[Tigers] Temp Gauge Reading High?

[Donald Antilla]

Your measurements sound similar to what I experienced on my 1966 427 Fairlane several years ago. The sensor is screwed into the aluminum intake manifold and it feeds an under-dash Stewart-Warner gauge.

Mine read consistently 200 to 210 which had me concerned because I had a 180 thermostat.

I then bought  an infrared thermometer and measured at the upper radiator hose; it read about 185 as I recall.

I thought about it and I THINK- but did not try to prove- that the engine heat conducted well from the cylinder heads onto the aluminum intake and thus probably raised the sensed temperature.

 

 

Don Antilla 

Southbury, CT

203-264-8301 Home

203-592-8427 Cell

 

 

From: Tigers <tigers-bounces at autox.team.net> on behalf of Tom Parker via Tigers <tigers at autox.team.net>
Reply-To: Tom Parker <tkparker1941 at gmail.com>
Date: Friday, July 10, 2020 at 3:36 PM
To: Graham Harlowe <gharlowe at comcast.net>
Cc: LIST TIGER <tigers at autox.team.net>
Subject: Re: [Tigers] Temp Gauge Reading High?

 

Graham, Is this a new problem or has it always been like that?

 

Tom Parker - tkparker1941 at gmail..

 

On Fri, Jul 10, 2020 at 3:03 PM gharlowe--- via Tigers <tigers at autox.team.net> wrote:

Listers – 

 

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?   

 

Thanks as always, 

 

Graham Harlowe

B382001466

 

 

 

   

 

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