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 Post subject: overheating geo metro
PostPosted: Sun Sep 08, 2013 4:03 pm 
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Joined: Mon Mar 14, 2011 10:26 pm
Posts: 18
Location: cushing okla
I have a 93 1.0 liter geo metro. I have ben loseing water for a while.I can fill it up drive ten miles and then it starts to overheat.I have replaced the radiator took thermostat out.The coolant fan comes on like it is supposed to.I presssured up each cylinder with 120 lbs psi and looked for bubbles in radiator no bubbles.I pressured radiator to 15 lbs and it held pressure and no water in cylinders.I pulled water pump and looked good no loose impellor or anything.I put one those gas combution in radiator color of solution stayed blue.I have a new pressure cap.It has 160 psi compression just loses water and then it overheats.I got a problem and get drive car very far.IT runs good no white smoke anytime and no leaks.Ii just blows coolant out of overflow and then overheats :buzz: help philrmech


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PostPosted: Mon Sep 09, 2013 1:38 pm 
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Joined: Thu Feb 24, 2011 10:53 pm
Posts: 645
Location: brainerd MN
While I am no expert. I would say that your Head-gasket is toasted. I believe that a crack in the gasket has formed, between the cylinders and the water jacket that is around the cylinders. This would explain the out-flow from the puke tank. Sorry to be the barer of bad tidings.
Also if you replace the gasket, resist temptation to by-pass having the head re-surfaced and checked for cracks. If you have overheated the engine. it will probably be warped or cracked,or both.
DO!!!!!! resist the temptation to rebuild just the top half of your motor. and leave the bottom alone. EVERYTIME!!! I have done that I started pushing oil out the bottom end,(Burning it past the rings)
others on this forum have had better and different results, so your mileage may vary. Good Luck, Jonathan

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PostPosted: Mon Sep 09, 2013 1:59 pm 
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Joined: Mon Mar 14, 2011 10:26 pm
Posts: 18
Location: cushing okla
I think it is probably head gasket or busted head or block.It loses water but not in the overflow just stem in overflow.It has to be getting water and somehow inject it in the exhaust side because there is no white smoke and no leaks. it uses a couple of quarts in 20 miles.Somebody give me sum help I am stumped thanks philrmech :roll: :roll:


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PostPosted: Tue Sep 10, 2013 8:41 pm 
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Joined: Mon Mar 14, 2011 10:26 pm
Posts: 18
Location: cushing okla
could it have a crack in the exhaust valve guides and burning it without white smoke.Help me out here I cannot figure this out. thanks help phil


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PostPosted: Sat Jul 12, 2014 4:19 pm 
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Joined: Mon Jul 22, 2013 5:45 pm
Posts: 13
Location: Kildare, IRE
Hi phil, I have a 1992 Suzuki cultus, I had the very same problem as you.

My car would actually be fine on short journeys just tipping around the town and such. But on motorways it would overheat and dump all the coolant out the expansion tank overflow tube.

I did a co2 test and the liquid stayed blue, removed the thermostat, bypassed the heater matrix, new radiator, radiator cap, water pump etc...

Turned out my cylinder head was pitted and allowing water to pass. The leak was causing an increase in pressure in the cooling system under hard driving conditions and so, dumping the coolant out the overflow.

I got my head skimmed and replaced the gasket and that fixed it.

These engines are very handy to work on, you would remove the head in under an hour.


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PostPosted: Mon Jul 14, 2014 11:40 pm 
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Joined: Thu Jul 20, 2006 7:17 pm
Posts: 1405
Location: Alberta, Canada
If you were very accurate on pressuring up each cylinder, then your head gasket is ok and you have a cracked head. I would pressure each cylinder up one more time and make sure valves are closed , no bubbles In rad. If there are no bubbles, and no external leaks, you are looking at a cracked head or block. This is not a common problem with the g series of Suzuki engine, and really hard to finally pinpoint. I had it happen once, same exact deal as you, no coolant loss anywhere , but it would lose 4L(a gallon) of coolant on a 100km trip. Obviously if I headed out again it would have overheated. I did a head gasket and of course it didn't change as it had held pressure during testing. Never went further with that car, but I'm quite certain it was a cracked head, most likely as you described, leaking and burning coolant right as it left exhaust port, so there was no smell or sign of it going out the pipe.

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