Lotus Elan

Valve Shim interchange

PostPost by: Greg Foster » Mon Jul 08, 2019 12:07 am

I am adjusting the valve on a freshly rebuilt engine. After break in and run of around 1,000 miles I torqued the head bolts and checked the valves. Bean recommends .009" for the exhaust and .008" for the intake on a .420 cam.
#4 intake was at .016" so I decided to adjust the valves. The top hat shim is what I found.
20190707_195053.jpg and


I believe the spring retainers and keepers are typical ... Is there any reason I couldn't use a standard shim to replace this one?

Greg
'67 s3 SS
'72 +2 S130
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PostPost by: Greg Foster » Mon Jul 08, 2019 12:47 am

Just read the post

viewtopic.php?t=44423
Will do some more homework and add a photo or more.
Greg
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'72 +2 S130
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PostPost by: Elan45 » Mon Jul 08, 2019 1:48 am

Greg,

I use the top hat and disc shims interchangeably. Why not?

Roger
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PostPost by: 2cams70 » Mon Jul 08, 2019 4:57 am

Greg Foster wrote:Just read the post
Greg


Yes. Whether you can or can't depends on what retainer design you have
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PostPost by: Greg Foster » Tue Jul 09, 2019 2:52 am

I will check it out tomorrow to see if the puck shim will work.
Greg
'67 s3 SS
'72 +2 S130
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Posts: 202
Joined: 26 Oct 2004
Location: Flint Hill, VA USA

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