> >From: Gernot Vonhoegen <email@example.com>
I had the same thing happening with my TR4. The oil pressure would drop
about 15 psi at about 3,000 rpm. It was caused by a worn oil pressure
relief spring. Apparently the spring coils become detempered with
age/heat. The pressure should be set to 70 psi at 2,000 rpm when the
engine is fully warmed from driving. The spring is available from TRF
and Moss and is only a couple of dollars and can be installed in about
> >Fellow scions,
> >looking at the oil pressure guage I decided that its exhibiting a strange
> >behaviour and I was wondering if anyone has an explanantion for that.
> >oil pressure in itself is fine, but when I accelerate hard, the pressure
> >drops by at least 20 lbft. I personaly would expect exactly the opposite
> >even when taking into account that the bearings are not that new anymore
> >etc. As soon as I stop accelerating, i.e. keep it at whatever speed, the
> >pressure goes up again.