cooling problems
Posted: Sun Nov 24, 2019 1:26 pm
Late this summer driving short journeys lasting half an hour or so was causing temperature to reach 120c. I suspected the transmitter was at fault and fitted a spare TT6811-1 without success. I was thinking blockage in rad, water pump, seized stat. As I was puzzling the problem I noticed the fuel gauge was slightly rising and falling with engine revs. Finally the light came on voltage stabiliser!, tested same and it was rising from 10 to 12 volts.
Bought a replacement from ebay for ?10.45 which stabilised the voltage at 10V.
I decided after this I would carry out a test to establish the accuracy of my gauge.
Carried out a test of the TT6811 in a pan of raising temp water results below/
Water temperature sender Smiths Type
Temp Centigrade 99 90 85 80 70 50
Resistance ? 53 75 82 98 130 265 Smiths TT6811-1 old spare
Resistance ? 54 71 83 98 130 257 Wipac TT7 New
Test method: rising water temperature on hob
My car gauge test against a temp measurement probe at the Thermostat housing
http://s102.photobucket.com/user/John-H ... uge%20test
Test carried out running engine to record rising temperature
My gauge is not accurate but I now know when it is over heating
Bought a replacement from ebay for ?10.45 which stabilised the voltage at 10V.
I decided after this I would carry out a test to establish the accuracy of my gauge.
Carried out a test of the TT6811 in a pan of raising temp water results below/
Water temperature sender Smiths Type
Temp Centigrade 99 90 85 80 70 50
Resistance ? 53 75 82 98 130 265 Smiths TT6811-1 old spare
Resistance ? 54 71 83 98 130 257 Wipac TT7 New
Test method: rising water temperature on hob
My car gauge test against a temp measurement probe at the Thermostat housing
http://s102.photobucket.com/user/John-H ... uge%20test
Test carried out running engine to record rising temperature
My gauge is not accurate but I now know when it is over heating