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Aug 24th, 2023
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Joined: Aug 2013
Posts: 3,383 Likes: 13
Talk Morgan Addict
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Talk Morgan Addict
Joined: Aug 2013
Posts: 3,383 Likes: 13 |
Its down to a thread differential, heat will have no affect on it as the threads don't change with a heat cycle?? If you ever strip one of these rocker arms it all becomes apparent. In certain classes of Motorsport Roller Rockers are banned but other mods allowed so it was fairly common to see a Kent based unit getting up there in the rev range and as others have said never ever seen one come loose. At one stage I had a Mk1 Escort big wing and we were running an Oselli Engineering 1300cc, that pulled 7,500 and 8,000 when I was dropping time, never had a valve issue.
BR Colin
Who used to be a Spanner Juggler
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Joined: Aug 2013
Posts: 3,383 Likes: 13
Talk Morgan Addict
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Talk Morgan Addict
Joined: Aug 2013
Posts: 3,383 Likes: 13 |
Have added a few rocker arm pictures to the Gallery
BR Colin
Who used to be a Spanner Juggler
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Joined: Sep 2014
Posts: 8
New to Talk Morgan
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New to Talk Morgan
Joined: Sep 2014
Posts: 8 |
Does anyone use the "Rule of Nines?" Back in the 60s I used to adjust tappets this way . When #2 valve is fully open , adjust #7.. When #1 is open, adjust #8......and so on as long as the pairs add up to nine. This has always worked for me although it seems like magic ....Terry
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Joined: Apr 2014
Posts: 5,181 Likes: 2
Charter Member
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Charter Member
Joined: Apr 2014
Posts: 5,181 Likes: 2 |
Think it still works on a 4.
.+8 Now gone for a 1800 4/4. Duratec in bright yellow.
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,943 |
Works for Me on My 1963 +4-4Str.
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Seattle
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