DeTomaso Mailing List: May 1997, Message #30
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RE>Oil pressure fluctuations 5/1/97 Shane, Is your oil feed mechanical or electrical???? If the latter, I would = suspect that some sort of voltage fluctuation could be at fault. I experienced this same sort of thing on my trip to LA in my 68 XR7. = Also running Mobil1 15-50W so should be consistent. I would see my gas = gauge, temp, and oil pressure all rise and drop together. These are all = fed off of the same voltage regulator and when it does not work, the = guages are down too. This regulator is little more than a thermal strip that opens and = closes a set of contacts such that you get about 5V at the guages..... = not a great setup but it works. I would think that a DC-DC convertor = would be better 12V-5V, or some sort of diode tree with a voltage drop = across a known value resistor.... So, not sure what Lucas or whomever uses as a regulator, if any at all, = but this is the problem with guages in the Mercury world. Lets see, if you sheared your distributor drive gear roll pin, you = would drop oil pressure too, as well as run like a complete turd... any = truth here?? Steve -------------------------------------- Date: 5/1/97 10:18 To: Steve Liebenow From: Shane F. Ingate All, Just querying the collective wisdom of the group. When I am running at a constant throttle, my oil pressure (1972 model) reads about 53 lb/sq.inch (oil warm, 15/50 Mobil 1, 10qt oil pan). = Occassionally, I see the guage drop to about 40 lb/sq.inch, sometimes 35, fluctuate for = several seconds, then return to 53. It did this for the run between Baker & Las Vegas = (160 miles?), but between Baker and San Diego, there was no change at all! Do others notice such a fluctuation? Should I be worried? What could = cause it? Worn oil pump? Lint on the oil-pump pickup filter screen? Shane Ingate in San Diego ------------------ RFC822 Header Follows ------------------ Received: by unixlink with SMTP;1 May 1997 10:18:08 -0800 Received: from glacier.wise.edt.ericsson.se by eur.ericsson.se = (8.6.12/EUR-Dublin) id KAA19024; Thu, 1 May 1997 10:20:25 -0700 Received: from tvol-gw.wgate.com (majordom@tvol-gw.wgate.com = [204.183.169.1]) by glacier.wise.edt.ericsson.se = (8.7.5/8.7.3/glacier-0.9) with SMTP id TAA05078; Thu, 1 May 1997 19:18:26 = +0200 (MET DST) Received: (from majordom@localhost) by tvol-gw.wgate.com (8.6.12/8.6.12) = id MAA13970 for detomaso-outgoing; Thu, 1 May 1997 12:53:27 -0400 Received: from hj.tvol.com (hj.tvol.com [38.219.83.2]) by = tvol-gw.wgate.com (8.6.12/8.6.12) with ESMTP id MAA13966 for <detomaso@tvo= l-gw.wgate.com>; Thu, 1 May 1997 12:53:17 -0400 Received: from mail1.noc.netcom.net (mail1.noc.netcom.net [204.31.1.150]) = by hj.tvol.com (8.8.3/8.8.3) with ESMTP id MAA16830 for = <detomaso@wgate.com>; Thu, 1 May 1997 12:54:07 -0400 (EDT) Received: from shiseis.com (aussie.shiseis.com [206.216.123.2]) by mail1.noc.netcom.net (8.8.5/8.8.5) with SMTP id JAA10930 for <detomaso@wgate.com>; Thu, 1 May 1997 09:50:11 -0700 (PDT) Received: by shiseis.com (4.1/SMI-4.1-SHM) id AA09260; Thu, 1 May 97 09:54:45 PDT Date: Thu, 1 May 97 09:54:45 PDT From: pantera@shiseis.com (Shane F. Ingate) Message-Id: <9705011654.AA09260@shiseis.com> To: detomaso@wgate.com Subject: Oil pressure fluctuations Sender: owner-detomaso@wgate.com Precedence: bulk Reply-To: pantera@shiseis.com (Shane F. Ingate)