99 Civic LX leaking coolant out of overflow
#1
99 Civic LX leaking coolant out of overflow
My Honda civic has been great. Just recently when driving the car it overheated(gauge went to 3/4) and I pulled over and overflow was at min but rad was almost empty. This has done this now 3 times over the last week. From what I can see there are no leakages from rad. I have read the forums on overheating and checked for coolant in transmission...theres none. Checked oil level is same no increase. All the leakage is coming from the overflow. checked overflow pdf from http://www.tegger.com/hondafaq/tsb/civic/x00-025e.pdf
wasn't that.
thanks for your help
wasn't that.
thanks for your help
#2
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Re: 99 Civic LX leaking coolant out of overflow
Coolant in transmission? If you're not leaking it, you're burning it. First thought with these old cars is a failed headgasket.
#3
Re: 99 Civic LX leaking coolant out of overflow
I am leaking out the overflow. no leaks in rad and not burning it either. The car runs great lots of pep still and no other problems.
#4
Re: 99 Civic LX leaking coolant out of overflow
Ok. Fill the radiator + overflow tank and floor your car above 4k RPM with gear 1 or 2. Check if you see coolant all over the engine compartment or around the overflow or both. If so, your head-gasket is toasted. Your engine will slowly lose performance. Hard starts, misfires, shaky/rough idle, loss of power. They are not in order but they will happen. Also, you'll have a lot of overheat after driving on freeway.
#6
Re: 99 Civic LX leaking coolant out of overflow
out of any of these 3 times you re-filled the radiator have you burped the cooling system?
also I don't see how under ANY circumstances. Coolant will enter the transmissions. unless it's leaking so damn bad you can't put coolant in fast enough.
LOOK UP COOLING SYSTEM BURP PROCEDURE
the procedure is common there's nothing to complicate the burping on this car.
also I don't see how under ANY circumstances. Coolant will enter the transmissions. unless it's leaking so damn bad you can't put coolant in fast enough.
LOOK UP COOLING SYSTEM BURP PROCEDURE
the procedure is common there's nothing to complicate the burping on this car.
#7
Re: 99 Civic LX leaking coolant out of overflow
Ok. Fill the radiator + overflow tank and floor your car above 4k RPM with gear 1 or 2. Check if you see coolant all over the engine compartment or around the overflow or both. If so, your head-gasket is toasted. Your engine will slowly lose performance. Hard starts, misfires, shaky/rough idle, loss of power. They are not in order but they will happen. Also, you'll have a lot of overheat after driving on freeway.
uhm don't do this ^
I can't believe people would suggest such idiotic things. This is probably why these are beginners cars(inexperienced kids own them who take advice from their "mechanic" friends then relate it to you).
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#8
Re: 99 Civic LX leaking coolant out of overflow
My fans are working. I never burped the coolant system yet but will go and do it. The radiator cap looks good but I am going to get one anyway.
#9
Re: 99 Civic LX leaking coolant out of overflow
well since you emptied, refilled the system 3x now. im sure it's so backed up with air the only place for it all to escape since there's nothing wrong with the cooling system is via overflow tank
burp the system it will be fine.
leave the cap alone until the seal dies.
burp the system it will be fine.
leave the cap alone until the seal dies.
#10
Re: 99 Civic LX leaking coolant out of overflow
here try this
http://www.hondacivicforum.com/forum...leeding-41650/
http://www.hondacivicforum.com/forum...leeding-41650/
#11
Re: 99 Civic LX leaking coolant out of overflow
If you're not leaking it, you're burning it
#13
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Re: 99 Civic LX leaking coolant out of overflow
Running a test to determine if exhaust gasses are getting into the coolant is relatively quick and painless. So are compression and leakdown test when performed correctly. I don't think I would advise any course of action that induces worse performance to the engine as a diagnostic tool.
#14
Re: 99 Civic LX leaking coolant out of overflow
out of any of these 3 times you re-filled the radiator have you burped the cooling system?
also I don't see how under ANY circumstances. Coolant will enter the transmissions. unless it's leaking so damn bad you can't put coolant in fast enough.
LOOK UP COOLING SYSTEM BURP PROCEDURE
the procedure is common there's nothing to complicate the burping on this car.
also I don't see how under ANY circumstances. Coolant will enter the transmissions. unless it's leaking so damn bad you can't put coolant in fast enough.
LOOK UP COOLING SYSTEM BURP PROCEDURE
the procedure is common there's nothing to complicate the burping on this car.
#15
Honda-Tech Member
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Re: 99 Civic LX leaking coolant out of overflow
Check all your hoses for cracks, splits, or bad clamps. Check your radiator for leaks or cracked end tanks. The easiest way to do this is burp the coolant system again, place the cap on, and let the car run up to temperature (a few fan cycles) while in the driveway. If it's a leak, it should become obvious.
If the spilling coolant is coming from the overflow tank, you could have a blown head gasket, a bad radiator cap, or air pockets still in your coolant system.
How are you burping? You should be using something like the Lisle funnel. Make sure your climate control is all the way to the heat setting while burping. Squeeze hoses to push air bubbles out.
#16
Honda-Tech Member
Re: 99 Civic LX leaking coolant out of overflow
Run the car shortly until it starts to warm up and look at the base of the timing belt cover. If it's dripping, it's your water pump most likely causing the problem.
Last edited by Maxcapacity; 05-14-2022 at 01:18 AM.
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