <weslake1330@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 tim=
e
> 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@autox.team.net> wrote:
>
>> Forgot to add both valves were bent as well.
>>
>> > On May 5, 2022, at 3:01 PM, Rick Fisk <refisk@chartermi.net> wrote:
>> >
>> > =EF=BB=BFYes, the 1275 is an interference engine.  In this photo you c=
an 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@autox.team.net> wrote:
>> >>
>> >> =EF=BB=BF
>> >> 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 th=
e
>> 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, bu=
t
>> 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.  Anyon=
e
>> know if a 1275 would be an interference engine if the belt broke?
>> >> Mike MacLean
>> >> ------------------------
>> >>
>> >> spridgets@autox.team.net
>> >>
>> >> Donate: http://www.team.net/donate.html
>> >> Suggested annual donation: $12.75
>> >>
>> >> Archive: http://www.team.net/pipermail/spridgets
>> http://autox.team.net/archive
>> >>
>> >> Unsubscribe/Manage:
>> http://autox.team.net/mailman/options/spridgets/refisk@chartermi.net
>> ------------------------
>>
>> spridgets@autox.team.net
>>
>> Donate: http://www.team.net/donate.html
>> Suggested annual donation: $12.75
>>
>> Archive: http://www.team.net/pipermail/spridgets
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>>
>

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<div dir=3D"auto">I don=E2=80=99t suppose having 1.5 rockers helps the situ=
ation much either.<div dir=3D"auto">Mike M</div></div><br><div class=3D"gma=
il_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, May 5, 2022, 1:41 P=
M Weslake1330 &lt;<a href=3D"mailto:weslake1330@gmail.com";>weslake1330@gmai=
l.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"lt=
r">I always thought it depended on the cam and rockers whether or not the v=
alves would hit the piston if the belt broke on an A-series.=C2=A0 A long t=
ime ago my dyno guy said for my engine if the belt broke the valves would d=
efinitely hit the piston.=C2=A0 No, I don&#39;t have the full valve lift fi=
gure handy.</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"g=
mail_attr">On Thu, 5 May 2022 at 20:16, Rick Fisk via Spridgets &lt;<a href=
=3D"mailto:spridgets@autox.team.net"; target=3D"_blank" rel=3D"noreferrer">s=
pridgets@autox.team.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_=
quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,=
204);padding-left:1ex">Forgot to add both valves were bent as well.<br>
<br>
&gt; On May 5, 2022, at 3:01 PM, Rick Fisk &lt;<a href=3D"mailto:refisk@cha=
rtermi.net" target=3D"_blank" rel=3D"noreferrer">refisk@chartermi.net</a>&g=
t; wrote:<br>
&gt; <br>
&gt; =EF=BB=BFYes, the 1275 is an interference engine.=C2=A0 In this photo =
you can see where the valves beat the crap out of the top of the piston.=C2=
=A0 The piston broke in half at the wrist pin and the top half of the pisto=
n stayed at the top of the bore.<br>
&gt; <br>
&gt; <br>
&gt; <br>
&gt;&gt; On May 5, 2022, at 2:41 PM, Michael MacLean via Spridgets &lt;<a h=
ref=3D"mailto:spridgets@autox.team.net"; target=3D"_blank" rel=3D"noreferrer=
">spridgets@autox.team.net</a>&gt; wrote:<br>
&gt;&gt; <br>
&gt;&gt; =EF=BB=BF<br>
&gt;&gt; When I rebuilt my 1275 for the Bugeye I converted to belt drive fo=
r timing.=C2=A0 Keeps the timing spot on.=C2=A0 It occurs to me that like o=
ther cars the timing belt has a limited life and must be changed.=C2=A0 To =
be honest the instructions did not say when this should occur as far as I c=
an remember.=C2=A0 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.=C2=A0 To my knowledge, I don&#39;t think so, but I have been proven=
 wrong before.=C2=A0 Anyone know if a 1275 would be an interference engine =
if the belt broke?<br>
&gt;&gt; Mike MacLean<br>
&gt;&gt; ------------------------<br>
&gt;&gt; <br>
&gt;&gt; <a href=3D"mailto:spridgets@autox.team.net"; target=3D"_blank" rel=
=3D"noreferrer">spridgets@autox.team.net</a><br>
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</blockquote></div>
</blockquote></div>

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