Overheating??? Do I have a problem with my head gasket?
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From: LATVIJA - VENTSPILS
Overheating??? Do I have a problem with my head gasket?
Hello i own a 1998 c70 20v T5. and i have this problem ... dunno why the engin seems like owerheating but on dash bord engine temperature seems normal . when i open hood a and look at cooling liquid tank its boiling and all cooling liqiod is coming out seems like presure is to big or what ever . and there seems som oil to mixed with cooling liquid !
have anyone faced this issue ?
thax for your responses ...
send me and email or whatever at gatisp09@gmail.com
thank you
have anyone faced this issue ? thax for your responses ...
send me and email or whatever at gatisp09@gmail.com
thank you
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Joined: Mar 2009
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From: Albuquerque, NM
Hi and welcome to the site.
We are going throught that now with our S70 but don't have any oil mix that we can see.
When a head gasket seal leaks it allows transfer of fluids or GASES to transfer from one system to another. In the early stages the car will NOT over heat but after it gets away from the owner/care giver, it does a lot of damage and the seal gets worse then you'll have overheating. Just my opinion but I think it would be best to get the head gasket repaired when it is leaking a little than when it's leaking a lot (after it gets bad and does head damage, cat damage, etc.).
There is a couple of things people have told me to check before assuming I have a bad head gasket...
1. Make sure the fan in the engine compartment is working. It should come on when you turn on the AC and when the motor gets a little on the hot side.
2. Make sure you have a good cap on the coolant tank.
Other than that, make sure you keep the system filled until you get it fixed so you don't overheat the car. You may go through a gallon of coolant per 2 weeks or so, depending on how much you drive daily. We have been dealing with this for about 6 months, still driving the car daily.
I believe that the total job will be less if you get it fixed while you have a small leak in the gasket. There is a good chance that only normal wear has gone on in the head and when it's sent to the shop for testing and surface check they may not find much wrong with it. Here they check and test the head for $40 and resurface it for $100. When they check it they will let you know if anything else needs to be done to the head, like a valve job or replace old/damaged/worn out lifters. A head job (shop portion) can range from $140 to $600. If you let the car overheat and warp the head it will likely destroy the valve guide seals and then it will need a $250 valve stem job (pre parts) which run the cost up. Intake valves cost $70 each and exhaust valves cost $40 each, so if you have a burnt or cracked valve from overheating the car, it can run the cost up pretty quick. The car has 20 valves (10 intake and 10 exhaust). Yikes!!! A lot of shops won't even do a head gasket job on an older Volvo because the cost to fix the head can get high and the shop that pulled the head don't like the hastle of dealing with the customer who doesn't want to pay $2,800 for the entire job. Cost can exceed the value of the car.
But, if you get it fixed when in the early leaking stages the cost will likely be under $2,000.
The thing about it is that most people don't catch it when it's in this stage, they slowly loose their coolant then the car overheats one day and it's to late. Then they have a warped head and all the "normal" evidance of a blown head gasket. The white smoke, the knocking motor, etc. So talking to someone about it is kinda of a waste of time because they only know about BLOWN head gaskets and not small leaks like we have.
We are going throught that now with our S70 but don't have any oil mix that we can see.
When a head gasket seal leaks it allows transfer of fluids or GASES to transfer from one system to another. In the early stages the car will NOT over heat but after it gets away from the owner/care giver, it does a lot of damage and the seal gets worse then you'll have overheating. Just my opinion but I think it would be best to get the head gasket repaired when it is leaking a little than when it's leaking a lot (after it gets bad and does head damage, cat damage, etc.).
There is a couple of things people have told me to check before assuming I have a bad head gasket...
1. Make sure the fan in the engine compartment is working. It should come on when you turn on the AC and when the motor gets a little on the hot side.
2. Make sure you have a good cap on the coolant tank.
Other than that, make sure you keep the system filled until you get it fixed so you don't overheat the car. You may go through a gallon of coolant per 2 weeks or so, depending on how much you drive daily. We have been dealing with this for about 6 months, still driving the car daily.
I believe that the total job will be less if you get it fixed while you have a small leak in the gasket. There is a good chance that only normal wear has gone on in the head and when it's sent to the shop for testing and surface check they may not find much wrong with it. Here they check and test the head for $40 and resurface it for $100. When they check it they will let you know if anything else needs to be done to the head, like a valve job or replace old/damaged/worn out lifters. A head job (shop portion) can range from $140 to $600. If you let the car overheat and warp the head it will likely destroy the valve guide seals and then it will need a $250 valve stem job (pre parts) which run the cost up. Intake valves cost $70 each and exhaust valves cost $40 each, so if you have a burnt or cracked valve from overheating the car, it can run the cost up pretty quick. The car has 20 valves (10 intake and 10 exhaust). Yikes!!! A lot of shops won't even do a head gasket job on an older Volvo because the cost to fix the head can get high and the shop that pulled the head don't like the hastle of dealing with the customer who doesn't want to pay $2,800 for the entire job. Cost can exceed the value of the car.
But, if you get it fixed when in the early leaking stages the cost will likely be under $2,000.The thing about it is that most people don't catch it when it's in this stage, they slowly loose their coolant then the car overheats one day and it's to late. Then they have a warped head and all the "normal" evidance of a blown head gasket. The white smoke, the knocking motor, etc. So talking to someone about it is kinda of a waste of time because they only know about BLOWN head gaskets and not small leaks like we have.
Last edited by rspi; Jun 22, 2012 at 07:16 AM. Reason: typo
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From: Albuquerque, NM
This is what we are doing to milk the situation.
When the coolant low light comes on (after loosing coolant over the past few days) we add coolant the next time the car is cold. It's not good to remove the coolant tank cap when the car is warm or hot.
Then we drive around until it looses coolant again and causes the light to come back on. Then we refill again when it's cold. We add coolant to show between the min and max mark. We don't fill it to the max mark, to much pressure.
I think we have combustion gases getting into our coolant passages causing the build up of hot gases in the coolant system, thus causing the boil overs in the coolant tank.
When the coolant low light comes on (after loosing coolant over the past few days) we add coolant the next time the car is cold. It's not good to remove the coolant tank cap when the car is warm or hot.
Then we drive around until it looses coolant again and causes the light to come back on. Then we refill again when it's cold. We add coolant to show between the min and max mark. We don't fill it to the max mark, to much pressure.
I think we have combustion gases getting into our coolant passages causing the build up of hot gases in the coolant system, thus causing the boil overs in the coolant tank.
Last edited by rspi; Jun 22, 2012 at 07:21 AM. Reason: add
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From: LATVIJA - VENTSPILS
'
oh thank you a lot .. but i have oil in coolant tank
my father works in garage ower 30 years .. he sais that may be caused by head damage or block damage or head sealing needs to be changed ...
damn and i have this one situation i bought this car 3 days back .. and the last driver has choped of carter ventilation and the end of the pipe (small one) gous up straight to hood and its pumping steam in nowhear.. is it fine or does it nedds to be fixed ?
oh thank you a lot .. but i have oil in coolant tank
my father works in garage ower 30 years .. he sais that may be caused by head damage or block damage or head sealing needs to be changed ...
damn and i have this one situation i bought this car 3 days back .. and the last driver has choped of carter ventilation and the end of the pipe (small one) gous up straight to hood and its pumping steam in nowhear.. is it fine or does it nedds to be fixed ?
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From: LATVIJA - VENTSPILS
and one more thing .. have u heard about theas air intake fans ? it costs like 200$ and there is told that fan spins 20.000rpm .. if i put it on thoes it gives something to me ?
and can u suggest a right blow off valve for c70 20v T5? and maybe u can say whats the best chiptuning is for this car?
Thank you
and can u suggest a right blow off valve for c70 20v T5? and maybe u can say whats the best chiptuning is for this car?
Thank you
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Joined: Mar 2009
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From: Albuquerque, NM
Well, if you have oil in the coolant you need to get your head gasket replaced or whatever damage has already been done to the motor. I wouldn't waste any money even replacing the fuel filter if you have a head gasket issue.
To anyone else reading this post... These 5 cylinder motors are also know to have problems with the coolant reservior tank caps. If the cap is bad, allowing air in, it can cause the coolant to boil over. So, the first thing you should to is replace the coolant tank cap with a green one.
To anyone else reading this post... These 5 cylinder motors are also know to have problems with the coolant reservior tank caps. If the cap is bad, allowing air in, it can cause the coolant to boil over. So, the first thing you should to is replace the coolant tank cap with a green one.
i will try to fix ..and i will post after that 
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I am having simliar issues on a car I just traded for; loss of coolant and then higher temps as coolant gets low. What is strange is that it will go one day and be perfect with what appears to be no loss and then loose alot quickly. I do not have fluid transfer between systems that I have found, no white smoke, and no knock, and no bubbles in the resevoir tank. I got the car basically for free on a trade for service. The previous owner had it overheat twice due to the coolant leak. I suspected head gasket issues, but it has no signs other than coolant loss. The coolant sensor wires are jumped so I suspect a problem has been there that is trying to be covered up to sell it to the PO. I got it from a guy that was screwed by a shop that knew it had problems. It needs alot, but is a nice little car that I think is worth saving. It runs and drives great when the ETM is not screwing up...lol. Has 90K on the engine which was a salvage transplant after the previous engine was overheated and burned up.
The car does have ETM issues and needs O2 sensors as well...trying to get everything done.
Kindof rambling, but just looking for direction. I can do all the work myself, but I dont want to pop the head off if there is some other hidden leaks that I might not be seeing.
The car does have ETM issues and needs O2 sensors as well...trying to get everything done.
Kindof rambling, but just looking for direction. I can do all the work myself, but I dont want to pop the head off if there is some other hidden leaks that I might not be seeing.
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From: LATVIJA - VENTSPILS
Hello time have passed sinc i last visited this forum .. i have worked aout all my isues exept on of them .. the car still have needs to overheat .. cant understand why .. when i drive everithing is ok , but when i stop the collant take owerflows and water comes out from the tank ... why is that so ? maybe my fan isnt working or what ...
cant understand why .. when i drive everithing is ok , but when i stop the collant take owerflows and water comes out from the tank ... why is that so ? maybe my fan isnt working or what ...
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From: LATVIJA - VENTSPILS
Well, if you have oil in the coolant you need to get your head gasket replaced or whatever damage has already been done to the motor. I wouldn't waste any money even replacing the fuel filter if you have a head gasket issue.
To anyone else reading this post... These 5 cylinder motors are also know to have problems with the coolant reservior tank caps. If the cap is bad, allowing air in, it can cause the coolant to boil over. So, the first thing you should to is replace the coolant tank cap with a green one.
To anyone else reading this post... These 5 cylinder motors are also know to have problems with the coolant reservior tank caps. If the cap is bad, allowing air in, it can cause the coolant to boil over. So, the first thing you should to is replace the coolant tank cap with a green one.
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