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Old 01-26-2013, 10:42 PM   #1
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Exhaust leak fixed, should I also....

1993 Cummings 300hp. I had a gasket exhaust leak, found out the my manifold is warped in cylinder #2, installing a new exhaust manifold. What would cause this gasket and manifold to go bad, is it inherent of the type of motor and year. Or would a leaking CAC be the issue, we did a bubble test on the CAC and it did have some small bubbles foaming up, but did not appear too bad, but I am not sure how bad is too bad. I have heard leaking CAC could cause a heat build up which could cause a manifold to fail. Should I replace the CAC, or not worry about if it is not leaking too bad.
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Old 01-27-2013, 11:54 PM   #2
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Manifold issues, depending on the heat that the are exposed to, are common on these engines. Seems that #1&2 clys are the worst, maybe because they would cool the fastest due to distance from the turbo.
Replaced a few on 5.9 P/Us , you know it's a common problem , when the dealer has one in stock.
See that several aftermarket companies offer them for the trucks , not sure about M/H applications.
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Old 02-03-2013, 06:36 PM   #3
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Yep, installing a new CAC, no pressure.
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