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Is my head gasket blown?

Old 02-11-2019, 05:27 PM
Junior Member
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Join Date: Feb 2019
Location: Shelton
Posts: 1
Default Is my head gasket blown?

I just bought a 98 Civic DX and it overheats. It doesn't have water in the oil. Has new radiator it builds pressuer in the radiator and sprays the coolant out of the radiator cap almost instantly when you receive the engine but it won't when it sits at idle. I have never ran into this problem before so I'm wondering if the head gasket is blown differently.? Just want to know before I tear the engine apart. I already took the thermostat out and tried that but did not do anything. In anyone could tell me why it is doing this I would greatly appreciate it thanx
Old 02-11-2019, 11:05 PM
Senior Member
Join Date: Sep 2018
Posts: 110

So, running engine or revving would work the engine harder
And when sitting at idle, engine isn't working so hard
Working harder makes for more heat
If coolant isn't flowing then engine may not be cooling fast enough to prevent overheating
At idle, engine is not producing as much heat as when running or revving higher
So moderate coolant flow could be enough to keep engine cool

I would check thermostat and then see if the coolant is flowing.
Try turning on the cabin heater to see if that will cool down engine.
If not check coolant level and check for flow.
My suspect would be a weak water pump
But, this is only a guess.
Old 02-16-2019, 09:50 AM
Senior Member
Join Date: Apr 2009
Location: Evans Ga.
Posts: 2,717

The thermostat may be defective,even new ones malfunction. My next step would be a compression test.
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