[Healeys] SU Needles & OIL ( or lack of )

[Oudesluys]

Problem 1: How do you know the engine is running rich? Is it OK at 
idling (blue on the ColorTune: correct, orange: rich), are the plugs 
black after a long stretch?

Problem 2: What is your oil pressure at say 2500rpm and at idle when the 
engine is really hot after a long high speed run. Is the oil pressure 
slightly dipping when you blip the engine when hot?

If at start up after only one night you can actually hear the bearings 
rumbling/rattling I would suspect worn bearings or, but unlikely, the 
wrong oil (way to thin) if you are lucky.
Other causes can be:
faulty/absent non return valve in the oil filter
small leak in the suction part of the oil pump circuit

Never start a cold engine using the throttle to rev it up immediately 
after firing. Let it idle until you read oil pressure. On my JH car it 
can take over 20 seconds before I have oil pressure.

Kees Oudesluijs


Keith Taylor schreef op 24-6-2015 om 8:36:
> G'Day
>
> Problem 1
>
>  I have a BN2 with Le Mans upgrades ,  1 3/4 carbys with OA6 needles & 
> the car is running very rich,
> I have ordered weaker OA8 needles hoping to sort out this problem . 
> However this car has flat top pistons hence much higher compression .
> Am I going down the right road .
>
> Problem 2
>
> This car left standing overnight ,on startup has a severe bearing 
> rattle , my long time mechanic ( retired, read old ex BMC man)  is of 
> the opinion
> that the spin off filter non-return is failing The oil release valve 
> seems to be in good condition. Startup now is to crank over without 
> starting
>  to get oil pressure up then fire up , Subsequent startups are not a 
> problem
>
> Keith Taylor
> Southern Highlands OZ
>
> BN1
> BN2
>
>
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