In a message dated 98-05-03 17:56:30 EDT, ljohnson@HALHINET.ON.CA writes:

> Joel Walker wrote:
>
>  > you may be making the wrong assumption: what if the light and buzzer
>  > came on because of HIGH oil pressure?? there are TWO sensors. if the
>  > cat is plugged, then the exhaust is restricted, so the combustion
>  >gases can't get out that way, so they'd likely blow past the rings (much
>  >more than normal) ... pressurizing the crankcase more than usual. that's
>  >the only thing i can think of. but it should have popped the dipstick off
>  > or blown oil out somewhere.   ??

Except that BOTH oil pressure switches indicate when oil pressure is too LOW.
One is used at low engine speeds and has a lower oil pressure setting and one
is used at higher engine speeds and has a higher pressure setting.  Both
indicate when oil pressure is too LOW though.  I think that perhaps the gases
in the crankcase and lack of proper "breathing" may have heated up the oil and
caused the pressure to drop too low.

Regards,
Jim Davis