help guys, my engine temp rises past half under boost, but when at idle at a stop light, or when parked its normal..
fill me in. im thinking head gasket,

oh yea my o2 sensor the wire melted off also..

 

how much boost are you running?

 

park your car and see if the fans are working. also, flush the radiator, replace the thermostat, and add a good brand coolant, prestone etc. i had the same problem cause my fan switch sensor was broken.

 

if that does not help get some watter wetter by "redline" it helps keep my temps under contorll.

 

i heard about that purple haze stuff that makes your engine run 50% cooler, but if u leave it in over winter your coolent will freeze and crack your block, so that ---- must work.

about the boost im running, 6-8 psi
i had the car parked and the fan comes on. but ide liketo take the thermostat out and leave it out so it runs cooler non stop. oh yea i also have a 91 civic 4 dr radiator in the car, it is 8 inches longar than the stock 91 civic hatch back radiator.. so more rad. more cooling power.

fill me in on your info..

 

this heating up only happenes on the highway and sometimes in town under boost

 

check your hoses any little leak WILL cause it to over heat when your on it hard.it wont hold pressure.

 

Theirs no way the 4dr one is 8 inches longer,im almost positive their the same . I wouldn’t take the thermostat completely out but you could drill a few holes to help the flow out a little.
steve

 

snake-oil mystery coolants aren't going to fix a problem that is physical. Run pure water in that bitch if you want to, it will work if your innitial problem is solved.

so...
-check for leaks
-hold head gasket under suspicion
-ensure you don't have a relay or fan motor going out on you