Ive search the entire universe and cant obtain a concrete solution as the answers where all over the place ... lol.
Hi guys,
In the last couple of days,
noticed that the coolant overflow bottle is filling up and not returning the coolant back into the radiator. Therefore i am constantly topping up the radiator when it has cooled down.
There is signs of coolant in the top tank when i top up - so the radiator is not dried up.
Seems that its not holding pressure or there is AIR in the system.
Inspections
- No signs of any leaks/worn rad hoses or punctured clamps etc.
- Temp needle fluctuates from middle line to just above the middle line
- Radiator has no signs of any leaks, damaged core/fins, or any signs of oil/gunk residue.
- Water pump is good as gold and no signs of leaks either
- Coolant has not reach boiling point level (coolant not boiling)
- HG not damaged/leaking (afaik)
- Heater hoses are connected correctly
- The siphon on the overflow is good and no signs of holes/punctures etc.
- Overflow bottle/cap is on and not damaged
- Radiator fan turns on but very late - and i would assume its too late when it turns on that the coolant overflowed to the bottle by this point.
Whats been done
- It has a low temp thermostat
- It used to have a low temp fan switch but was replaced back to OEM item due to connector damaged.
- Radiator is an ebay 43mm Alloy high quality core
- Radiator Cap is a 1.1bar (came with the radiator)
- Coolant was flushed recently 40c/60w mix
What could be the problem?
- Should i replace back to a low temp fan switch?
- replace to a new low temp thermostat for assurance?
- Reflush the entire system again for assurance?
- Bleed the system? (how do you bleed the cooling system properly? is there a DIY? - where is the bleed valve on the top hose housing?)
- Replace the crappy 1.1bar rad cap for a 1.3bar cap ftw?
- Radiator fan turns on but very late - and i would assume its too late when it turns on that the coolant overflowed to the bottle by this point.
oh its a B20VTEC conversion recently.
thnx fellaz
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