[Healeys] Feeling Pressured

[Kees Oudesluijs]

Is that swarf I see on the spring? If so there is a big problem. 
Basically a full rebuild after carefully cleaning out all oil ways and 
passages.

The valve is probably binding.

Kees Oudesluijs



Op 3-5-2018 om 08:08 schreef Corning, Dan (D.C.):
> I’m trying to diagnose why my BT7s oil pressure too high after 
> rebuilding the engine.  With the spark plugs removed, engine cranking 
> oil pressure builds to 90 PSI.  I did install a high capacity oil pump 
> from Healey Surgeons but I don’t think that is the root of the issue.  
> I’ve never started the engine after the rebuild and won’t until I get 
> this resolved.
> Looking through the archives for similar problems led to the 
> possibility the oil pressure relief return port was covered during the 
> rebuild, blocking the return of oil to the sump.  To test this, I 
> pulled the oil pressure relief valve and spring, put the plug back in 
> and cranked the engine.  The cranking oil pressure dropped 
> significantly, low enough that it didn’t register on the gauge.  If 
> I’m correct, that eliminates the return port as the problem because if 
> they WERE plugged, the oil return still would have been blocked and 
> the pressure would have still been high.  I suspect it’s now more 
> likely the pressure relief valve is sticking in the bore or simply too 
> much spring pressure keeping the valve closed.
> I trial fitted the pressure relief valve back in the engine bore and 
> didn’t feel any binding although the valve did have some scoring.  
> Reviewing each component, I noticed the spring fits nicely inside the 
> back side of the pressure relief valve but does not fit INTO the 
> cavity inside the plug.  (see photo) Is it possible I have the wrong 
> plug?  Maybe switched the oil pan plug with the pressure relief plug 
> forcing the spring too far into the pressure relief bore?
> Any ideas that might help me pinpoint the concern?
> Best,
>
> Dan Corning
>
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