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  1. STS Forum - 2005-2012
    Okay guys I hope this is a quick easy question to answer. Im replacing my timing chain and im at the point that i need to remove the valve covers. I remember when i replaced the valve cover gaskets, the driver side valve cover has plenty of room to come off and back on. However the passenger...
  2. Northstar Engines and System Technical Discussion
    I just finished both valve covers today 11/27/21 at 56k miles. When I was having a hard time with the passenger side I decided to do some more searching around on the forum for info and found this post here by Neutrocuted which helped me out a ton although some of his info did not apply to me...
  3. CTS First Generation Forum - 2003-2007
    Trying to replace the valve cover gasket on my 2007 CTS 2.8. I was replacing my ignition coils when I noticed one of them had oil in the spark tube. I removed the plenum. Removed all 3 ignition coils on that side Removed all the bolts around the valve cover But I cannot get it off because the...
  4. STS Forum - 2005-2012
    My wife has a 2005 STS with the Northstar V8. The car started losing a lot of oil, I had a good diagnostic mechanic check it out. Here's what I have: Both valve cover gaskets are leaking small leak at the oil filter adapter PCV valve hose needs to be replaced variable valve timer solenoid needs...
  5. CTS First Generation Forum - 2003-2007
    Initially it started to idol rough. Checked the error code and was a spark plug miss fire at 3. Decided it would be best to replace both coil packs and all six spark plugs. When I pulled up the coil pack the spark plugs were full of oil on both sides. So I figured valve cover gasket. Replaced...
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