[Healeys] Hi oil pressure - now resolved

[Roger Grace]

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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