MudisFun Posted January 19, 2005 Share Posted January 19, 2005 Here's one for yah: Took my 85 GL-10 out for it's first freeway test and it failed. The temp looked to be down below the mid mark for ten miles at 55-65 mph. At about that point I started to hear a radle noise coming from the engine bay, and at first I thought it was the holes in the exhaust so I played with the rpm's to see how it would react. Two more miles the noise increased and so did my temp (almost red). Got of the freeway and saw that coolant was boiling out of the overflow tank. Let her cool down, put about a gallon of fluid back into the system. After starting her up I checked for leaks - found none, thermostat opened just fine so I took the back roads home (35mph tops). Here is a list of the recent work done to the cooling system thermostat water pump fan electrical (is working fine) a few hoses Damn cooling system..... Link to comment Share on other sites More sharing options...
NoahDL88 Posted January 19, 2005 Share Posted January 19, 2005 is the thermostat genuine subaru, and in correctly? Link to comment Share on other sites More sharing options...
MudisFun Posted January 19, 2005 Author Share Posted January 19, 2005 The thermostat is not genuine subaru (napa), but was installed correctly. I have been driving the car for about two month after the repairs with nothing like this happening. All I can think of is the rad cap. Link to comment Share on other sites More sharing options...
MilesFox Posted January 19, 2005 Share Posted January 19, 2005 maybe it just wasnt full enough with coolant after doing the work. butping the last air out can be tricky, it will take a few, top offs to get it full sometimes, wait for the thermo to open and all that Link to comment Share on other sites More sharing options...
TomRhere Posted January 19, 2005 Share Posted January 19, 2005 Not saying it's the problem here... But a blown headgasket can/will cause high-speed overheating, but normal-ish temp at lower speeds. Have a local garage check cooling system for traces of exhaust gasses. Link to comment Share on other sites More sharing options...
rallyruss Posted January 19, 2005 Share Posted January 19, 2005 Not saying it's the problem here... But a blown headgasket can/will cause high-speed overheating, but normal-ish temp at lower speeds. Have a local garage check cooling system for traces of exhaust gasses. yeah I hate to go there... but thats what it souds like to me too. needs to be pressure tested I think as well. Link to comment Share on other sites More sharing options...
idosubaru Posted January 19, 2005 Share Posted January 19, 2005 fill it up, let it idle awhile (keep eye on Temps). check under car, check hoses and look underneath the car and hood for leaks. is your passengers side floorboard wet? heater core leak may not be visible, but you probably would have noticed the coolant in the cabin by now. at cold start check your tail pipe and look for coolant coming out the tailpipe. remove your oil cap, look underneath of it, see any white foamy stuff? Link to comment Share on other sites More sharing options...
idosubaru Posted January 19, 2005 Share Posted January 19, 2005 why did you do all that cooling system work? electric on the fans water pump hoses thermostat sounds like you may have had overheating problems prior to doing all this work. if so, the overheating or running hot may have caused some damage. hopefully not of course but running hot is not good on motors, particularly 15 year old gaskets. Link to comment Share on other sites More sharing options...
MudisFun Posted January 19, 2005 Author Share Posted January 19, 2005 I did all of that work on the cooling system because would would have to be done sooner or later. I want the engine to burn cold so I did take the time to fill the rad correctly, that is the ten minute way. I will go ahead and check the pressure; I that there is no water in the oil and the heater core is sealed. I a week or so I will be able to get close to a dyno with a sniffer and check for exhaust in the system. Thanks for all the help! Iwill let you know what was up. Link to comment Share on other sites More sharing options...
All_talk Posted January 19, 2005 Share Posted January 19, 2005 Overheating on a sustained high speed is typically poor radiator efficiency (assuming its not a bad HG). Get the car up to temp, shut it down and immediately feel the radiator core, it can be tough on A/C equipped cars, you have to reach in and around the fans. Its more important to feel top to bottom than left to right, it should feel consistently warm/hot across the whole face, any cool/cold spots means plugged tubes. Normally radiators plug from the bottom up but the one in my wagon was dead cold except the top and bottom 2 or 3 tubes. Hope that helps Gary Link to comment Share on other sites More sharing options...
MorganM Posted January 19, 2005 Share Posted January 19, 2005 One key part of that cooling system I didnt see on your list.... Radiator. How old is it? What condition is it in? Also track down that noise as it sounds like a piece of this puzzle. Good luck! Link to comment Share on other sites More sharing options...
swiftt Posted January 19, 2005 Share Posted January 19, 2005 I hate to say it but I'm thinking head gasket(s) too. Compression gasses bleed into the cooling system and displace the coolant. Before too long, the coolant level has dropped and the engine heats up. There's a test kit that can be had from Napa and other parts suppliers. It consists of a liquid you add to the coolant system. If exhaust gasses are present, it changes color. Another way to test is with a pressure tester hooked up in place of the radiator cap. With the pressure tester hooked up and the engine running at operating temp, you are hoping to see a constant pressure reading. If the reading fluctuates, typically with a rise in pressure, there is a leak. Good luck. Link to comment Share on other sites More sharing options...
MorganM Posted January 19, 2005 Share Posted January 19, 2005 Enough with the headgasket guesses. Lets rule out some other things first guys. I dont think he's given nearly enough info to diagnose a headgasket over the internet. Lets not scare the guy Link to comment Share on other sites More sharing options...
swiftt Posted January 19, 2005 Share Posted January 19, 2005 Enough with the headgasket guesses. Lets rule out some other things first guys. I dont think he's given nearly enough info to diagnose a headgasket over the internet. Lets not scare the guy If something looks like a pig and smells like a pig, who's going to call it a dog? Why would a headgasket be any more difficult to diagnose than anything else? If that's what the problem is, why waste time hunting up other phantom problems? I share my opinion based on experience, as do others. If he, or you, choose to ignore it then it's on you. If one doesn't want to hear the ideas of others, one shouldn't inquire. Yet, he did. A headgasket is nothing to be scared of. Especially on a Subaru. Easy job! Link to comment Share on other sites More sharing options...
MorganM Posted January 19, 2005 Share Posted January 19, 2005 That's not the point. The point is lets not jump to conclusions like head gaskets. Lets get some more info and then make a more educated diagnosis. Link to comment Share on other sites More sharing options...
rallyruss Posted January 19, 2005 Share Posted January 19, 2005 If something looks like a pig and smells like a pig, who's going to call it a dog? Why would a headgasket be any more difficult to diagnose than anything else? If that's what the problem is, why waste time hunting up other phantom problems? I share my opinion based on experience, as do others. If he, or you, choose to ignore it then it's on you. If one doesn't want to hear the ideas of others, one shouldn't inquire. Yet, he did. A headgasket is nothing to be scared of. Especially on a Subaru. Easy job! my dog looks like a pig kinda smells too. the bad radiator idea is worth checking too. old sube radiators(or any kind really) tend to not coolas well when they are a little pluged, fin rotted ect. I still say pressure test it. any time I have acooling system probelm I pressure test it first. takes less than 5 min. Link to comment Share on other sites More sharing options...
Snowman Posted January 20, 2005 Share Posted January 20, 2005 Any explaination of the rattling noise yet? Link to comment Share on other sites More sharing options...
MudisFun Posted January 20, 2005 Author Share Posted January 20, 2005 The noise was cooling boiling in the coolant res. and playing with the rpm probably didn't help. I just got payed today, so I will drop box my check before work and head to Napa for a pressure tester after work: yah debit card! I will go ahead and test the damn thing behind the store. If the readings are wierd (some more info of wierd results) I will get some testing fluid from them or shucks.Here's something that might or might not be related; most every time I accel there is a spray/gargle noise coming from the center of the inside. I must re state the heater core does not leak I have gotten close enough to notice a leak. Link to comment Share on other sites More sharing options...
rallyruss Posted January 20, 2005 Share Posted January 20, 2005 The noise was cooling boiling in the coolant res. and playing with the rpm probably didn't help. I just got payed today, so I will drop box my check before work and head to Napa for a pressure tester after work: yah debit card! I will go ahead and test the damn thing behind the store. If the readings are wierd (some more info of wierd results) I will get some testing fluid from them or shucks.Here's something that might or might not be related; most every time I accel there is a spray/gargle noise coming from the center of the inside. I must re state the heater core does not leak I have gotten close enough to notice a leak. well I would sa that you hopefully just have some air in the system. oterwise thats when the combustion pressures would be pushing into the cooling system the most. that is of course if you have a leaking head gasket. if you get the pressure tester and do a regular pressure test thats good. another one to consider is leaving the tester conected to the radiator and run the motor. rev it and see if presure climbs. dont let it get to high though. I have fixed the exact same problem you describe before. yeah it was a HG Link to comment Share on other sites More sharing options...
MudisFun Posted January 20, 2005 Author Share Posted January 20, 2005 Well in 24 hours I will find out what it will take... hope it's not the head gasket but for a twenty year old engine I would still love my soobie the same:D Link to comment Share on other sites More sharing options...
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