[Healeys] Overdrive slow to engage when hot

[Thomas Willig]

Thanks to everyone who contributed to solve this problem. The problem
were balls in the control- and check valves. After replacing both of
them, all was well.



Thanks again



Thomas Willig





Von: Thomas Willig
Gesendet: Montag, 12. September 2011 14:38
An: 'Austin Healey'
Cc: Healey List
Betreff: AW: [Healeys] Overdrive slow to engage when hot



..after about 30 seconds after the car stops, the pressure reaches  20
psi



Thomas Willig



Von: Austin Healey [mailto:pajtamuvek at gmail.com]
Gesendet: Montag, 12. September 2011 09:43
An: Thomas Willig
Cc: Healey List
Betreff: Re: [Healeys] Overdrive slow to engage when hot



How fast do You loose the pressure after switching off the engine
hot/cold?



G

2011/9/12 Austin Healey <pajtamuvek at gmail.com>

Maybe worn ball or seating/weakend spring at the valve.



G



2011/9/12 Thomas Willig <twillig at ruda.de>

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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