Dropping oil pressure can mean one of two things; either there is increased
clearance in the bearings caused by engine wear or wearing of the gears in
the oil pump. I am startled to read you haven't changed oil yet. That
should be the first thing you do.
On Tue, Jul 27, 2010 at 1:08 PM, Hoon Kim <hoonhkim@gmail.com> wrote:
> Just when things are staor rting to come together, something else shows up.
> Such is the nature of our cars.
>
> After successfully (I hope), swapping out for a new larger alternator, I've
> noticed that my oil pressure is now dropping when I'm at idle. This is
> happening after the engine is warm. When I rev the engine or when I'm
> travelling, the pressure returns to normal. I'm pretty sure it is not my
> oil
> gauge since I let it drop until the engine stalled on me. I didn't notice
> any knocking, just as the oil pressure drops, the engine gets rougher. I
> did
> also recently replace the oil filter, but haven't changed the oil. Any
> ideas
> on what it could be?
>
> Is my engine wearing down (I hope not)?
> Do I need a new oil pressure sending unit?
> Do I need a new oil pump?
> Do I need to add more oil or a heavier weight (don't think so)?
>
> Thanks all.
>
> Hoon
> Early '67 1600
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