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Oil Leak Exhaust Manifold


stanisicb
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Hello everybody I was wondering if anyone can help me out. I have a 2004 mack granit 460 today I opened the hood to check the oil anyways i noticed slight oil leak coming from exhaust manifold where it bolts on the motor. It doesnt make sence to me so i was wondering if anyone can help me out.

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The bottom exhaust manifold bolt holes in the heads are drilled all the way into the push tube opening. Oil runs down the push tube to the lifter, the oil stays there and can come out past the lower exhaust manifold stud. We remove the bottom studs and put silicone/RVT on the threads (threads of the stud only)on the stud and reinstall. It's a common problem . All ETECH style engines are like this.

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The bottom exhaust manifold bolt holes in the heads are drilled all the way into the push tube opening. Oil runs down the push tube to the lifter, the oil stays there and can come out past the lower exhaust manifold stud. We remove the bottom studs and put silicone/RVT on the threads (threads of the stud only)on the stud and reinstall. It's a common problem . All ETECH style engines are like this.

Thank you very much for your help.

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