Jackshaft bearings renewal

Elan Discussions
1

Hello all
Anyone got any good tricks for removing and replacing the jackshaft bearings? Particularly ideas for how it can be done without the lotus tool that I don’t own.
Cheers
Andy

2

Hi Andy

I havn’t done this job so I can’t say for sure, but I think you’d be asking for trouble without the special tool or at least somthing similar. The problem is likley to be fitting new bearings without damaging them. Of course I’m lucky as I have a lathe and a press so I’d probably make somthing up myself, however, I can’t see any way of replacing these bearings safely without a mandral of some sort.

Andy

3

That’s if you can get them, most sources seem to be out of stock at the moment.

4

Luckily for me Paul Matty Sportscars had some in stock when I phone yesterday, I had started to notice a scarcity in the market though. Also noticed that the ones Burton Power sell seem to have a slit in them presumably to add installation? If all else fails I can see a dremmel moment coming on

Cheers

Andy

5

I always use a suitable socket and a socket extension shaft - no problems
cant remember what size but one is a perfect fit to drive old one out and new ones in

cheers
Rohan

6

Rohan

Good call mate thanks, just need to take a set of callipers with me to the tool shop :smiley:

Cheers

Andy

7

Hi Andy

For your info, the bearings are 1.7" OD and 1 9/16" ID. Just be sure to push then in square when you’re fitting them

Regards
Andy

8

And make sure your oil press holes line up or there will be tears shed! & clean all galleries thoroughly pop out all plugs and make sure no crap hiding in there :smiley: Curly

9

Or cut the back end of the Jackshaft off & push the old rear bearing back in with a bit of “Locktite” & ensure that the oil holes don’t line up to avoid a leakage.
Result: A bit more oil flow to the parts that could need it & 1 less bearing to cause friction or to worry about.

John

10

[quote="D.J.Pelly"Or cut the back end of the Jackshaft off & push the old rear bearing back in John[/quote]
…and dont forget to fit an electric fuel pump.

11

Ooops,

thanks for that Brian.
My Twinks were in race cars. I’d forgotten that the pump excenter was on the back end of the Jackshaft.

Cheers
John :blush: :blush:

12

Its the way to go & machine off unwanted loabes, slightly zippier efect, fit fuel pump & inertia switch too, can be used as efective anti-theft (have new pump & fittings if you want one now not using as going FI route) have fun Curly :laughing:

13

For reference a Draper 30mm deep impact socket is 1.7" in diameter and has just been used to tap out the old jackshafgt bearings without any damaged in under a minute each
Andy

14

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