Lotus Elan

differential oil level

PostPost by: seniorchristo » Sat Feb 22, 2020 8:13 pm

After rebuilding my spare differential, refilling with oil only took only 26 ounces for oil to come out the fill level hole. Lotus states capacity at 2.4 US pints which is approximately 38 1/2 ounces. Any ideas?
Thanks
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PostPost by: pharriso » Sat Feb 22, 2020 11:27 pm

Was it at the correct "horizontal" attitude, or were just the rear wheels in the air? mind you I would expect it to take more if nose down... :roll:
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PostPost by: seniorchristo » Sat Feb 22, 2020 11:50 pm

Hi Phil
I had it level on the workbench when filling with oil. Thanks
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PostPost by: Craven » Sun Feb 23, 2020 12:13 am

Did the same filled on bench, definitely less than stated in workshop manual.
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PostPost by: elanner » Sun Feb 23, 2020 4:02 am

Craven wrote:Did the same filled on bench, definitely less than stated in workshop manual.


+1

The values in the manual for the diff, gearbox and coolant seem to be mere approximations. In the US I assume a quart for both the gearbox and diff. Then, because they haven't overflowed, I rush out to buy another quart only to discover that a mere splash is enough to fill them.

Fortunately they inevitably leak profusely so you get to use the extra eventually! :-)

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PostPost by: oldelanman » Mon Feb 24, 2020 6:58 pm

Looks like Lotus may have used the oil capacity of the diff quoted by Ford .. ignoring the fact that the Lotus housing is somewhat smaller than the Ford axle it came from.


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PostPost by: seniorchristo » Mon Feb 24, 2020 10:51 pm

Oldelanman
Yes, now it makes sense, thanks :)
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