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Old 09 Nov 2011, 05:01 am
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Default 2000 Honda Civic EX is building pressure on the radiator.?

I have 2000 Civic EX, and I recently had the head re-surfaced and replace the head gasket. I replace the timing belt as well. When I was done I open the radiator cap and turned on the car and I get a big splash of coolant, it doesn't splash everything out, just one splash and that's it. Is this normal? I didn't replace the water pump, in which i should of done also. But is that pressure normal? I left the car Idle for about 5-10 mins and then open the radiator cap again and I still get that only pressure. I check the oil, and there is no coolant in the engine, the oil is clean. I open the oil cap, and oil is fine... Does anyone know what this could be???
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Old 09 Nov 2011, 05:16 am
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sound normal to me. try not to burn yourself with the hot splashing coolant.
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Old 09 Nov 2011, 05:31 am
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Sounds normal, its a pressurized cooling system.
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Old 09 Nov 2011, 05:46 am
unk unk is offline
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The "blurp" that you're getting is - as others have mentioned - due to a pressurized cooling system. It's possible the engine wasn't filled completely w/coolant when it was reassembled, leaving some air in some of the harder-to-reach spaces. This isn't a bad thing as long as the engine isn't overheating. As the engine warms up and operates for awhile, the air will bleed out on its own by "blurping" out of the radiator and into the recovery tank. When it cools, it will siphon coolant back into the radiator. Thus the term "recovery tank." You don't need to keep checking the radiator at the cap - just make sure you keep the recovery tank at the full mark (look on the side) for the next month or so.

If your engine begins to overheat, you see foam in the oil, oil in the recovery tank or the exhaust smells "sweet," get thee to a mechanic most ricky-tick.

Whatever you do, DON'T open the radiator cap on an overheated engine.

Good luck & happy motoring
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Old 09 Nov 2011, 02:53 pm
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Default Re: 2000 Honda Civic EX is building pressure on the radiator.?

Put the car in a incline or jack up the front to get rid off the air and add some water, wait couple of minutes and try again most likely is just air and this is normal
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