[Tigers] Don's suggestions : Temp Gauge Reading High

[Donald Antilla]

I suggest you check to see if your engine is well-grounded to the “ground” side of your battery ,and to your gauge.
Perhaps the ground continuity was altered during the engine work.
Also, on my Griffith Series 200 I encountered an odd problem with my fuel gauge not reading correctly.
Peter Bayer (Nisonger Instruments) helped solve it::: I had to assure that I had a solid ground to the case of the fuel gasuge itself.

S|UMMARY: Check all of your ground paths.
Hope this helps.
Don Antilla

From: Tigers <tigers-bounces at autox.team.net> on behalf of gharlowe--- via Tigers <tigers at autox.team.net>
Date: Thursday, August 21, 2025 at 5:48 PM
To: tigers at autox.team.net <tigers at autox.team.net>
Subject: [Tigers] Temp Gauge Reading High

Hey all –

It’s been quiet here so hoping to T-up an easy discussion.

My temp gauge is reading about 25 degrees high.   I noticed it after a shop installed a new clutch, which required the engine to be removed, coolant drained, etc., but nothing that should have affected how the gauge reads.  Running on a cool day, temps were reading around 215-220 degrees.  To ensure I wasn’t actually in danger of overheating, I checked various water-cooled locations with an infrared thermometer.   Highest reading was right at the water neck/thermostat housing (191 deg F).   The fuel gauge is reading accurately.  I understand the under-dash instrument stabilizer can affect both instruments, but in this case, only one gauge is off.  I plan to check the ground to the temp gauge and clean contact points at the engine sending unit and at the gauge.   Any other suggestions?

Thanks and I hope all is well out there!

Graham Harlowe
B382001466
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