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99 S80 Coolant Loss Diagnose

  #1  
Old 10-10-2009, 07:05 PM
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Default 99 S80 Coolant Loss Diagnose

My friend are leaving US, and he would trash the S80 as it has a blown head gasket. I told him I will take care of it. Now I am the owner of it.

Head gasket symptom: Coolant loss due to water came out of tailpipe. Coolant tank smells gas like. Milky engine oil. Miss fire.

I am now trying to use gasket sealer to temporarily fix it. When I was flushing the cooling system, I found the driver side carpet was wet: heater core leakage.

Moreover, the cooling system seems to be under high pressure, the upper radiator hose was hardly to squeeze when engine was running. Is this normal?

I have a 97 850 and been working on it a lot. S80 is a little new to me. Is it similar to fix the heater core as 850?
 
  #2  
Old 10-10-2009, 08:08 PM
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The S80 is a little harder for the heater core.

2 things I can think of
1. Thermostat is stuck.
2. The plastic impellers on the water pump broke and there is no circulation.
 
  #3  
Old 10-10-2009, 09:42 PM
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Originally Posted by tech View Post
The S80 is a little harder for the heater core.

2 things I can think of
1. Thermostat is stuck.
2. The plastic impellers on the water pump broke and there is no circulation.
There is circulation I think. The upper radiator hose can get hot when engine is in normal temp. The water is warm when I drain it after it got normal temp. This also indicates that the thermostat is good.
 
  #4  
Old 10-10-2009, 09:50 PM
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That might only be heat from the motor. It is just a thought I have seen a few broken water pumps and thermostats cause the exact same issue.
 
  #5  
Old 10-10-2009, 09:58 PM
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Originally Posted by tech View Post
That might only be heat from the motor. It is just a thought I have seen a few broken water pumps and thermostats cause the exact same issue.
Yes, I hope if it is due to these things. They are easy to fix!
 
  #6  
Old 10-10-2009, 09:59 PM
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They are not that bad.
 
  #7  
Old 10-11-2009, 11:31 AM
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Progress:
Check the spark plug holes. I can see water in No.4. Oil filled No.6.

For heater core, I just bypass it right now. Cut the hoses and connect them.

Tech, how to disable fuel injector in S80? Just unplug the attached electrical switches?
 

Last edited by stojakovic; 10-11-2009 at 11:53 AM.
  #8  
Old 10-11-2009, 05:11 PM
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Why do you wan them to not work?
 
  #9  
Old 10-11-2009, 07:05 PM
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Originally Posted by tech View Post
Why do you wan them to not work?
While I checked the spark plugs, I found water in No.4 cylinder and oil in No.6.

Disable the No.4 injector will allow the gasket/block sealer to work. Let it fire will keep sealer from passing through the holes due to combustion gas pressure.

Am I right?
 
  #10  
Old 10-11-2009, 07:26 PM
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Not sure I do not use that stuff. You can just unplug the injector if you want.
 
  #11  
Old 10-11-2009, 08:36 PM
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Where can I find replacement hoses that go to the heater core?
 
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