I don't have a lot of help for you on the spring size. We can only hope
that the manufacture had it together on their measurements and part quality.
You may want to shoot an email to Dave Nock if you haven't heard from him
yet.
You may have picked up from the archives that the spring tension can be a
bear when reinstalling. If you don't have the engine out, then an
assistant may be of some help.
Mark
----- Original Message -----
From: "Williams, Allen" <awill@ccs.ua.edu>
To: <healeys@autox.team.net>
Sent: Thursday, May 26, 2011 11:16 PM
Subject: Re: [Healeys] oil pressure relief spring
> Thanks for the reply. I went back and did a search in the archives (which
> I
> should have done before asking the question) so I better understand the
> issue.
> I saw mention of shorter than stock springs, so I gather it's typical of
> that
> product. That's no problem as long as it holds to 60 psi. But, if it has
> lighter compressive force and opens at, say, 40psi. would that not be an
> issue? Conjecture, of course. The bottom line for me is if no one has a
> problem with them, I'm OK with using it.
>
> ________________________________________
> From: healeymanjim@hansencc.net [healeymanjim@hansencc.net]
> Sent: Thursday, May 26, 2011 9:39 PM
> To: Williams, Allen
> Subject: Re: [Healeys] oil pressure relief spring
>
> the pressure relief valve only works when the oil is cold and it opens to
> allow bypass and keeps the pressure at approx 60psi. once the oil gets
> warm
> enough to drop below 60psi the valve closes, never to enter the oil
> pressure
> equation again unless the pressure rises above 60 psi for some obscure
> reason. it is like a thermostat; once open it no effect on termperature
> except to keep the temp from falling below the set value. hjim
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