Subject: [Spridgets] 1275 Rod Knock Update

From: Michael MacLean via Spridgets <[email-masked]>
Date: Thu, 4 May 2023 02:14:59 -0700

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Took compression readings of the 1275 engine in my Bugeye as the start of
the rod knock diagnosis.  Not good.  No 1 was 110 psi, No 2  -  90 psi, No
3 - 80 psi and No 4 was 110 psi.  Which means none of them are up to
snuff.  Also found the spark plug wire for number 3 cylinder had fallen out
if the distributor.  I plugged it back in and started the engine.  It idled
smoother, but under acceleration the knock was still there and definitely
coming from the block.  All this with only 3 - 4 thousand miles since the
swap from 948 to 1275.  Next will be the oil in the cylinders and retake
the compression test to see if the low compression is due to the valves.
Might as well figure a head rebuild too.  $$$$$$$$$$$$
Mike MacLean

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<div dir=3D"auto">Took compression readings of the 1275 engine in my Bugeye=
 as the start of the rod knock diagnosis.=C2=A0 Not good.=C2=A0 No 1 was 11=
0 psi, No 2=C2=A0 -=C2=A0 90 psi, No 3 - 80 psi and No 4 was 110 psi.=C2=A0=
 Which means none of them are up to snuff.=C2=A0 Also found the spark plug =
wire for number 3 cylinder had fallen out if the distributor.=C2=A0 I plugg=
ed it back in and started the engine.=C2=A0 It idled smoother, but under ac=
celeration the knock was still there and definitely coming from the block.=
=C2=A0 All this with only 3 - 4 thousand miles since the swap from 948 to 1=
275.=C2=A0 Next will be the oil in the cylinders and retake the compression=
 test to see if the low compression is due to the valves.=C2=A0 Might as we=
ll figure a head rebuild too.=C2=A0 $$$$$$$$$$$$<div dir=3D"auto">Mike MacL=
ean</div></div>

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