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Just finished another oil change. While under the truck, I noticed that there are carbon deposits around where the exhaust manifold mounts to the cylinder head. Not sure, but are there exhaust manifold gaskets used on the 6 litre? If they use gaskets, then I've got a blown one, at least on the passenger side. If not, then how much of this is normal?
Funny you should mention a broken exhaust manifold bolt (rare but happens). My 98 clubwagon van just developed an exhaust leak. When I pulled the engine cover off, I noticed that one of the bolts was snapped off. Wish it was a F-250 rather than a van. There is just no room to work in there. Any suggestions?