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Old 03-03-2012, 09:01 AM   #1 (permalink)
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Default overheating help please!!

My parents in law have a 2002 plate grand vitara 2.0 with lpg.

The other day it started over heating. So got it home etc, let it cool down, filled the water up, started it up and left it, and it was fine. As soon as it was driven though it shot up. I drove round the block and it over heated.

So took it to the mechanics, and it didnt do it for 3 days while he had it, he drove it everywhere. Then as he was waiting for a truck to park, it over heated and spat the water out.

He has looked at everything, but he is stumped. He changed the thermostat, but its not helped. One thing though you can smell LPG in the rad when you smell in it when you take the cap off?

He thinks it may be the head, or head gasket, but as its not always over heating, he would say it may not be. He used it for 2 days without anything, then yesterday he started it up drove round the block and it overheated.

Anyone know if this is common on these? i use forums for my own car, so hopefully this will be able to help.


thanks in advance...
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Old 03-03-2012, 09:14 AM   #2 (permalink)
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ive just searched this forum and seen theres a lot about it...

the car overheats as soon as its driven...so any strain and the needle shoots up. even if you sit in it and rev it, the needle goes up.

The mechanic has changed the thermostat, and took the water pump off and he said the pump was ok. think its looking like the head gasket. Could get the whole system flushed and cleand i suppose.
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Old 03-03-2012, 10:18 AM   #3 (permalink)
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Quote:
think its looking like the head gasket. Could get the whole system flushed and cleand i suppose.
Cleaning and flushing won't help the head / block issue, assuming that is what is wrong. Could even make the leak worse! A good block sealer MAY extend the life of the system, but it's not a permanent fix.

You guys DID check the fans, shroud and fan clutch for proper operation, right? That won't solve the LPG in the coolant system probs though.
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Old 03-03-2012, 10:35 AM   #4 (permalink)
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There really is only one explanation for fuel in the cooling system and that is a head gasket leak, or worse, a cracked head or block.
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Old 03-03-2012, 11:28 AM   #5 (permalink)
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Brad. There is a (slim) chance that the act of actual overheating causes a gasketed surface (maybe even a crack) to open up and leak. IF that is the case and you can eliminated the cause of the overheating issue, the leakage could effectively stop. Not a great state of engine condition either way, but something to ponder.

But again, the overheating cause would have to be confined to the area of the fans, fan clutch, lack of fan shroud or a clogged radiator, since you checked the water pump and replaced the thermostat.
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Old 03-03-2012, 12:26 PM   #6 (permalink)
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Wondering why your mechanic did not perform the standard test, compression and leak down.

The results would eliminate or confirm HG issue.... Philip
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Old 03-03-2012, 01:05 PM   #7 (permalink)
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thanks for the replys. The fan etc is working fine, i have been told. So unless i get the rad flushed, they only thimg to test is the HG

I understand that when it heats up it could make a crack worse. The thing that does me is that when we gave it to the mechanic, he drove it arond for 2 or 3 days and it didnt heat up at all. then as he was waiting for a truck, just near his workshop, it over heated. So he left it over night, filled it with water in the morning, and it was then ok for 2 days. The next morning he drove it and it over heated straight away...i hate cars.....


will talk to the mechanic again monday morning


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Old 03-03-2012, 01:46 PM   #8 (permalink)
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Did he at least pressure test the cooling system???? ... Philip
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Old 03-03-2012, 03:22 PM   #9 (permalink)
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And should you find that the radiator is at fault, don't flush the system with hopes of repair. Get a new one. I can buy them all day for just over a $100 bucks here for instance. I don't think that your LP engined Zuke would matter, rad style that is.

Speaking of which....where are you located? Please fill in your location under "User CP" in the header.
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Old 03-08-2012, 06:41 AM   #10 (permalink)
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Right problem solved.

My mechanic was scratching his head, and didnt know what to do. So we gave up and rang suzuki. They said no problem bring it in and we will do a full diagnostic check for 40. So we did and they rang back a few hours later, right we have checked everything and the radiator is blocked. It will be 465 for a new one. So i told them that was too much and we would have to wait. I took the car back to my mechanic and told him. He was adamant the radiator was fine but as suzuki diagnosed this it must be true.....So he quotes 125 for the rad. He changed it and rag up and said its still exactly the same.

What now?

I rang an LPG man near me and explained the gas in the rad etc...and he said to me.....

Have you been to a mechanic?

yes

Did they tell you it may be the head gasket

yes

did they tell you it could also bee the head?

yes

did they change the thermostat/

yes

did they say your rad is blocked and you need a new one?

yes.


He then said " its a common fault on lpgs, when they go wrong the diaphram leaks and seaps gas into the water system.

(Now if i rewind a bit, the day before this problem started, i found an old leak on the water bottle, and tightened it up)

He also said this sometimes causes a leak which lets out the gas so no pressure builds up....Any way itll be 250 to fix it, service the gas filters etc.


I then rang my mechanic friend to let him know, and he told me he had just disconnected the LPG, and it runs perfect on petrol. no over heating, and he checked and the diaphrams gone ( he is no lpg expert )

I told him what i had found out and he agreed thats why he didnt know why it was doing it, as he had ruled out everything else. So its fixed now.

I then drove to suzuki and explained what had happened. One man said well its the computer that told us the rad was blocked. I said ok, but your computer was wrong. The manager then came over and then said no we checled everywhere and they FOUND a blockage in the rad. They were both talking from there behinds, and i made them give me my money back from the diagnostics as it was wrong. I also said, if i had paid for the 400 + radiator from you, what would you do next after it had not fixed the problem? his reply was change the head gasket at 1300...I then said to him, Why? it was a blocked radiator...he then stuttered and i walk out.

I will NEVER use main dealers again.

Anyone with LPG can also use this as an example if they have the same problems!! Thanks everyone for their help.

brad
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