So today got to work and I was given a job to replace valve cover gasket on a 2005 GMC with a duramax diesel. Not really looking forward to do it cause it takes about 6 hours to do.
They guy who owned it wrote down on the paper. He bought the truck last week guy was up front that it had a leak at the lower valve cover and just needed a new gasket.
I get into getting the valve cover off and just before I get to where I can pull it out. I notice around one nozzle are a large amount of stuff that looked like bondo. I finally got the valve cover off to discover it was possibly bondo or some other type of aluminum bonding agent.
I looked at the valve cover gasket and it was defiantly not the problem. No tears or anything in it. I poked at the stuff caked on there and my punch went through it. I flipped it over and discovered something totally unexpected.
They took some type of Pepsi can cut it to size and put it over the hole then used the bonding agent to cover it up.
Here is the top side of the cover
Here is the Pepsi can on the back side the circle hole is where my punch went through it. Toward the bottom u can see psi co, inc at the top you can see Pepsi
So after I discovered this I had to call the owner and break the bad news to him he not only needs a gasket but he needs a lower valve cover also.