my astra gsi k reg 1992 144k miles right not sore wots happening... the car wont overheat. it will sits at 91c ............ fans on a home made switch .... but problem is the water is bubbling back in the header tank...the heaters are some times warm and some times cold ... also when switch heaters on car then it trys to over heat ........ tryed getting air locks out ........can any one help
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astra gsi redtop overheating problem
- Thread starter dazbrunt
- Start date
Are you losing any coolant?
check you've got no signs of head gasket failure.
Do a basic thermostat check. Feel the top hose to the rad. This pipe should stay cold as the rest of the system warms up. As the thermostat opens you'll feel the top hose and the rad suddenly get hot. This is a good indication that the thermostat is working. If all the system warms up at the same rate or the top hose/radiator never get warm you've got a thermostat problem.
I'd try draining the water and flushing the system as best you can. Sounds like theres some sort of restriction to me?, have you ever put rad weld in it?
Do a basic thermostat check. Feel the top hose to the rad. This pipe should stay cold as the rest of the system warms up. As the thermostat opens you'll feel the top hose and the rad suddenly get hot. This is a good indication that the thermostat is working. If all the system warms up at the same rate or the top hose/radiator never get warm you've got a thermostat problem.
I'd try draining the water and flushing the system as best you can. Sounds like theres some sort of restriction to me?, have you ever put rad weld in it?
