Unfortunately, after I changed my head gasket, I am still overgheating on a track . Read my original thread here https://honda-tech.com/zerothread?id=826259.

Today, my heating and interior fan was set to max and I was still overheating - when I saw one bar over middle, I had to slow down. When it went down to middle, I ran hard again, but after about 2 minutes, it raised one bar up again

I just need your help again guys. I assume I will remove and test the thermostat first, even if it looks like operating.

 

Maybe you covered this in the original thread, but how old is your radiator? Perhaps it is clogged, and not letting the fluid through as it should to properly cool the motor under heavy load, like on a track. Just a thought.

 

I think it's still an original one, from year 1995, so it's 9 years old. I bought the car used, so I'm not sure.

I cleaned the radiator with pressure air before the track event and I noticed that some grid (the material that fills the radiator's "hoses") is released from the radiator. It was in the corners of the radiator.

 

I would change your radiator. It's pretty inexpensive to do and a good maintanence item to replace, especially since you track the car.

How old is your water pump??

 

Hope you get it sorted, I would have said the engine surface near cylinder 1 but I dont know if you hade the straight edge over each cylinder and over Cyl 1, Hope you find out soon

 

I was thinking radiator but movedaway from that idea as thereis residue inside on and near the valves.

 

Ya, if it is the original, and the previous owner did not change the antifreeze, it could have coroded the inside of the little tubes, causing blockage, and not allowing the anti-freeze to flow through the entire radiator, thus not cooling it properly.

Change the Radiator, this may also be why your head gasket decided to give way, because of the added pressure being caused by the clogged radiator, and may also explain why your radiator hoses are so tough to squeeze while the motor is running.

 

A radiator shop can always flow check the radiator to tell you if it is good or bad. If this is only under race or hard driving conditions, I would definetely pull the radiator and at least have it flow checked.

When you did the head, did you have it checked for cracks and flatness?

 

change out your thermostat
bleed your coolant lines
replace radiator cap