MTFC Derek Posted June 30 Share Posted June 30 So, the temp gauge on my 1300 spitfire engined Herald went into the red. Fitted new thermostat. Fitted a new pump. Flushed system. Still in the red. Ran it without thermostat - all OK. Tested thermostat - opening at 82 degrees. Just ran it with thermostat back in - back in the red. I'm flummoxed. Quote Link to comment Share on other sites More sharing options...
glang Posted June 30 Share Posted June 30 Is there a problem with the temperature sender so that it gives an excessive reading for the higher temperature produced by running with a thermostat? 1 Quote Link to comment Share on other sites More sharing options...
Wendy Dawes Posted June 30 Share Posted June 30 Good call, just what I was thinking 👍 1 Quote Link to comment Share on other sites More sharing options...
drofgum Posted July 1 Share Posted July 1 Hi, What does the fuel gauge read? it is possible the voltage stabiliser has stuck on and the gauges are getting 12 V instead of 10 V. Incorrect readings from the temperature sender usually are wrong from first installation of the sender. ISTR the Heralds didn't use a voltage stabiliser, at least early ones, so the gauges and possibly senders would be different to those in a Spitfire. Best of luck, Paul Quote Link to comment Share on other sites More sharing options...
Clive Posted July 1 Share Posted July 1 Does it go to teh red immediately, or slowly build up when running? Any indications (apart from the gauge) that it is overheating? And was this a sudden change in behaviour? A new (correct for the car, not the engine) sensor would probably be my next step. I have had a sensor fail, and the gauge went straight to the red. During a late night 200 mile journey home, which initially caused a panic but once I realised everything else appeared OK, I just ignored it until I got home. Heater temperature gives a bit of an idea. Quote Link to comment Share on other sites More sharing options...
WIMPUS Posted July 1 Share Posted July 1 Get a infrared temp reader from amazon. Very easy to see the temp of thermostat housing, rad hoses etc. Been using this on a few cars with 'overheating' problems. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.