Lotus Elan

Fitting Starter ring gear

PostPost by: DaveAlmey » Tue Dec 01, 2009 3:06 pm

I thought this was going to be easy, but on reflection most of the restoration job has been an uphill battle for me.

Needed to replace the starter ring gear as it had a chipped tooth and the engine was in rebuild stage anyway so one was obtained from Sue Miller

Everything spotless, flywheel had been in the deep freezer for 10 days and the fan oven is on max (240C) ring gear cooked all afternoon (3 hours) and I was feeling very confident as out popped the flywheel quickly followed by the ring gear and it should just drop on! Wrong, not a hope of it slipping over.

Any experts on the subject any advice.

Thanks

Dave :cry:
Regards

Dave

Yes I know I cant spell, but can weld, spray paint, lay grp and rebuild engines.

69 S4SE DHC
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PostPost by: ppnelan » Tue Dec 01, 2009 4:37 pm

I had the exactly same problem and melted the soles of my shoes after jumping up & down on it to try to get it to fit... :evil:

The solution was to use the oven grill instead of just the oven - the ring gear got hot enough to slip on nicely. This makes sense since it is very easy to burn food using the grill, but not so easy with the oven alone. :idea:

:arrow: Matthew
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PostPost by: DaveAlmey » Tue Dec 01, 2009 5:24 pm

Thanks Mathew,

Will try again, the proof will be in the pudding.

Thanks

Dave
Regards

Dave

Yes I know I cant spell, but can weld, spray paint, lay grp and rebuild engines.

69 S4SE DHC
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PostPost by: david.g.chapman » Tue Dec 01, 2009 7:56 pm

I had one fitted last year. Believe it or not I took the flywheel and ring gear to Dovercourt Ford in Chelmsford and asked them to fit it. They did it for nothing during the day!

When you think about it, the job is so quick it sort of makes sense - a bit of light relief for the mechanics? I have always done well by turning up at the garage with the parts to be worked on and puppy dog eyes! 8)

Anyway, you might be lucky as well if you don't want to DIY. It will only cost you the minimum time unit in labour anyway, even if they charge.

Dave Chapman.
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PostPost by: rgwitherell » Wed Dec 02, 2009 1:30 pm

I heated the ring gear on the grill of a gas barbecue. Lifted it with two pair of tongs and it slipped onto the room temperature flywheel with no problem.. It was so loose it could actually rotated easily for a few seconds until it cooled down. I did not check the temperature but the thermometer never goes above 600F so I doubt it would get over the 1000F required to anneal the ring.
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PostPost by: elans3 » Thu Dec 03, 2009 10:33 pm

Same here, though in the grille part of the oven for about half an hour prior to fitting. Flywheel was in the freezer for a couple of days. It fell straight on, no clouting required, and was tight inside 30 secs. Wife wasn't pleased though........
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PostPost by: peterako » Fri Dec 04, 2009 11:00 am

Ahh....the memories :D
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PostPost by: type36lotus » Wed Dec 09, 2009 12:48 am

I brought mine to a local parts place which also has a machine shop. They heated it with a welding torch and just placed on the flywheel and let it cool. Charged me maybe $10. Well worth it even if they only spent 5 minutes to remove the old one and install the new one.
Mike Geiger
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