Tech Tip #13: Why Is My Exhaust Manifold Leaking? A Guide To Deutz, Deere, & Perkins Engines

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How to keep your Exhaust Manifold in check

A leaking exhaust manifolds on a Deutz, Perkins, or Deere engine can be annoying. If left alone, this can lead to burst exhaust valves.

Here’s how to stop a leak:

  1. Check the manifold flanges with a straight-edge and a feeler gauge. (You shouldn’t be able to slide a .010 inch feeler gauge under the straight edge.)
  2. Clean and resurface as necessary. (A belt surfacer does a good job.)
  3. Because access to the studs or bolts will be limited, use a high quality performance 12 point socket (with thinner walls). Lower priced imported sockets often have very thick walls making the sockets ineffective for precision work.
  4. To prevent the bolts from loosening, use a high temp silicone sealant like Lock-Tite™.
  5. Tighten in a circular, hop-scotch pattern as you would on a cylinder head. Re-tighten after 10 hours. If working on a torque-to-yield head bolt setup as on a Deutz, we have head bolts available here on our website or you can call us toll free at 800-233-6539 or e-mail us at info@foleyengines.com for any other parts needs or engine questions.  We are different; we want to help!

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