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Smitty77's avatar
Smitty77
Explorer
Jul 23, 2015

ISL Exhaust Manifold Leak - How far can I drive it?

Have a 2003 ISL370 CAPS engine. Found a 'fresh' small exhausts leak from the manifold gasket of #3. Believe it blew about 700 miles ago, when I heard a new noise climbing a grade on 395. I inspect...
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ScottG's avatar
ScottG
Nomad
Jul 23, 2015
The problem is if it's big enough it will lower the turbo drive pressure and you will over-fuel for a given throttle setting. This results in dangerously high EGT - enough in some cases to damage a piston.
If you have an actual hole I would probably not drive it. If it's just cracked your probably OK but I would stay away from any long steep hill

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