TURBOCHARGER TROUBLE SHOOTING CHART

Posted: August 10, 2011 in Turbochargers

Turbocharger Trouble Shooting Chart

Problem

Possible Causes

Solutions*

Leaking or burning oil Plugged oil drain line Clear oil drain line
Worn bearings or bushings Replace worn parts
Bad seals Replace seals
Oil feed line or drain line (external leaks) Replace gaskets or lines as necessary
No or low boost pressure Wastegate stuck Check for free operation of wastegate – replace bad parts
Unit damaged Replace damaged parts or replace unit
Intake system not sealed Check all clamps and ducting from the turbo to the engine
Too much boost pressure (over boost) Wastegate not opening Check for free operation of wastegate – replace bad parts
Wastegate control valve damaged Make sure control valve is operational
Wastegate control diaphragm damaged Replace diaphragm unit
Wastegate too small for application (boost creeping higher as rpm goes up) Replace the wastegate assembly, or the whole unit with one more suited for the engine
Excessive noise under boost Worn bearings or bushings Replace worn parts
Damaged unit Replace damaged parts or replace unit
Intake system not sealed (air noise) Check all clamps and ducting from the turbo to the engine
Excessive turbo lag Worn bearing or bushings Replace worn parts
Damaged unit Replace damaged parts or replace unit
Unit too large for application Replace unit with one more suited for the application
Exhaust restriction Replace bad exhaust parts
Intake system not sealed Check all clamps and ducting form the turbo to the engine
Detonation under boost Too much boost pressure Make sure wastegate and boost pressure bleed is ok
Poor fuel quality Use higher octane fuel
Fuel system not capable of supplying enough fuel (lean mixture) Either upgrade the fuel system or run less boost pressure
Too much timing advance Retard timing under boost
Excessive intake charge heat Run less boost or add an intercooler

Notes

* Some of the solutions will involve disassembly of the turbocharger, if you do not want to attempt disassembling the unit yourself, it is best to send it out to be rebuilt or purchasing a replacement unit (new or rebuilt).
Advertisements
Comments
  1. Michelin says:

    Muy buena información

  2. Michelin says:

    Muy Buena Información, deberían ampliar aun mas la pagina

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s