Subject: Re: [Healeys] OIL PRESSURE

From: Richard Jim Hockert <[email-masked]>
Date: Mon, 21 Jul 2025 17:07:29 -0500

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">The change in oil pressure is normal.&nbsp;=
<div>1. As others have noted, oil thins as it warms, thus the friction resis=
tance &nbsp;is reduced;</div><div>2. The oil pressure relief valve is additi=
ve to the friction pressure. &nbsp;If you increase the spring pressure in th=
e valve, pressure will increase both at cold start and during warm running c=
onditions;</div><div>3. The pressure crated by the oil pressure relief valve=
 can be increased either by replacing the spring or by shimming under the sp=
ring. You can experiment with different shim thickness - a flat washer will f=
it under the spring;</div><div>4 as the engine internals wear and tolerances=
 increase, oil pressure falls. In a well used engine multi-grade oil is appr=
opriate 30W50 for example.</div><div>5 as long as you are reading 10 pounds p=
er 1000 rpm, you are safe.</div><div>6 If you shim too much so that the reli=
ef valve becomes inoperative, you can blow the filter off=E2=80=A6=E2=80=A6<=
/div><div><div dir=3D"ltr">Best regards,<div>Jim</div></div><div dir=3D"ltr"=
><br><blockquote type=3D"cite">On Jul 21, 2025, at 4:14=E2=80=AFPM, Alan Sei=
grist &lt;[email-masked]&gt; wrote:<br><br></blockquote></div><blockqu=
ote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"ltr">As long as you a=
re around 20 psi it should be okay, but you may want to consider replacing t=
he oil pressure spring.&nbsp; It's a pretty easy replacement and you&nbsp;ca=
n do it in about 5 minutes.<br><br>what oil&nbsp;are you running?&nbsp; You s=
hould be running 20W-50.<div><br></div><div>Alan</div></div><br><div class=3D=
"gmail_quote gmail_quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On=
 Mon, Jul 21, 2025 at 2:33=E2=80=AFPM carl and gerry rubino via Healeys &lt;=
<a href=3D"mailto:[email-masked]">[email-masked]</a>&gt; wro=
te:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0=
.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class=3D"=
msg-7061277751002736412">

<div>COLD START 60 LBS. DRIVEE ACROSS TOWN 50, ON HIGHWAY 60, BACK IN TOWN D=
ROPS TO 20 IN 3RD GEAAR, 30 IN SECOND GEAR,<div><br></div><div>IS THIS S A P=
ROOBLEM?</div><div><br></div><div>NO OIL LEAKS ANYWHERE-DIPO STITICK SAYS "o=
k"</div><div><br></div><div>1957 BN-4</div></div>___________________________=
____________________<br>
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From: Michael Salter <[email-masked]>
Date: Thu, 24 Jul 2025 12:35:55 +0000

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