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  #1  
Old June 21st, 2004, 14:46
BIGSLVRXJ BIGSLVRXJ is offline
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Exclamation Bad Coolant Loss

My 90 XJ 4.0 is going through coolant incredibly quick. It has no leaks-that I have seen and I just had all major cooling components replaced. I have a new upper radiator hose, water pump, and radiator. The only thing I can think of is I had a Maaco paintjob done and they sprayed the front of my radiator which is (correct me if im wrong) my condenser fins. Would this have anything to do with my problem and if not what could it be?
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  #2  
Old June 21st, 2004, 14:53
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Re: Bad Coolant Loss

Start it up and let it warm up, start looking for leaks, if you have access to a cooling systems pressure tester pump the cooling system up to 17lbs or even 20lbs and watch. The pressure tester can be done either running of shut off.
Seat of the pants guess, you tightened the clamps with a screwdriver instead of a 1/4" socket set or nut driver and did not get a good seal. When I put new hoses on I coat the inside of the hose about 1" in with indian head gasket cement and then put them on. If it is not spraying all over the engine compartment then it is probably coming out the lower hose either at the water pump or radiator. The pressure method is the better because you can watch to see if it holds pressure while drinking a cup of coffee.
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Old June 21st, 2004, 14:59
BIGSLVRXJ BIGSLVRXJ is offline
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Re: Bad Coolant Loss

Well the only thing is ive been looking for coolant on the ground and cant find any. I just hope its not getting in to my oil supply. I've heard if the internal gaskets go bad coolant can leak into the oil and vise-versa. If the condenser fins are clogged I wonder if that could be making it consume more coolant though. Just a thought but I wonder.........
Anyway if it is mixing with my oil it will be a crapload of money to fix I'm sure. If anyone has ideas on if the condesner fins being clogged could do it or any other reason please respond.
Jeepguy
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Old June 21st, 2004, 16:08
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Re: Bad Coolant Loss

I occasionally, especially after a trip through the mud, remove the electric fan and shine a flashlight from the motor side out (works better at night), they can be clean on the front and dirty inside. At most anyplace, that sells refrigeration supplies, you can get a fin comb, helps cleaning the condensor without bending the fins (much).
Ive had leaks, that were in spots, where the coolant evaporated almost as soon as it leaked out. Often a white stain or a stain the color of the coolant, where this is happening. Like mentioned before, the bottom radiator hose (engine side) is a prime spot to look. Under the pressure bottle, is another. Rubbing likely areas, with a paper towel, will often show some color (red/green withever color your coolant is). A very small pinhole leak in the radiator is also a possiblity. Look for places the radiator fins look roted (or green), often down low (on the inside), seams sometimes split and throw a coolant mist out.
If a head gasket is bad and coolant is getting in the oil, the oil level will rise on the dipstick, oil often looks like a mocca milkshake.
If its getting into a cylinder, overheating is often the result and the coolant foams in the surge tank. Rubbing a paper towel lightly at the exhaust opening after start up (not the soot, just the liquid)will often show a stain the color of your coolant (if the head gasket is leaking). There are better tests, these are just indicators.
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Old June 21st, 2004, 16:15
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Re: Bad Coolant Loss

Also, don't forget to check your heater hoses.
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  #6  
Old June 21st, 2004, 16:28
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Re: Bad Coolant Loss

Is your 90 open or closed system ??
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  #7  
Old June 21st, 2004, 18:01
BIGSLVRXJ BIGSLVRXJ is offline
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Re: Bad Coolant Loss

I think the coolant bottle is just leaking but its the system without the radiator cap.
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  #8  
Old June 21st, 2004, 23:27
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Re: Bad Coolant Loss

Replace the bottle and the pressure cap on it before going any further.
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Old June 21st, 2004, 23:41
ZmOz ZmOz is offline
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Re: Bad Coolant Loss

Have you checked your oil? It has to be going somewhere - if it's not on the ground it's in your oil. The oil will look milky if there is any coolant in it. It could also be coming out of the exhaust...look for steam.
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Old June 22nd, 2004, 11:46
BIGSLVRXJ BIGSLVRXJ is offline
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Re: Bad Coolant Loss

Would I be able to notice the milky-ness on the dipstick? Or would I have to drain the oil?
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  #11  
Old June 22nd, 2004, 13:50
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Re: Bad Coolant Loss

That coolant bottle is under 17lbs of pressure, if it has a crack and/or is 'leaking' that is where your coolant is going. Get a new bottle and pressure cap [that cap is what maintains pressure on the system] they generally go bad because of age, location and just a lousy design.
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Old June 22nd, 2004, 20:37
BIGSLVRXJ BIGSLVRXJ is offline
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Lightbulb Re: Bad Coolant Loss

Hey Rich I think you might be on to my problem here. I have a crack in the very top of the pressure bottle I can't tell if it's all the way through or not but in the top would it leak out? Also, I can't tell if the cap is junk is there a way? Last here if I do have to replace the whole bottle where is the best place to get a new one? O'Reilly's/NAPA or internet?
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  #13  
Old June 22nd, 2004, 20:40
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Re: Bad Coolant Loss

i ave read the aftermarket ones are thinner. i recommend the factory replacement. it meets manufacturers standards as opposed to a repro.
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  #14  
Old June 22nd, 2004, 20:57
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Re: Bad Coolant Loss

Just replace them both, Summit also has one made from aluminum, Eagle did the first one and several others have followed. It uses a standard radiator cap, cost is double the OEM one but will last forever. Other alternative is to convert to an open system. Yes, if it has a crack in it it will leak. Coolant passes thru it when the engine is running... In alot of cases it will boil over as the coolant is not held a pressure so boils out..
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Old June 22nd, 2004, 21:00
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Re: Bad Coolant Loss

if summit has a direct replacement made from aluminum it should be better then the factory, go for it.
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