How do you check a Duramax boost leak?

Do not put a test plug in the hot side pipe, this takes the y-bridge out of the test loop (a common leak spot). The engine will hold the pressure. If you hear any hissing, find it and you’ll find your boost leak.

How do I know if my turbo boost is leaking?

Simply remove the turbo inlet, attach the boost leak tester, hook the tester up to an air compressor, and allow the system to pressurize. From there, you can listen for leaks, or spray windshield washer fluid on your couplers/vacuum lines and look for bubbles that would indicate leaks.

How do you check for a boost leak on a lb7 Duramax?

Get a 3″ PVC plug from the hardware store, drill and tap for a air fitting, set the regulator on your air compressor to 30psi, plug it in, you’ll find the leak in no time!

How do I know if my turbo is bad on my Duramax?

Signs of a Bad Turbocharger

  1. Too Much Exhaust Smoke. If the casing of your turbocharger cracks or if some internal seals are worn out, it could cause the oil to leak into your exhaust.
  2. Loss of Power.
  3. Increased Oil Consumption.
  4. Loud Siren Noise.
  5. Check Engine Warning Lights.
  6. The Boost Gauge.

What boost leak feels like?

The most common symptoms of a boost leak are loss of power and a check engine light on the dashboard. You can also notice signs like slow turbo spool, poor fuel economy, and black smoke coming from the exhaust pipe during acceleration.

What does a turbo boost leak sound like?

Listen for any hissing noise—this will indicate a boost leak. If the air pressure gauge indicates no buildup of pressure or does not hold for less than a second, that’s a sure sign that a major leak exists within the engine.

What does a diesel boost leak sound like?

Can Boost leak damage turbo?

Going through an automobile boost leak can be challenging. These leaks can damage the entire engine and turbocharger. It is essential to detect and repair the leakage as soon as possible to avoid further damages. You may end up paying higher repairing costs by not treating the issue on time.

How do I know if my Duramax turbo is bad?

How do you diagnose a bad turbo seal?

A smoking exhaust – If the turbo housing has cracked, or the internal seals have blown, oil will start to leak into your exhaust system. As this burns off, it produces a distinctive blue/grey smoke, which will probably become more apparent as the engine revs increase just following an idle situation.

How do I know if my diesel has a boost leak?

Boost Testing your diesel is essential! Every truck that comes in the shop, gets a boost test. Most of the time customers report still seeing peak boost on their gauges despite a boost leak. However, common symptoms of a boost leak include Increased Smoke, Higher EGTs, Excessive Lag, and Loss of Power.

Is it possible to hit peak boost with a leaking turbo?

The reality is that even if you can hit peak boost, you may have a leak, especially if you have a variable vane turbo. Variable vane turbos will change vane position and other operations to try and achieve a desired boost number which may cover up a leak in the charged air system.

How common is it to devlop boost leak?

It is so common to devlop boost leak that we now require all trucks to have a boost test done prior to strapping them down on the dyno. What’s funny, is that no one shows up knowing they had a boost leak.