[Healeys] Oil pressure gauge response

[Bob Spidell]

FWIW, my BN2 and BJ8 show oil pressure within 3 seconds of a cold start, 
a little longer if I've just changed the oil.  But, I usually have to 
crank them for 5-10 seconds before they fire, and that should get the 
pressure buildup started.

Bob

On 9/1/2016 12:21 AM, Oudesluys wrote:
> Nothing to do with the air in the line to the oil pressure gauge. Air 
> in the line is needed to even out vibrations of the needle due to the 
> small pressure pulses from the oil pump. It is not uncommon that 
> pressure build up is delayed. How and why this happens and why within 
> the same make and type of engine it occurs or not is often unclear.
> On my car (Jensen Healey) I can have pressure from cold (or hot for 
> that matter) practically instantaneous or it can last up to half a 
> minute or more. Most JH's/Lotus 907 engines show this delay and it is 
> the most extreme in any engine I have encountered.
> Always start the engine without revving it. Leave it idling and do not 
> drive away until you have oil pressure.
> It does not seem to harm the engine as on my first JH I did over 
> 160.000mls without any degradation of the oil pressure and/or bearings.
> Kees Oudesluijs
>
> Op 31-8-2016 om 21:47 schreef Stephen Hutchings:
>> Again, thanks to everyone who replied to the BJ8 oil pressure survey- 
>> interesting variety of responses.
>> My oil pressure figures fall well within the acceptable figures, but 
>> what I'm wondering about is the time it takes for the needle on the 
>> gauge to come up.
>>
>> I haven't actually timed this, but mine seems to take an 
>> uncomfortable length of time to come up on a cold start. Could this 
>> just be air in the line delaying the response of the gauge- the 
>> pressure relief valve...ideas?
>> Whenever I change the oil filter it's full, so I don't think it's the 
>> filter filling up. I understand that this is a vague question until 
>> I've actually timed it, but I wondered if anyone else had had the 
>> same concern.
>> Thanks,
>>
>> Stephen, BJ8
>>
>>

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