Lotus Elan

Differential fill

PostPost by: Coventrylotus » Wed May 18, 2022 9:27 pm

Drained the differential on a Series 1 Elan. Shop manual says that the refill should be 2.4 US pints. After adding that amount and removing a flexible funnel (through an access hole in the rear bulkhead) I'd say about 1/3 or more ran back out the full hole! Level now has obviously stabilized at the bottom of the fill hole. What's going on? Is the true fill amount closer to 2 US pints? Any clarification is greatly appreciated.
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PostPost by: bitsobrits » Thu May 19, 2022 12:56 am

Well, you can't put in anymore than to the bottom of filler hole. 2.4 pints is probably for a fill of a newly rebuilt diff.
When drained, more than you would think remains in the housing. I find I use just a scosh over a quart on a drain/fill, with the car level on the lift.

Elan S1 1963-Bourne bodied
Elan S3 1967 FHC pre airflow

Elan S1 1964
Elan S3 1966 FHC pre airflow
Elan S3 1967 FHC airflow
Elan S4 1969 FHC
Europa S2 1970
Esprit S2 1979
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PostPost by: Hawksfield » Thu May 19, 2022 11:06 am

On a bench fill after readjustment of preload etc I used 1 litre of oil, although the manual says 1.2 litre. I would not have used 1.2 L without tipping the diff nose down excessively.

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