Ok guys i know everyone is sick and tired of seeing another overheating thread but this one might be a lil dif. Possibly cracked CYLINDER HEAD?

Well since it was overheating i decided i need to make sure its fixed so i decided i was gonna put a lil more with it. So i went out got some full race traction bars put the new EG rad in it with new slim fan. Replaced the water pump, thermostat, rad cap, thermo sensor, and throughly cleaned the system. I also did a compression and leak down test. ALL GOOD. Compression was about 270 on all 4 cylinders and and leak down was no more than 8% on all 4 cylinders. I then bleed the system with heat on full blast extremly well about 2 times about 30 min a piece Well i thought this was def going to fix my overheating isssue. WRONG. The bastard still overheating. Its advadently building pressure somewhere becuase it fills the resivor completly up.

My heat only comes out sometimes but when it blows out cold air then it overheats. As soon as the heat blows again it begins to cool down. So obviosuly theres air in the system which causes no heat to come out when the air passes threw the heater core. THATS MY OPINION!!


So to sum it up i cant figure out what the crap is going on. Do you think theres a possible crack in the cylinder head causing air to get into the system? Thats the only thing that can be left. PLEASE HELP!!!!!

THANKS!!!


Modified by doublek at 7:33 PM 7/28/2005

 

Could be a cracked cylinder head, and I know the heater core acts as a secondary emergency radiator, the Roadrace gents use it when there fan is dead and or overheating.

 

someone has to know or have had a this problem.....i cant be the first.....

 

bump for some info....

 

Looks like you are having close to the same problem I was having in this thread, turned out to be a water pump failure in my case.

https://honda-tech.com/zerothread?id=1088141


when I would get on the gas, the heater would blow cold and the car would start to overheat, if I was just putting around the heater would blow warm and the car would stay at its proper temp.

I started doing this for about a week and a half before the waterpump starting to leak.