- Sun Jun 28, 2015 6:07 pm
#354427
Hi everyone. I need some advice. I have a 95 civic with an B18cR swap. I am running the stock civic radiator.
Recently my car started to overheat. Upon some investigation I discovered that the coolant was overflowing out of the reservoir tank and emptying the radiator until it was too low on coolant and the engine would overheat.
I thought that it was the head gasket leaking and letting combustion gases into the coolant. Note that the engine runs fine and there is no smoke. Compression test shows 270 psi in each cylinder.
I tested for exhaust gas in the coolant today with a block tester and it came back negative. I tried it three times and the fluid never changed color. While doing the test however, I noticed some small black pieces of rubber floating in the radiator. I picked them out and this is what I got: http://grab.by/Iq8u
I am thinking that they are from the bottom of the radiator cap but I am not sure because I never payed attention to the bottom of the cap before; I dont know what it is supposed to look like. Can someone confirm this for me?
Also I noticed that revving up the engine caused the coolant to rise. It lowered again when the radiator fan kicked on which I thought was weird. Is this just the thermal expansion of the fluid? Im talking about around .5" difference.
My problem might just be the radiator cap which will be awesome if so. The head gasket is only about 2 years old and I really don't want to install a new one again. It is OEM in case you were wondering.
Thanks in advance!
Recently my car started to overheat. Upon some investigation I discovered that the coolant was overflowing out of the reservoir tank and emptying the radiator until it was too low on coolant and the engine would overheat.
I thought that it was the head gasket leaking and letting combustion gases into the coolant. Note that the engine runs fine and there is no smoke. Compression test shows 270 psi in each cylinder.
I tested for exhaust gas in the coolant today with a block tester and it came back negative. I tried it three times and the fluid never changed color. While doing the test however, I noticed some small black pieces of rubber floating in the radiator. I picked them out and this is what I got: http://grab.by/Iq8u
I am thinking that they are from the bottom of the radiator cap but I am not sure because I never payed attention to the bottom of the cap before; I dont know what it is supposed to look like. Can someone confirm this for me?
Also I noticed that revving up the engine caused the coolant to rise. It lowered again when the radiator fan kicked on which I thought was weird. Is this just the thermal expansion of the fluid? Im talking about around .5" difference.
My problem might just be the radiator cap which will be awesome if so. The head gasket is only about 2 years old and I really don't want to install a new one again. It is OEM in case you were wondering.
Thanks in advance!