that is how my engine bay look like.
since i cant buy an OEM intake system, i just put a 92 JDM accord intake in LOL

well, my coolant reservoir drain out VERY VERY fast. for example, yesterday, i filled it up to MAX. after 3 runs (engine on for 1 hour) 10 minute of racing, the coolant reservoir was EMPTY.
in normal driving condition, its take about 4 days for the coolant reservoir to be emptied.

there is no visible LEAK. i check the floor and under neat the engine. my car is 87k, automatic d16y8 vtec 2000 civic ex. all stock. (mods are visible in the picture above)

help me out guys!

 

Possible blown head gasket?

 

head gasket?
sounds bad.
can you tell me more about it?

 

ttt

 

Don't bump this thread anymore, he already answered your question. Replace it.

 

Is there white smoke comming out of your exhaust? Check under the oil cap and see if theres a milky white mixture. This would consist of both oil and coolant mixing. You can also check the oil dipstick for this. Is there any cracks or leaks comming from the radiator itself? Next time you have your car parked, put a carboard box underneath the raditaor, this will be alot easier for you to see a possible leak.

I would also check the upper and lower radiator hoses and where they meet the radiator. It's also possible you have a blown head gasket, or intake manifold gasket, but the intake manifold gasket is more unlikely. Check these things and let us know what you find.

 

Pull a spark plug and see what color the tips are and if you have a flash light you can look in at the piston and see is they look clean ( as in brand new kinda clean )

 

i looked at the engine closely.
no oil floating in the radiator. oil is clean, no milk . sparkplugs are cool.
i also found a small leaking spot on the radiator.
i ll have it weld.

btw, 409.55 bucks for the new one, Denso OEM

 

please close. problem solved