Lotus Elan

Trunnion question

PostPost by: seniorchristo » Wed Jun 23, 2021 2:51 pm

Old LH trunnion has some play. When I screw on new trunnion it tightens up for last 1/2” of travel. It will screw on all the way with a little bit of leverage. Seems like this Would be a good thing as once broken in it will be a good fit. Is this correct?
Thanks
Chris :)
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PostPost by: vstibbard » Thu Jun 24, 2021 10:07 am

I'd expect they screw on with uniform load, that fact that's tightening up suggests withe rthread miscue or an issue with the upright.

Is it a Stanpart trunnion? Standpart is in the casting on the side, or an unmarked aftermarket, dodgy in my mind as I've had issues with an unmarked set I received with new uprights, they were very loose and wobbly, the opposite of your issue.

What is the thread like on the forged upright, I've found many have actually rusted or worn through not being adequately lubricated over time.

Cheers

Vaughan
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PostPost by: rgh0 » Thu Jun 24, 2021 10:45 am

Have a close look and make sure the threaded bottom of the upright has not been bent

cheers
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PostPost by: seniorchristo » Thu Jun 24, 2021 11:43 am

The trunnion is a Stanpart unit and the upright looks to be in excellent condition. I would estimate the play in the old trunnion as about .020-.030”. I can barely feel any play at all on the opposite side. I guess a bent threaded portion is possible but I thought maybe a tight initial fit was acceptable.
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PostPost by: Billmack » Thu Jun 24, 2021 12:00 pm

Just a few words about that...Those Things Break.
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