Subject: [Fot] TR3/4 Timing chains

From: Joe Boruch <[email-masked]>
Date: Tue, 11 Aug 2026 22:14:20 +0000 (UTC)

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Amici, my TR3 engine seized at Lime Rock back in June. =C2=A0Finally got ar=
ound to pulling the engine and tearing it down. =C2=A0Found a broken timing=
 chain along with pieces of the tensioner and that the retaining pin for th=
e tensioner was broken off of the front plate. =C2=A0The chain had many lap=
s on it - I probably should just change it with each refresh, rather than r=
eusing it.
Any suggestions on better chains and tensioners? =C2=A0I see that Moss sell=
s an "uprated" chain for about $70 compared to under $15 for other chains. =
=C2=A0It's worth the $70 if it lasts, but is it really better?
Also need an adjustable cam gear. =C2=A0I had been using one from Cambridge=
 Motorsports that I had for many years. =C2=A0Any suggestions?
I have found broken tensioners in previous tear downs, but they were caught=
 before causing anything worse. =C2=A0Does anyone sell or fabricate and upr=
ated tensioner similar to what MGs use? =C2=A0I see that Racetorations make=
s one for TR5/6s. =C2=A0
Joe(B)
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<html><head></head><body><div class=3D"yahoo-style-wrap" style=3D"font-fami=
ly:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div dir=
=3D"ltr" data-setdir=3D"false">Amici, my TR3 engine seized at Lime Rock bac=
k in June. &nbsp;Finally got around to pulling the engine and tearing it do=
wn. &nbsp;Found a broken timing chain along with pieces of the tensioner an=
d that the retaining pin for the tensioner was broken off of the front plat=
e. &nbsp;The chain had many laps on it - I probably should just change it w=
ith each refresh, rather than reusing it.</div><div dir=3D"ltr" data-setdir=
=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">Any suggestions=
 on better chains and tensioners? &nbsp;I see that Moss sells an "uprated" =
chain for about $70 compared to under $15 for other chains. &nbsp;It's wort=
h the $70 if it lasts, but is it really better?</div><div dir=3D"ltr" data-=
setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">Also need=
 an adjustable cam gear. &nbsp;I had been using one from Cambridge Motorspo=
rts that I had for many years. &nbsp;Any suggestions?</div><div dir=3D"ltr"=
 data-setdir=3D"false"><br></div><div dir=3D"ltr" data-setdir=3D"false">I h=
ave found broken tensioners in previous tear downs, but they were caught be=
fore causing anything worse. &nbsp;Does anyone sell or fabricate and uprate=
d tensioner similar to what MGs use? &nbsp;I see that Racetorations makes o=
ne for TR5/6s. &nbsp;</div><div dir=3D"ltr" data-setdir=3D"false"><br></div=
><div dir=3D"ltr" data-setdir=3D"false">Joe(B)</div></div></body></html>
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_______________________________________________
[email-masked]

http://www.fot-racing.com

Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot

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From: "JS Performance Motoring, LLC" <[email-masked]>
Date: Tue, 11 Aug 2026 18:37:18 -0400

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Joe,
       The Roadster Factory has a higher quality, stock type tensioner for
the TR3/4 (and also  versions for the TR6/GT6/Spitfires).  These have
worked well for me.
https://www.trfbasic.com/shop/p/43404-tensioner

Jason Sukey
JS Performance Motoring, LLC
440.984.7720
[email-masked]
www.jspmparts.com
https://www.facebook.com/JSPerformanceMotoring/

On Tue, Aug 11, 2026 at 6:26=E2=80=AFPM Joe Boruch <[email-masked]> wro=
te:

> Amici, my TR3 engine seized at Lime Rock back in June.  Finally got aroun=
d
> to pulling the engine and tearing it down.  Found a broken timing chain
> along with pieces of the tensioner and that the retaining pin for the
> tensioner was broken off of the front plate.  The chain had many laps on =
it
> - I probably should just change it with each refresh, rather than reusing
> it.
>
> Any suggestions on better chains and tensioners?  I see that Moss sells a=
n
> "uprated" chain for about $70 compared to under $15 for other chains.  It=
's
> worth the $70 if it lasts, but is it really better?
>
> Also need an adjustable cam gear.  I had been using one from Cambridge
> Motorsports that I had for many years.  Any suggestions?
>
> I have found broken tensioners in previous tear downs, but they were
> caught before causing anything worse.  Does anyone sell or fabricate and
> uprated tensioner similar to what MGs use?  I see that Racetorations make=
s
> one for TR5/6s.
> Donate: http://www.team.net/donate.html
> Unsubscribe/Manage <http://www.team.net/pipermail/fotUnsubscribe/Manage>:
> http://autox.team.net/mailman/options/fot/[email-masked]
>
>
>

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<div dir=3D"ltr"><div>Joe,</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0The Roadste=
r Factory has a higher quality, stock type tensioner for the TR3/4 (and als=
o=C2=A0 versions for the TR6/GT6/Spitfires).=C2=A0 These have worked well f=
or me.</div><div><a href=3D"https://www.trfbasic.com/shop/p/43404-tensioner=
">https://www.trfbasic.com/shop/p/43404-tensioner</a></div><div><br></div><=
div><br></div><div><div dir=3D"ltr" class=3D"gmail_signature" data-smartmai=
l=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=
=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div>Jason Sukey</div><div><span=
></span><span></span>JS Performance Motoring, LLC<br></div><div>440.984.772=
0</div><div><a href=3D"mailto:[email-masked]" target=3D"_b=
lank">[email-masked]</a><br></div><div><a href=3D"http://w=
ww.jspmparts.com" target=3D"_blank">www.jspmparts.com</a></div><div><a href=
=3D"https://www.facebook.com/JSPerformanceMotoring/" target=3D"_blank">http=
s://www.facebook.com/JSPerformanceMotoring/</a><br></div></div></div></div>=
</div></div></div></div></div></div><br></div><br><div class=3D"gmail_quote=
 gmail_quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Tue, Aug 1=
1, 2026 at 6:26=E2=80=AFPM Joe Boruch &lt;<a href=3D"mailto:jaboruch@yahoo.=
com">[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);padding-left:1ex"><div><div style=3D"font-family:&quot;Helvetica Neue&=
quot;,Helvetica,Arial,sans-serif;font-size:13px"><div dir=3D"ltr">Amici, my=
 TR3 engine seized at Lime Rock back in June.=C2=A0 Finally got around to p=
ulling the engine and tearing it down.=C2=A0 Found a broken timing chain al=
ong with pieces of the tensioner and that the retaining pin for the tension=
er was broken off of the front plate.=C2=A0 The chain had many laps on it -=
 I probably should just change it with each refresh, rather than reusing it=
.</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Any suggestions on bette=
r chains and tensioners?=C2=A0 I see that Moss sells an &quot;uprated&quot;=
 chain for about $70 compared to under $15 for other chains.=C2=A0 It&#39;s=
 worth the $70 if it lasts, but is it really better?</div><div dir=3D"ltr">=
<br></div><div dir=3D"ltr">Also need an adjustable cam gear.=C2=A0 I had be=
en using one from Cambridge Motorsports that I had for many years.=C2=A0 An=
y suggestions?</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">I have foun=
d broken tensioners in previous tear downs, but they were caught before cau=
sing anything worse.=C2=A0 Does anyone sell or fabricate and uprated tensio=
ner similar to what MGs use?=C2=A0 I see that Racetorations makes one for T=
R5/6s. =C2=A0</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Joe(B)</div>=
</div></div>_______________________________________________<br>
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</blockquote></div>

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