Dave,
if the valve malfunctions, you will see excessive pressure. 75lbs is the
design release pressure for the valve, so it's working ok. It is
surprising that you are seeing 75lbs with a warm engine though.
Ulix
On Sun, 25 Apr 1999, Dave Hiley wrote:
> Hi everybody
>
> Since shortly after my rebuild last summer I had an oil leak at the left
> front of the block. I followed the advice of a number of listers and
> replaced the head gasket and that leak seems to have stopped. Last fall I
> was also having considerable oil coming out of the bell houising so I added
> a PCV valve and it stopped.
>
> However, since I put the head back on yesterday and did some wonderful
> cruising in the sun I have re-developed the bell housing leak. And it's
> not just a little leak either. There was a pool the size of a dinner plate
> on the garage floor this morning.
>
> I am speculating that if the oil pressure relief valve is not functioning
> properly the first symptom may have been the head leak and now it has no
> where else to go so it is going out the back of the block. I noticed today
> that even at full normal operating temperature the oil pressure will
> indicate 75+lb when the engine is under load. It shows 55 at cruise, 20-25
> at idle.
>
> Are there any symptoms of oil pressure relief valve failure or malfunction?
>
> I looked back in the archives and found a reference of using a ball bearing
> instead of the plunger. ??? Any comments?
>
> tia
> dave
> '72 Midget MKIII
>
Ulix __/__,__ ___/__|__
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'67 Sprite '74 X1/9
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