Not sure what an sb combo van is?
Please provide year, make, model, engine size - will help with troubleshooting. There is always a reason for a problem.
Does the temp gauge show overheating?
Does it boil the coolant or leak it out?
Has the thermostat and/or water pump been tested or replaced?
Does it have a engine belt powered radiator fan or is it electric? And does it work?
Let me know? Maybe I can be helpful !
Testimonial: "Hi, A its a 1996 holden sb barina combo van and has a 1.4 ltr engine does not use water and just about to change the waterpump and thermostat. The temperature gauge goes up to 110 in about 25km and has always sat about 80 on the temp gauge.It has a electric fan which i changed for a new one today but didnt make any difference the fan comes on but it doesnt seem to come on as early any more since i had new temperature sensors put in. Thank Jo"
Over heating will probably be the cause of most problems as it sends the ECM crazy with so many sensors inputting information
If you have a viscous fan hub then replace it as it is the prime cause of overheating .have a compression test done to check head gasket and cracks
If you have electric fans make sure that they are working
ckeck coolant level at the radiator cap
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