Lotus Elan

Cylinder hear valve stem seals

PostPost by: gino1 » Thu Sep 06, 2018 1:50 pm

just recently acquired a twin cam cylinder head in Italy and discovered when stripping it down that it had some valve stem seals fitted and that the guides had been reworked to fit them.
The head is race prepared and on 45's.
It obvioulsy worked well and wanted to share this with you to hear if anyone else has used them ?

Gino
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italy
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PostPost by: gjz30075 » Thu Sep 06, 2018 5:04 pm

My head has seals, intake and exhaust.
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PostPost by: types26/36 » Thu Sep 06, 2018 5:07 pm

Yes Gino, I have done it, have a read of this thread.
lotus-twincam-f39/worn-valve-guides-t40171.html
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PostPost by: gus » Fri Sep 07, 2018 12:33 am

the valve guides are so short in the twink most people do not want to remove any length at all to fit a seal

If bronze guides are put in the tight end of normal you don't lose much that way anyway, at least until the whole thing needs doing again anyway
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PostPost by: Famous Frank » Sat Nov 10, 2018 4:49 am

Hello Gino!!!

My last two Twincams have valve seals. My engine machinist is Barry Sales of PHP Race Engines in Wauconda, Illinois. He has been installing them for a number of years on all the Twincams he builds.

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PostPost by: Famous Frank » Sat Nov 10, 2018 4:52 am

My latest twincam on the dyno. 158 hp, 138 lb. ft.
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