Engine not registering temp on gauge, but boiling hot!

[beaver700]

Gday,

Just came across another issue with my suzuki. I just got the GB back in, and took it for a test drive... the temp was fine to start with, but all of a sudden I noticed the temp reading dropped to about an eighth of the way up instead of a quarter of the way... I then pulled over and there seemed to be plenty of coolant in the reserve tank... about another 2 k's down the road, I noticed that there was coolant on the windscreen...?!!. I got out and checked the level, and the resevior tank had blown the top!... I eventually reached a source of water, let the car cool down, then poored water in the radiator while the engine was running... I could hear violent clicking noises each time water was poured in... (thermostat closing?). Another thing was the heater stopped blowing hot air... I immediately thought 'replace thermostat' (which recently got replaced....). However I took the thermostat out a few days later and it looked fine... When I put new thermostat in, and bled the cooling system of air... with engine running. After the thermostat opened... I turned off the engine.... and immediately it blew 1/4 contents of coolant out of the radiator...???? (head gasket??)

Anyway I am puzzled, can anyone help me, or suggest some things to check...???

Thanks (again)









After

[smiley_smoke]

have you replaced the radiator cap recently?
sound dumb but i got one from an Auto shop and it didnt seal too well. had coolant everywhere. decided on getting a replacement one in.
may help...?

[beaver700]

Thanks smileysmoke,

I have recently got a new radiator cap... I will check it, but for some reason there are bubbles still coming up in the coolant...

[tazzazuk]

make sure the temp sensor wire is conected to the brass fitting. it is in the front of the thermastat. that is if the gague isn't working at all

[lay80n]

Remember that the gauge only reads water temp, not air temp. If the sensor is not surrounded by coolant, it will not read correctly. If you lost heaps of coolant, it will not show an overheat as there isnt coolant round the sensor.

Layto....