ok so driving my car this evening it started overheating about 3/4 the way. then it would come back down and up. It would actually start going down when i would floor it. this all started when i dynoed it today and on the 3rd run, the lower radiator hose split where it meets the thermo house. Put a new hose on, filled it. Drove it for 3 hrs, then got on the interstate and it started this. I have similar problems on my last motor builds too and im like wtf??? cause other peoples builds i have done have zero issues. anyways, She was overheating this evening one time and the heater started blowing cold. i was like WTF??? I got to a friends house and put the hose to the radiator and it ran not to much pressure, a nice trickle, it tok about 30 seconds to fill up the radiator. Im not pushing the coolant out of the overflow tank. Im NOT SMOKING AT ALL, NEVER HAVE. I CANT SEE ANYTHING LEAKING ON THE GROUND ANYWHERE. WHERE THE expletive IS MY COOLANT GOING??!??!? I know im going t get a bigger radiator. Im guessing 630hp/440tq isnt good on a dual core vtec radiator.

 

If it isn't apperent, could be 1)cylinder head gasket, it leave slow as steam; 2) I put my money on your water pump seal, if your water went low, the pump gets hot and the seal go # 2.
The next thing to happen is water will weep out the weep hole until your system can't cool itself.

 

the water pump seal is good no leakage. water weeps out of what weep hole?? lol

how long would it take cause it starts overheating in a matter of 2-3 hours of driving once i put water in it again. if it was te headgasket, wouldnt get hotter from getting on it with boost ranging from 12-20 psi? it usually goes colder.

 

im starting to wonder if my radiator just cant handle the interstate driving. its a stock del sol vtec radiator. it only does this **** when im doing long distance interstate for an hour constantly or more. it might do it sometimes during city driving but maybe once every 2 or 3 weeks if i get on it a bunch. hmm.

 

edit from when written: i burped and filled it last night. drove it this morning, i got about 8 miles and it started to climb to 3/4, this time it wouldnt go down. The heater stopped working. Now this happened to me in my del sol when i built my first motor so i dont know what the expletive the deal is. but when it happened in my del sol, it was steaming/pushing water out of the reservoir. this time theres barely ANY water in my reservoir and not one bit of steam, and no heat also. WTF??? no smome out the tailpipe, it actually like to go down if i drive the **** out of it and it will go down to about half way if i idle it.

 

check under your oil cap.. if there is any sigh of White crap under there its the head gasket.. If not the gasket.. check things like.. Is your header or turbo blowing on the raditor. Is your cooling fan hook up backwards and blowing air out the front of the car.. when you drive it will fight for air flow direction and not cool.

is your thermostat stuck shut?

 

under the valve cover looks tip top. fan is fine.

the other day when it was overheating, i popped the reservoir and the car was OFF and the overflow tube was blowing bubbles in the reservoir. I didnt think the rad cap was suppose to do that, and it was not even 3/4 the way up on the needle

 

you still have ari in your system look in your helms or online for bleeding proceedures

 

ok heres whats up.

I just went and drained my radiator, checked my thermostat, its fine. refilled and burped. when i rev the motor up though it would bubble up a little bit but that seemed normal to me because of the circulation. it would bubble just sitting there idling anymore though so i capped it and drove. I drove for about 15 minutes just like this morning. then i beat the **** out of it. Now normally when i would really get on it hard, the needle would rise to exactly half way then fall back to normal temp. thats what it was doing this time. it would go to about half and then float slowly back to normal temp. I dont know if its cause im using a stock dual core radiator or not, but my old motor did that as well. When i got back, the needle was at normal temp and i popped the reservoir and the water level was near the top and small bubbles were coming out, does pressure bleed off into the catch can, im guessing so. the revervoir was about half full when i left to test drive it, i guesss when it cools off it will get sucked back in. i know that i saw wetness on the upper hose from it spattering out of the catch can lid which wiggles anyways and doesnt make a seal. its the kind that just twist about an 1/8 of a turn to seal.

 

Thats how it is supposed to work. If you have a blown headgasket. or one that seperates for a split second It will push fluid in the overflow. or if you have alot of air in the system it will push fluid out untill the air is gone

 

ok so i drove it all today and no overheating. i pull into a lot to make a fone call and was talking while idling and after about 5 minutes it starts to overheat, JUST SITTING THERE IDLING. turned it off and let it cool, put some water in and then drove away no heating. got to where i am now and let it idle for 5 minutes didnt do anything. i was thinking about the whole radiator thing, it cooled my setup just fine earlier in its life, about 2 months ago, i dont see why it wouldnt now, BUT IM STILL GOING TO GET AN ALUMINUM ONE. so im leaning towards a small leak in the headgasket. I guess i will be commence changing it sometime soon.

 

im so ****** frustrated with this. this is the last time im gonna get input before i start ripping **** apart.

today i get off work at 5pm. leave out for atlanta one hour trip. I get about 20 miles into it, starts over heating like a bitch, 3/4 the way up, then it starts going higher and i finally pull over cause i wasnt going higher. i ****** let it sit, finally pop the cap, prolly pour a cup of water in there. crank it ,drive it, not even prolly 12-15 more miles it starts again, 3/4 the way, then starts going higher. i pull off, let it sit, refill, then continue on to my destination cutting it off at every redlight to prevent further heartache. get to my destination, let sit for about 4 hrs. pour another cup of water in. leave out at 10:15pm for home. would not overheat one ******* bit. not a drop, so i get closer to home and start beating on it. 4th gear pull 16 psi. nothing. stayed the same. did another, still fine. Get on my country road and do another. then i do 2 -3rd gear pulls at like 18-19 psi, hard pulls spinning tires like greased lightning. still not ****, pull into drive way it sits for about a minute and half idling AND THEN IT STARTS TO GO UP, WHILE IM IDLING. it gets 3/4 the way up so i hold the gas at like 6 grand and the ****** goes back down. to the middle ish area and i cut her off to come inside and start this bitchin. WTF IS THIS BULLSHIT, i cant ge it to overheat beating on it, just driving it normal*sometimes* and idling it. This is ****** retarded. Im changing the radiator for a brand new oem dual core tomorrow and if that doesnt help im ripping this **** apart.