[Healeys] Overdrive slow to engage when hot

[David Nock]

The pressure should be ok. The problem in most likley one of the  
check balls is not seated correctly of the adjusment of the solenoid  
is not pulling the operating rod high enough.
Look closley at the seat of the check valve on the side of the oil  
pump it may be worn a little to one side. If so you can cut a new  
seat on the pump body.





David Nock
British Car Specialists
Stockton Ca 95205
209-948-8767

www.britishcarspecialists.com
.
.

On Sep 12, 2011, at 12:09 AM, Thomas Willig wrote:

> Gentlemen,
>
>
>
> I am facing the problem that the Overdrive on my BN2 is quite slow to
> engage  when the gearbox is hot. Here are the symptoms /parameters:
>
>
>
> 1.    I am using Penrite 30 gearbox oil -a non detergent oil
>
> 2.    I installed a OD pressure gauge that can be read when driving  
> the
> car.
>
> 3.    Gearbox / Engine cold,  pressure is 490 Psi -Looks perfect to me
>
> 4.    OD engages faultlessly
>
> 5.    Gearbox / Engine warm (Engine Oil 200 F) OD pressure 360 Psi - 
> Too
> low.
>
> 6.    The overdrive needs about 4-5 seconds to engage in other  
> words the
> OD pressure takes that long to reach the 360 Psi again.
>
>
>
> ?  Am I facing a worn oil pump? Any advice what I can/should do.
>
>
>
>
>
> Best regards
>
>
>
>
>
> Thomas Willig
>
> BN2L-230649   01. Feb. 1956
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