[Healeys] Gearbox oil volume

Patrick & Caroline Quinn p_cquinn at tpg.com.au
Tue May 26 05:05:24 MDT 2015


Yes that's true for the BN2 through to BJ8 gearboxes, but not so for the BN1
which does not have a dipstick. The BN1 box has a screw-in plug on the
almost top right hand side and to test the level you have to revert to the
old finger in the hole trick.

I recall many years back after a particularly brisk cross country trip I
stopped to check the gearbox oil level. On unscrewing the plug the hot oil
flowed out under pressure clearly caused by expansion. Unlike the later cars
the BN1 gearbox is sealed.

Hoo Roo

Patrick Quinn
Blue Mountains, Australia

-----Original Message-----
From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Bob
Sent: Tuesday, 26 May 2015 8:04 PM
To: Oudesluys; healeys at autox.team.net
Subject: Re: [Healeys] Gearbox oil volume

The fill "plug" on a big Austin-Healey gearbox is the dip stick hole, on the
top side.  Just use the dip stick to check level.


Bob Haskell
AHCA 3000 Mk I registrar

On 05/26/2015 02:27 AM, Oudesluys wrote:
> Nonsense. Expansion is no issue, you would not even notice it if you 
> could measure the level on a dipstick. Anyway, the variety in the 
> castings will give you more differences in volume than expansion.
> Filling to the level of the filler plug hole is recommended by 
> practically every motor manufacturer of the day. This way it is 
> certain that it is properly filled.
> There is plenty of space filled with air above the filler plug hole if 
> you are worried about expansion. Most of the time the filler plug hole 
> is about halfway up the casting.
> Kees Oudesluijs
> Bob Spidell schreef op 26-5-2015 om 7:21:
>> On the original volume question, I'm not comfortable with filling 
>> 'til it overflows.'  I think you need some head space to allow for 
>> expansion of the oil as it heats up.
>> Thoughts?
>> Bob

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