ok so when i drive on the freeway my temperature goes up past half and then its weird cuz when i drive on the street my temperture is normal, it goes down... then i checked if there air on the radiator so i release the cap while its running there was no pressure at all.... it did not shot up... is that normal? and another weird thing is that i have a koyo radiator. so what should i do... ? i got no pressure and it overheats when i drive on the freeway..

 

how is your coolant level? sounds like a bad pressure cap

 

my coolant level is fine and my cap is new

 

Ok Check you radiator for leaks, also check your water pump and housing, The seals could have gone out and drains the coolant. look for white spill marks around your engine bay and fine the source

oh and also try this

when you are testing your car rev it up to 3k or so for a good min. then check for leaks under the car.
but check the water pump/water housing and thermostat and last the radiator

 

my seals are fine.. im not loosing any coolant my termostat still looks brand new.. barely put them on few months ago.. radiator is koyo... i dont know its weird.. it only goes up on the freeway.... im gonna be changing my water pump... im just waiting for it.. i special ordered it from auto zone for 37.99 hopefully thats the problem... if not i dont know

 

did you find any white/gray runs around your engine?

 

no nutting .. what is that

 

hate to ask, but got undertray?

 

the only thing i could think of trying is flush your system make sure theres no air in the system. Well either way when you install your new pump youll have to do that anyways.

 

oh its water or coolant that spilled on your engine thats all but yeah a good flush and new water pump should do it some times a after market radiator could read wrong and throw out coolant in your coolant bay and could make it over fill and spill. and when cooling down the car it sucks it back up. and leaves you with less then you had it

 

oh ok... we'll see what happens today if i get the water pump...

 

So any change?

 

simple, just get a pressure pump to test if your coolant system is holding pressure or not. You will also see where your weak spots are. If pressure holds, throw the new radiator cap out of the garage and step on it.

 

no change.... i changed the water pump and termostat again and still no change...

 

Hows the temp @ freeway speed

 

good idea. a pressure pump isnt very exspensive. Sometimes even new rad caps are bad, happened to my buddy with his supra.

 

it could be a bad relay sensor on the gauge itself

 

I was installing my new koyo today and thought about your thread. Then i thought maybe he didnt take the cardboard off the radiator thats why hes overheating haha. j/k.

 

you should get a sr20 and call it a day!!

 

Yet to hear the answer to this question.. sounds like it could be the problem.

 

ok i went to pepboys this weekend and got it flushed twice.. drove it and then its still the same thing.. so i put the fan clutch back and still running the electric as well and still kind overheating... i think its still clogged some where cuz when i had the old radiator.. it was crack so i put that stop leak thing and i think it got clogged up somewhere in thsoe little hoses im not sure....

 

Ack you shouldnt have put that stuff in there. Our cars dont like any crap like that in it. Im almost positive thats the problem.

 

so how am i gonna get rid of that... i flushed it twice .. do u know any sites where i could get the diagram for the coolant stuff where it travels.. maybe i could go tru that and find where the clogged is

 

junk it... PM me for free towing so I can relieve you of your headaches.

 

**** koyo rad's i got mine, and all its been is a pain in the ***. it has less than 3k miles on it, and it leaks. its been making my car run hotter than normal.

i have the same freeway problem, i drive it around streets, get on the 101 and then wham, it shoots up 1/2 way. hit traffic, slowly goes down. im getting it looked at today.