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[Healeys] Hi oil pressure - now resolved

Subject: [Healeys] Hi oil pressure - now resolved
From: roggrace at telus.net (Roger Grace)
Date: Wed, 5 Apr 2017 18:49:01 -0700
References: <EB0339FFB60448EF9EC44301FE3FDA65@WINDOWST93OFP9> usbVcqho5Ms6WusbXcCBUN
Thanks to all for great ideas and interest.
Problem now resolved after removing oil pan again .... pains !
Issue was that the new rubber/silicon gasket did not have the small cut out for 
the return oil from the relief valve.
This is not very obvious and even experienced AH people were not aware of this 
hole in the block; the oil escapes in a gap in the gasket between the 2 flanges.
So this oil could not escape back into the pan and hence the pressure built up.
Supplier was most apologetic as evidently this one shipped before making this 
cut out ... grrr !!
What was also confusing was that 80 plus psi pressure only happened when the 
oil was warm (20 mins running) and that is why I didn?t notice it at first.
Fortunately I had taken a pix of the bad rubber one before installing and so 
was able to compare it to a regular cork one that I had.
So for interest here are a few pix of the gaskets and hopefully won?t happen to 
anyone else.
Tkx
rg


From: Michael MacLean 
Sent: Sunday, April 2, 2017 8:24 PM
To: Roger Grace ; Healey List 
Subject: Re: [Healeys] Hi oil pressure

Does not matter the age of the gauge. (rhyme?)  You need to put a calibrated 
gauge inline with the oil pressure gauge.  Only way to tell the true oil 
pressure.
Mike MacLean





On Sunday, April 2, 2017 8:15 PM, Roger Grace <roggrace at telus.net> wrote:




Just started my BJ8 after a long Winter project on OD and other things.
Only engine work done was to change oil pan gasket.
New oil and new filter. VR1 20-50 oil.
When starting from cold oil pressure regulates to around 60 psi. You can see it 
regulating.
As soon as it starts to warm up (about 10 mins running) pressure gets very hi 
and follows RPM to about 100 psi at 2000 RPM. Pressure gauge is almost like a 
tacho !
Today pulled the relief valve (not a trivial task as have oil cooler pipes 
obstructing) and inspected.
Looks OK apart from a few scuffs on the valve; there is a small washer behind 
the spring by PO.
Spring free length is 2.3 ins plus 0.1 for washer
Suspecting the filter, changed it too.
Oil gauge is but 12 months old.
Prior to this oil pressure behaved normally; and this is a recently rebuilt 
engine with about 5k mi
At my wits end and need some ideas please.
rg



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