Subject: [TR] TR3a Filter head and oil adapter issue

From: David Templeton <[email-masked]>
Date: Mon, 29 Jun 2026 11:48:18 -0400

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Morning

I rebuilt the engine about two years ago.   I have been living with an oil
leak :-(   For the '3a I have a Mocal adaptor.  This image is off the
website ( https://www.mocal.co.uk/products-spinofffilteradapters.html ) and
is representational because the real one is the outer ring and the specific
inner ring.

Here are my questions :-)

1. It appears to leak between the filter head and the block.  I checked the
flatness of the filter head and made sure it is good.  Do I need to double
the gasket thickness?   It was only a paper one.
2. The other leak is from the adaptor, mainly from the connection of the
outer ring to the filter head.  Yes, the sealing rubber ring is there.

Has anyone had issues with this adaptor?  And solved them?  Did I miss
something stupid with the filter head to the block?

-- 
Regards
David Templeton
Ontario, Canada
1959 TR3a TS54226L
1974 Spitsix FM10491L
1980 TR7 TCT101153UMF

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<div dir=3D"ltr"><div><div class=3D"gmail_default" style=3D"font-family:tah=
oma,sans-serif">Morning=C2=A0</div><div class=3D"gmail_default" style=3D"fo=
nt-family:tahoma,sans-serif"><br></div><div class=3D"gmail_default" style=
=3D"font-family:tahoma,sans-serif">I rebuilt the engine about two years ago=
.=C2=A0 =C2=A0I have been living with=C2=A0an oil leak :-(=C2=A0 =C2=A0For =
the &#39;3a I have a Mocal adaptor.=C2=A0 This image is off the website (=
=C2=A0<a href=3D"https://www.mocal.co.uk/products-spinofffilteradapters.htm=
l">https://www.mocal.co.uk/products-spinofffilteradapters.html</a> ) and is=
 representational because=C2=A0the real one is the outer ring and the speci=
fic inner ring.=C2=A0=C2=A0<br><br><img src=3D"cid:ii_mqzd9r1a0" alt=3D"ima=
ge.png" width=3D"521" height=3D"293"><br></div><div class=3D"gmail_default"=
 style=3D"font-family:tahoma,sans-serif">Here are my questions :-)=C2=A0<br=
><br>1. It appears=C2=A0to leak between the filter head and the block.=C2=
=A0 I checked the flatness of the filter head and made sure it is good.=C2=
=A0 Do I need to double the gasket thickness?=C2=A0 =C2=A0It was only a pap=
er one.=C2=A0 =C2=A0</div><div class=3D"gmail_default" style=3D"font-family=
:tahoma,sans-serif">2. The=C2=A0other leak is from the adaptor, mainly from=
 the connection of the outer ring to the filter head.=C2=A0 Yes, the sealin=
g rubber ring is there.=C2=A0=C2=A0<br><br>Has anyone had issues with this =
adaptor?=C2=A0 And solved them?=C2=A0 Did I miss something stupid with the=
=C2=A0filter head to the block?<br><br><img src=3D"cid:ii_mqze6igm1" alt=3D=
"20260628_183249_small.jpg" width=3D"302" height=3D"530"><br></div><br clea=
r=3D"all"></div><div><br></div><span class=3D"gmail_signature_prefix">-- </=
span><br><div dir=3D"ltr" class=3D"gmail_signature" data-smartmail=3D"gmail=
_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><font face=3D"tahoma, sa=
ns-serif">Regards</font><div><font face=3D"tahoma, sans-serif">David Temple=
ton</font></div><div><font face=3D"tahoma, sans-serif">Ontario, Canada</fon=
t></div><div><font face=3D"tahoma, sans-serif">1959 TR3a=C2=A0TS54226L</fon=
t></div><div><font face=3D"tahoma, sans-serif">1974 Spitsix=C2=A0<span styl=
e=3D"color:rgb(84,84,84)">FM10491L</span></font></div><div><font face=3D"ta=
homa, sans-serif"><span style=3D"color:rgb(84,84,84)">1980 TR7 TCT101153UMF=
</span></font></div></div></div></div></div></div>

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