Failed MOT Emissions CO2

[derekstre]

Hi Guys

New to forum any help please, recently serviced my Stag before MOT, MK2 1976. Oil and filter change, coolant flush changed thermostat, refilled fresh antifreeze, at the same time I replaced the temperature sender and voltage stabilizer as the fuel gauge was erratic and the temp gauge was only just moving off the stop, on checking the voltage from the stabilizer it was erratic to say the least now stable at 10v fuel gauge stable and temperature gauge now moves off the stop, over to nearly in the red !!! , there seems to be various threads about thermostats and the position in the body.
My question is since replacing the stat the temp gauge is now approaching the red segment after running for maybe 5-10 mins have I put it in wrong or could it be faulty ? would the high running temperature cause the CO2 emissions failure, help please.

Chris thanks for the reply but it HAS failed tested at same garage as last year when it flew through, I still think the problem is associated with the rise in temperatures since I changed the stat ??

Derek

[Chris O]

You seem to have an electrical problem with the temp gauge which others will no doubt advise on. I don't think you need to worry about CO2 emissions at the MOT. At all of the MOT's I've had, they just carry out a visual check and would only fail it if there was considered to be 'excessive smoke.'

Chris

[DJT]

You seem to have an electrical problem with the temp gauge which others will no doubt advise on. I don't think you need to worry about CO2 emissions at the MOT. At all of the MOT's I've had, they just carry out a visual check and would only fail it if there was considered to be 'excessive smoke.'

Chris

Vehicles first used before Aug 75 are sight only. After this date it's the full test, and Derek's Stag is a 76.

[DJT]

Hi Guys

New to forum any help please, recently serviced my Stag before MOT, MK2 1976. Oil and filter change, coolant flush changed thermostat, refilled fresh antifreeze, at the same time I replaced the temperature sender and voltage stabilizer as the fuel gauge was erratic and the temp gauge was only just moving off the stop, on checking the voltage from the stabilizer it was erratic to say the least now stable at 10v fuel gauge stable and temperature gauge now moves off the stop, over to nearly in the red !!! , there seems to be various threads about thermostats and the position in the body.
My question is since replacing the stat the temp gauge is now approaching the red segment after running for maybe 5-10 mins have I put it in wrong or could it be faulty ? would the high running temperature cause the CO2 emissions failure, help please.

Chris thanks for the reply but it HAS failed tested at same garage as last year when it flew through, I still think the problem is associated with the rise in temperatures since I changed the stat ??

Derek

Derek,

Have you fitted the correct thermostat? You need the later type with a foot. Does it have a bleed hole and a 'jiggle pin'? This needs to be fitted at the top to aid bleeding. Have you got all the air out of the system? It can he to raise the near side front, and the heater needs to be in the 'on' position. Where did you get the temperature sender from? There are 'will fit' senders that over read.

http://www.ldparts.co.uk/shop/shop.php?c=viewproduct&pid=74&cat=2&sid=sid8b19953e85f4ac27a56860d6260ea912

http://www.ldparts.co.uk/shop/shop.php?c=viewproduct&pid=191&cat=3&sid=sid8b19953e85f4ac27a56860d6260ea912