Volvo XC70 This wagon/SUV crossover offers the capabilities of an SUV without SUV size.

Oil Under Spark Plug Cover

  #1  
Old 06-25-2010, 12:32 AM
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Default Oil Under Spark Plug Cover

98 V70XC AWD Turbo here with 140K miles on it. I have been trying to solve a problem for some time now. I keep getting oil collecting on top of the engine under the spark plug cover. I cleaned all the oil out and changed the oil filler cap gasket but the oil still came back. Next I completely changed the oil vent system (vent tank, hoses, vacuum line, & cleaned the PTC valve) but the oil is still collecting. I now see where the oil is coming into the area but cannot determine how it is getting in there. Here is a picture of the area. The two white arrows are pointing to the port that the oil is comming from. It is not a pressure leak because it takes a while to fill the port up but once it does fill it will then start to run to the back. If left long enough (20k-30k miles) it the oil flow out each end of the cover (into the timing belt area and off the back of the engine to the turbo area, the two yellow arrow areas). Can anyone tell me what this port is? Is there something missing here? It looks like something should be bolted over the port. It has two bolt holes around the port, and the port opening has a machined area that would accept an o-ring to seal it off. Any help would be appreciated.
 
Attached Thumbnails Oil Under Spark Plug Cover-volvo-head1.jpg   Oil Under Spark Plug Cover-volvo-head.jpg  

Last edited by ajwgator; 06-25-2010 at 12:08 PM.
  #2  
Old 06-25-2010, 12:34 PM
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I believe it is a freeze plug that goes in there, not hard at all.
 
  #3  
Old 06-25-2010, 11:25 PM
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Originally Posted by SVTfocusO3 View Post
I believe it is a freeze plug that goes in there, not hard at all.
Not so sure it has ever had anything in there at all. Take a look at this thread on the same issue on another forum.

http://www.matthewsvolvosite.com/for...hp?f=1&t=30678
 
  #4  
Old 06-26-2010, 08:26 AM
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Well it looks like a tube goes in there, so if you do not have the tube, then there should be a plug that goes in there.
 
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