Subject: Re: [Spridgets] Interference

From: Kevin Valentine via Spridgets <[email-masked]>
Date: Thu, 5 May 2022 14:58:35 -0400

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Mike,

I'm pretty sure it is considered an interference engine because the valves
could be low enough to contact the top of the piston if the belt were to
break.

If I'm wrong, please let me know ;)

Kevin V.
Tuscarora, Pa

On Thu, May 5, 2022 at 2:41 PM Michael MacLean via Spridgets <
[email-masked]> 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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<div dir=3D"ltr">Mike,<div><br></div><div>I&#39;m pretty sure it is conside=
red an interference engine because the valves could be low enough=C2=A0to c=
ontact the top of the piston if the belt were to break.<div><br></div><div>=
If I&#39;m wrong, please let me know ;)</div><div><br></div><div>Kevin V.</=
div><div>Tuscarora, Pa</div></div></div><br><div class=3D"gmail_quote"><div=
 dir=3D"ltr" class=3D"gmail_attr">On Thu, May 5, 2022 at 2:41 PM Michael Ma=
cLean via Spridgets &lt;<a href=3D"mailto:[email-masked]">spridge=
[email-masked]</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);p=
adding-left:1ex"><div dir=3D"auto">When I rebuilt my 1275 for the Bugeye I =
converted to belt drive for timing.=C2=A0 Keeps the timing spot on.=C2=A0 I=
t occurs to me that like other 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 can 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?<div dir=3D"auto">Mike MacLean<=
/div></div>
------------------------<br>
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</blockquote></div>

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From: Rick Fisk via Spridgets <[email-masked]>
Date: Thu, 5 May 2022 15:01:13 -0400

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Yes, the 1275 is an interference engine.  In this photo you can see where th=
e valves beat the crap out of the top of the piston.  The piston broke in ha=
lf at the wrist pin and the top half of the piston stayed at the top of the b=
ore.

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> On May 5, 2022, at 2:41 PM, Michael MacLean via Spridgets <spridgets@autox=
.team.net> wrote:
>=20
> =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 timin=
g belt has a limited life and must be changed.  To be honest the instruction=
s did not say when this should occur as far as I can remember.  To be fair, t=
he rebuilt engine has only a little over 3K miles on it, but the question ar=
ises about valve interference if the belt breaks.  To my knowledge, I don't t=
hink so, but I have been proven wrong before.  Anyone know if a 1275 would b=
e an interference engine if the belt broke?
>=20
>=20
>=20
> Archive: http://www.team.net/pipermail/spridgets  http://autox.team.net/ar=
chive
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/spridgets/refisk=
@chartermi.net

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