<div dir="ltr"><div class="gmail_default" style="font-size:small">Both IR thermometers that I have seem to work best when pointed at a black surface. I did an experiment where I painted a spot on a copper hot water pipe black. With the water flowing there was a noticeable difference between the temperature of the black spot, and the shiny copper pipe about an inch away, with the copper reading being lower. </div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">So if you are comparing temperatures, be sure both spots are black, or at least the same color.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small"> Also, despite the red dot one of my IR thermometers projects, the field of view of the IR sensor appears to be actually much wider. Of course, mine were rather cheap($xx), compared to a pricey narrow angle Omega piece ($xxx).</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Stu</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 10, 2020 at 5:31 PM <<a href="mailto:gharlowe@comcast.net" target="_blank">gharlowe@comcast.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang="EN-US"><div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Thanks to Ron and others for the recommendations. Joe Parlanti recommended checking the voltage stabilizer…I hadn’t really observed significant fuel gauge problems, so I didn’t think that was the problem. Out of frustration, I checked under the dash and noticed the sheet metal mounting screw for the stabilizer was loose. I disconnected the battery (a fried wiring harness taught me THAT lesson!), tightened up the mounting screw, and after restarting, the engine temps dropped about 30 degrees at the gauge. I should package and sell that magic screw driver! <u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Seems to be working well now and running between 175 and 195…Thanks again to all, - G.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><div><div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in"><p class="MsoNormal"><b>From:</b> Ron Fraser <<a href="mailto:rfraser@bluefrog.com" target="_blank">rfraser@bluefrog.com</a>> <br><b>Sent:</b> Friday, July 10, 2020 5:07 PM<br><b>To:</b> <a href="mailto:gharlowe@comcast.net" target="_blank">gharlowe@comcast.net</a><br><b>Cc:</b> 'LIST TIGER' <<a href="mailto:tigers@autox.team.net" target="_blank">tigers@autox.team.net</a>><br><b>Subject:</b> RE: [Tigers] Temp Gauge Reading High?<u></u><u></u></p></div></div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Graham<u></u><u></u></p><p class="MsoNormal"> One adage to follow is – if it’s not puking coolant, it’s not overheating.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">You should always double check the temp of the engine to the gauge with an IR thermometer or other means – most gauges are off some.<u></u><u></u></p><p class="MsoNormal">Seems to me I read an article about someone putting a potentiometer or a small resistor in line with the temp gauge to make it read correctly.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">You might want to do a system flush. Make sure you read the Flush bottle directions completely for this.<u></u><u></u></p><p class="MsoNormal">I used Prestone Flush on my 1988 Mustang recently which stated for HD flush run the engine for 3 hours or more which I did by driving a couple hundred miles over 3 days.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">On my Tiger I put an overflow bottle just in front of the header tank. It will keep the coolant with your Tiger and not splashing on your front tire.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I also recommend that you flush and back flush the heater core. The last time I did that all kinds of sediment came out.<u></u><u></u></p><p class="MsoNormal">I need to do that again this year.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Ron Fraser<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><div><div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in"><p class="MsoNormal"><b>From:</b> Tigers <<a href="mailto:tigers-bounces@autox.team.net" target="_blank">tigers-bounces@autox.team.net</a>> <b>On Behalf Of </b><a href="mailto:gharlowe@comcast.net" target="_blank">gharlowe@comcast.net</a><br><b>Sent:</b> Friday, July 10, 2020 3:58 PM<br><b>To:</b> 'Tom Parker' <<a href="mailto:tkparker1941@gmail.com" target="_blank">tkparker1941@gmail.com</a>><br><b>Cc:</b> 'LIST TIGER' <<a href="mailto:tigers@autox.team.net" target="_blank">tigers@autox.team.net</a>><br><b>Subject:</b> Re: [Tigers] Temp Gauge Reading High?<u></u><u></u></p></div></div><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">I should also add that in the interest of cooling, the horn holes are blocked off, I have a thermo-switched pusher fan, undersized fan pulley, aftermarket Derale fan, and an aluminum radiator from Dale A. I’m very familiar with the articles and tech tips available to keep a Tiger cool that our great community has made available. – G.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><u></u> <u></u></p><div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in"><p class="MsoNormal"><b>From:</b> Tom Parker <<a href="mailto:tkparker1941@gmail.com" target="_blank">tkparker1941@gmail.com</a>> <br><b>Sent:</b> Friday, July 10, 2020 3:37 PM<br><b>To:</b> Graham Harlowe <<a href="mailto:gharlowe@comcast.net" target="_blank">gharlowe@comcast.net</a>><br><b>Cc:</b> LIST TIGER <<a href="mailto:tigers@autox.team.net" target="_blank">tigers@autox.team.net</a>><br><b>Subject:</b> Re: [Tigers] Temp Gauge Reading High?<u></u><u></u></p></div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">Graham, Is this a new problem or has it always been like that?<u></u><u></u></p><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">Tom Parker - tkparker1941@gmail..<u></u><u></u></p></div></div><p class="MsoNormal"><u></u> <u></u></p><div><div><p class="MsoNormal">On Fri, Jul 10, 2020 at 3:03 PM gharlowe--- via Tigers <<a href="mailto:tigers@autox.team.net" target="_blank">tigers@autox.team.net</a>> wrote:<u></u><u></u></p></div><blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin:5pt 0in 5pt 4.8pt"><div><div><p class="MsoNormal">Listers – <u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">I’ve been troubleshooting what I thought was a hot-running motor. It’s mid-summer in the mid-Atlantic, and I have a triple-black Tiger, so not the ideal scenario to run cool. The car’s been running between 210 and 220 at 50 mph on level roads. It doesn’t get a lot of miles, so I thought the radiator might need a flush. I changed the thermostat (180deg) at the same time. Same temps. I pulled out an infrared thermometer and with the car idling, the temp gauge was indicating ~ 215 while the infrared thermometer was reading 183 when pointed at the water outlet and F4B manifold. I ordered a new temp sending unit from Rick – any other suggestions? <u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">Thanks as always, <u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal">Graham Harlowe<u></u><u></u></p><p class="MsoNormal">B382001466<u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal" style="margin-left:11.4pt"> <u></u><u></u></p></div></div></blockquote></div><div id="gmail-m_879161887985092596gmail-m_-4437797428698797642DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><p class="MsoNormal"><u></u> <u></u></p><table border="1" cellspacing="5" cellpadding="0" style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(211,212,222)"><tbody><tr><td width="55" style="width:41.25pt;border:none;padding:9.75pt 0.75pt 0.75pt"><p class="MsoNormal"><a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon" target="_blank"><span style="text-decoration:none"><img border="0" width="46" height="29" style="width: 0.4791in; height: 0.3041in;" id="gmail-m_879161887985092596gmail-m_-4437797428698797642_x0000_i1025" src="https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif"></span></a><u></u><u></u></p></td><td width="470" style="width:352.5pt;border:none;padding:9pt 0.75pt 0.75pt"><p class="MsoNormal" style="line-height:13.5pt"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(65,66,78)">Virus-free. </span><a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link" target="_blank"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(68,83,234)">www.avast.com</span></a><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(65,66,78)"> <u></u><u></u></span></p></td></tr></tbody></table><p class="MsoNormal"><u></u> <u></u></p></div></div></div>_______________________________________________<br>
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