Re: [Healeys] Resonance at 2900 rpm

[Michael Salter via Healeys <healeys@autox.team.net>]

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"Yes on engine".
Well to be honest that opens a whole can of worms.
Engine balance would certainly be the first suspicion and that involves a
total rebuild.
Sometimes an exhaust system can develop a "resonance " which if caused by a
muffler will usually result in it cracking eventually.
I've encountered various other sources  ...
Badly balanced and mounted alternator.
Disintegrating front balancer
 & Loose flywheel
Come to mind.

Time for some diagnosis.

M


On Sun., May 2, 2021, 6:38 p.m. i erbs, <eyera3000@gmail.com> wrote:

> Yes on engine.
> Yes to switching flywheel to BJ8 and special disk for toyota
>
> Ira Erbs
> 1959 AH 100-6
> 1967 MGB
> Milwaukie, OR
>
> On Sun, May 2, 2021, 11:18 AM Bob Spidell <bspidell@comcast.net> wrote:
>
>> Did you have your engine balanced at rebuild? If you did, have you
>> changed out the clutch or flywheel since?
>>
>> On 5/2/2021 11:01 AM, i erbs via Healeys wrote:
>> > Howdy all,
>> > Been driving my car a lot lately and I've been reminded that I get
>> > some load resonance between 2800 and 2900 rpm, in any gear. Have
>> > Smitty 5 speed.
>> > Any ideas?
>> >
>> > Ira Erbs
>> > 1959 AH 100-6
>> > 1967 MGB
>> > Milwaukie, OR
>> >
>>
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<div dir=3D"auto"><span style=3D"font-family:sans-serif;font-size:12.8px">&=
quot;Yes on engine&quot;.</span><div dir=3D"auto"><span style=3D"font-famil=
y:sans-serif;font-size:12.8px">Well to be honest that opens a whole can of =
worms.=C2=A0</span></div><div dir=3D"auto"><span style=3D"font-family:sans-=
serif;font-size:12.8px">Engine balance would certainly be the first suspici=
on and that involves a total rebuild.</span></div><div dir=3D"auto"><span s=
tyle=3D"font-family:sans-serif;font-size:12.8px">Sometimes an exhaust syste=
m can develop a &quot;resonance &quot; which if caused by a muffler will us=
ually result in it cracking eventually.=C2=A0</span></div><div dir=3D"auto"=
><span style=3D"font-family:sans-serif;font-size:12.8px">I&#39;ve encounter=
ed various other sources=C2=A0 ...=C2=A0</span></div><div dir=3D"auto"><spa=
n style=3D"font-family:sans-serif;font-size:12.8px">Badly balanced and moun=
ted alternator.</span></div><div dir=3D"auto"><span style=3D"font-family:sa=
ns-serif;font-size:12.8px">Disintegrating front balancer</span></div><div d=
ir=3D"auto"><span style=3D"font-family:sans-serif;font-size:12.8px">=C2=A0&=
amp; Loose flywheel</span></div><div dir=3D"auto"><span style=3D"font-famil=
y:sans-serif;font-size:12.8px">Come to mind.</span></div><div dir=3D"auto">=
<span style=3D"font-family:sans-serif;font-size:12.8px"><br></span></div><d=
iv dir=3D"auto"><span style=3D"font-family:sans-serif;font-size:12.8px">Tim=
e for some diagnosis.</span></div><div dir=3D"auto"><span style=3D"font-fam=
ily:sans-serif;font-size:12.8px"><br></span></div><div dir=3D"auto"><span s=
tyle=3D"font-family:sans-serif;font-size:12.8px">M</span></div><div dir=3D"=
auto"><span style=3D"font-family:sans-serif;font-size:12.8px"><br></span></=
div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_at=
tr">On Sun., May 2, 2021, 6:38 p.m. i erbs, &lt;<a href=3D"mailto:eyera3000=
@gmail.com">eyera3000@gmail.com</a>&gt; wrote:<br></div><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex"><div dir=3D"auto">Yes on engine.<div dir=3D"auto">Yes to swit=
ching flywheel to BJ8 and special disk for toyota=C2=A0<br><br><div data-sm=
artmail=3D"gmail_signature" dir=3D"auto">Ira Erbs<br>1959 AH 100-6<br>1967 =
MGB<br>Milwaukie, OR</div></div></div><br><div class=3D"gmail_quote"><div d=
ir=3D"ltr" class=3D"gmail_attr">On Sun, May 2, 2021, 11:18 AM Bob Spidell &=
lt;<a href=3D"mailto:bspidell@comcast.net"; target=3D"_blank" rel=3D"norefer=
rer">bspidell@comcast.net</a>&gt; wrote:<br></div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex">Did you have your engine balanced at rebuild? If you did, have you <b=
r>
changed out the clutch or flywheel since?<br>
<br>
On 5/2/2021 11:01 AM, i erbs via Healeys wrote:<br>
&gt; Howdy all,<br>
&gt; Been driving my car a lot lately and I&#39;ve been reminded that I get=
 <br>
&gt; some load resonance between 2800 and 2900 rpm, in any gear. Have <br>
&gt; Smitty 5 speed.<br>
&gt; Any ideas?<br>
&gt;<br>
&gt; Ira Erbs<br>
&gt; 1959 AH 100-6<br>
&gt; 1967 MGB<br>
&gt; Milwaukie, OR<br>
&gt;<br>
<br>
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