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Old 03-29-2008, 10:53 PM   #1
Godzuki
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Default i have a 98 LGT

and im having some problems with coolant. here is what i know. it will at some point for no reason i can think of start blowing out coolant up near the fill cap. here is what i have looked at so far. we just bought this car yesterday and we had a prebuying instection done on it, damn it. well on the way home from where we bought it (columbus OH, we live in kalamazoo MI) we stopped at a rest area to relive, with my wife following me in our forester. well i am sitting there and i happen to look at the temp gauge and its running right up, i kill the motor before it hits the H we few lines below it. so i wait for awhile and check the radiator and its missing some fluid so i fill with some water., i check the overflow bottle which is right next to it and the water is well brown ish and foamy. we stopped 2 more times on the way home to fill the fluid, well today i wash the motor off then let it dry and then fired it back up and let it idle, well i let it idle for 1hr and it never heated up not once so i take it for a spin around the block and yep on lap 2 there it goes, so i shut it down and cost off to the side and same thing getting up near the top in temp, and the engin on the left side near the fill cap is all coated with more coolant. so here is some more.

1. no water in the oil
2. not blowing white smoke
3. the cooling fans do come on.

my guess right now is either a worn out radiator cap, or a stuck thermostat. if anybody has any kinda ideal of what or where i should look it would help
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Old 03-29-2008, 11:59 PM   #2
gtwagon941
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Bubble in the coolant lines?

It is the easy guess on these engines, but HGs have to be a concern, especially since the coolant is discolored.

Good luck.

JS
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Old 03-30-2008, 12:15 AM   #3
legacy99black
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HG is my guess, getting air locked.

Belt on water pump is a maybe, or the pump itself, but I still go with my first guess.

Sorry to hear this man.
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Old 03-30-2008, 03:59 AM   #4
Kawikid20o2
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HG im positive, you had the same signs i did to a T. Also when you are over heating, you are supposed to continue to idle untill you see the temp stop rising or actually come down. The temp will actually rise with the engine off because the coolant is not circulating anymore.

~Justin
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Old 03-30-2008, 10:08 AM   #5
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X10 for the HG being the culprit.
Buying these phase I ej25's are risky.
If you don't know if the HG have ever been replaced, or how well the car was previously cared for, it could go at any moment.
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Old 03-30-2008, 04:15 PM   #6
Godzuki
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damn it, i didnt want to hear that. i was thinking since there is no water in the oil and its not blowing white smoke out the back, it shouldnt be the HG, damn it damn it damn it. i tried the radiator cap today for sh_t's, but no luck there the one that was on the radiator was a .9 the one i got from the parts store was a 13 i though well that right there could verywell be it, but after a short test drive of it the problem came back.

i let this think idle for at least a hr yesterday with noproblems then i got it to rev around 2k for about a 1/2hr aswell and it still didnt have a problem. its not until i actually start driving that it happends.

on the head gasket if i get it pressure tested will it show during that.
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Old 03-30-2008, 06:10 PM   #7
suby2low
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the .9 on the first rad cap meant .9 bar. the 13 on the second cap means 13 psi, which come out to the same pressure. just fyi for the future. definate signs of bad HG.
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Old 03-30-2008, 06:37 PM   #8
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Quote:
Originally Posted by Godzuki View Post
damn it, i didnt want to hear that. i was thinking since there is no water in the oil and its not blowing white smoke out the back, it shouldnt be the HG, damn it damn it damn it. i tried the radiator cap today for sh_t's, but no luck there the one that was on the radiator was a .9 the one i got from the parts store was a 13 i though well that right there could verywell be it, but after a short test drive of it the problem came back.

i let this think idle for at least a hr yesterday with noproblems then i got it to rev around 2k for about a 1/2hr aswell and it still didnt have a problem. its not until i actually start driving that it happends.

on the head gasket if i get it pressure tested will it show during that.
Yea there is this part on the gasket that just gets burned up and begins to leak combustion gases into the cooling system. Its a special internal leak that doesn't involve mixing of the coolant with the oil. The discoloring and foaming in the coolant is the proof of the presence of leaking combustion gases and Carbon deposits. The reason why it doesn't overheat on idle is because there is no load on the engine, driving however is a completely different story.

My car was at a Midas and they could not determine the problem and thought it was just air in the system. Then they had a guy come from subaru and he was able to find the leak for sure.

~justin
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Old 03-30-2008, 09:44 PM   #9
ballitch
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It sounds like a HG, but a bad thermostat or air in the system could give the same problems. HG's on these motors arent that hard, if you can do them yourself. I would buy a new thermostat, and have the coolant replaced when you do it.


~Josh~
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Old 03-31-2008, 02:13 AM   #10
Godzuki
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now if the midas thing isnt ironic i dont know what is. they checked the car out before we bought it and said yep everything is fine.


so anybody in michigan looking to make a buck or 2 doing a side job replacing some HG's.

truely i might if i had the time, i have a almost 6 month old daughter and my and my wifes first child i am learning a whole new ball game here. plus my wife and i both work opposite shift's, so i realy just plain have no time as i whatch the little one till i head out for work then i drop her off at day care.

if nobody on here is close or interested i have another question, about how much am i going to get bent over for having a shop do this.
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Old 03-31-2008, 02:19 AM   #11
MeanEditor
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My buddy just had a general service shop do his HG and it was $1,500. You have to pull the engine, strip it down to more or less a bare block, take the heads off, resurface the heads, reinstall the headgaskets, probably need new studs as well (Subaru says they can be reused, but I wouldn't) reassemble, reinstall everything, drop engine back in. It's about 10-12 hours labor, plus parts. While they are in there you might as well check thinkgs like the clutch, main seals, change timing belt, cam seals, new tensioner, water pump... But the good news is, after all that you are good for another 100k miles or so since you will have the upgraded headgaskets.
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Old 03-31-2008, 08:25 AM   #12
Godzuki
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well then thats not much diifferent than my truck i just had to have it done on 2 months ago. i guess once where done with it not only with the drive train be good but the car is spotless inside and out, i mean out of all the cars we looked at, this one easy was the nicest. the basterd thing is it was a old man and women that sold it to us, and i know they had to have known this was happening. we bought it in colubus OH and drove it back to kalamazoo MI, before we even got id say 50 miles out though is when i noticed the problem.

well the offer is still out there if anybody on here wants to make a buck doing a side job.

ohh and will the pressure test show the leaking head gaskets
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Old 03-31-2008, 09:35 AM   #13
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Quote:
Originally Posted by MeanEditor View Post
My buddy just had a general service shop do his HG and it was $1,500. You have to pull the engine, strip it down to more or less a bare block, take the heads off, resurface the heads, reinstall the headgaskets, probably need new studs as well (Subaru says they can be reused, but I wouldn't) reassemble, reinstall everything, drop engine back in. It's about 10-12 hours labor, plus parts. While they are in there you might as well check thinkgs like the clutch, main seals, change timing belt, cam seals, new tensioner, water pump... But the good news is, after all that you are good for another 100k miles or so since you will have the upgraded headgaskets.
Spot on, replacing stuff like that while your in there will save money in the long run.
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Old 03-31-2008, 10:41 AM   #14
Kawikid20o2
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Quote:
Originally Posted by Godzuki View Post
now if the midas thing isnt ironic i dont know what is. they checked the car out before we bought it and said yep everything is fine.


so anybody in michigan looking to make a buck or 2 doing a side job replacing some HG's.

truely i might if i had the time, i have a almost 6 month old daughter and my and my wifes first child i am learning a whole new ball game here. plus my wife and i both work opposite shift's, so i realy just plain have no time as i whatch the little one till i head out for work then i drop her off at day care.

if nobody on here is close or interested i have another question, about how much am i going to get bent over for having a shop do this.

HAHA oh midas! that is ironic. BTW they wanted 3 Grand to do the job too.
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Old 03-31-2008, 11:31 AM   #15
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Quote:
Originally Posted by Kawikid20o2 View Post
HAHA oh midas! that is ironic. BTW they wanted 3 Grand to do the job too.
Big chain auto shops FTL.
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Old 04-01-2008, 12:05 AM   #16
dplacen
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As other people have said. Looks like you will need the HG dones. This happend to me with another GT I had and sold. As I drove it home it started to over heat.
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Old 04-01-2008, 01:23 AM   #17
ballitch
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You can do this yourself, grab a Haynes or chiltons manual (mostly for toilet paper) and use the search feature here to answer any questions you might have. If you are even slightly mechanically inclined you can do this. Take stuff apart, replace bad parts, and re-assemble. It would just eat up your weekend.


~Josh~
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Old 04-01-2008, 02:08 AM   #18
99LegacyGT
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Godzuki,

I have the same problem with my 99 GT.
I've had this car since it had 4K miles, now, it has 100K.
a lot of hard driving on my part, love my Legacy GT !
I've been holding on to do the job myself, I am quite busy with my other projects but I am getting close to doing it. removing the engine and replacing the HG, water pump, belts, clutch, etc. should be a new experience for me with Subarus.

I've done a lot of stuff with Chevys and Fords but not much with Subbies.
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Old 04-10-2008, 06:36 PM   #19
GTkrockett
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I'm on my 3rd set of HGs, hopefully the last. Watch it blow tonight driving home.
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Old 04-11-2008, 01:45 AM   #20
rocket3004
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sent you a pm
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Old 04-15-2008, 12:48 AM   #21
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Quote:
Originally Posted by GTkrockett View Post
I'm on my 3rd set of HGs, hopefully the last. Watch it blow tonight driving home.
If you're on your 3rd set, something is wrong. I'm a Certified Subaru Tech and done properly a new set of gaskets should last at least as long as the originals. Have you been doing them yourself or has a shop been doing the repair? If they keep failing you may have a crack in the head or the liner in the block.

Things that MUST be done when doing headgaskets or the will fail again.

- Both surfaces (head and deck) must be completely scraped clean of all remaining material from the old gaskets

- Both surfaces must be checked with a true-bar for warpage. The warpage limit per Subaru service manuals is .002". This means if any feeler gauge thicker then .002" passes between the true-bar and head/deck at any point, the surface must be machined. In my experience, the heads may warp from overheating, but I have not seen a warped deck. Usually the cylinder liner cracks. If the head is warped it may be ground by a machine shop to be trued up. The grinding limit is .011". Anything more then this and you will have valve to piston clearance issues.

- The head must be torqued properly to Subaru standards.

I swear I must've done about 100 sets of head gaskets over the last couple years, none of them have ever come back to me leaking.
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