Cameron60

I keep trying to blled my cooleant System using the steps provided here and in my helms book.. But my radiator keeps letting out bubbles ever so often.. Makes me wonder if i have a blown headasket. I havent really driven it much but my car DOES NOT overheat. No smoke out the exhaust and i did a compression test and got 180 across all cylinders. (98 B18B).. Does that rule out head gasket? Thanks

juevi

With an open cap you'll get bubbles here and there. If it's not loosing coolant, I wouldn't worry about it. What I usually do is this.

Fill radiator. Start car. Give it throttle and hold it between 2-2.5k and just hold it there for a WHILE, do it while your under the hood. The coolant will heat and raise some, some will spill out, you can use a infared temp gun or simple hold the bottom hose.

The bottom hose will be cool, and THEN you the coolant will start to go down some as the t-stat opens and the lower hose will get warm. Top off, throw cap on and make sure the resevoir is full. Drive to make sure everything is cool. Keep eye on the temp guage and coolant level for a day or two. Large air pockets CAN happen, but usually the small air pockets will work themselves out through the overflow.

instructor74

it can but the final test would be to have the coolant checked for exhaust gasses to 100% sure. what happened to make you think that you have a problem in the cooling system/bad head gasket?

Cameron60

Prbably cause thats the last thing i would want (blown gasket) and its a used motor from a JDM junk yard.. I mean it looks like it was definantly taken car of. So if im not over heating or getting of the other symptoms then am i pretty safe to assume its not a headgasket? Any other tests? I would get a leakdown but i cant drive it cause its not registered and im paying off my registration which is alot.

recycled air 90

i just had a blown head gasket. heres a quick test. take off the radiator cap and try to start the car. if coolent comes flying out then yes you have a blow.

instructor74

So its a motor swap and your just checking things out. Just make sure that all the air is out of the system its not to uncommon to see little bubbles when you first fill and bleed the cooling system.

Cameron60

Ive been trying to bleed it for an hour and a half in total. Its just not bleeding. Is there anything else it can be?

travis-b16a2-eg

sometimes after my car idles for a while the radiator will overflow to the point where its spraying out, i just switched the thermo. i was thinkin it could be the oil cooler, or the head gasket. lmk what you think

DarkSyde Design

it could be your waterpump, heatercore, or you could have some hoses routed wrong. i'd make sure all your vacuum and coolant hoses are hooked up the way there suppose to be. i just had a similar problem. they thought it was my heatercore and i rippied out my entire dash. come to find out it was a vacuum line that was running into a coolant line and overflowed my charcoal canister for my gas vapors.

travis-b16a2-eg

i dont have a heater core so that wouldnt be it, but my canister is all rigged up, theres a small connector at the top of the canister thats not connected to anything. i have no ac or heater core, but im thinkin it would have to be from either the canister or the water pump. lmk if you can help me out with where the lines on the canister route too, its a 94 civic hatch w/ b18b1 swap