Holset Turbochargers offered by Diamond Diesel and Turbo

Turbochargers By Holset – New and Rebuilt Holset/Cummins Turbos

Turbo FAQ’s

Turbo- Frequently Asked Questions

What are Common Causes of Turbocharger Failure?

  • Contaminated oil
  • Dirty oil
  • Lack of lubrication
  • Low oil pressure
  • Kinks in the oil inlet lines
  • Clogs in the oil inlet line
  • Plugged air cleaners
  • Collapsing hose connections
  • Undersized air pipes
  • Prolonged engine idling
  • Over-fueling
  • Hot engine shut-down
  • Improperly installed gaskets
  • Nuts & washers dropped into exhaust system

How can I Prevent Turbo Failure?

  • Keep clean oil in engine
  • Keep the air filter clean and unrestricted
  • The duct work from the air cleaner should be free of holes
  • The duct work connections should be tight to prevent leaks
  • Warm up the engine for two to five minutes prior to throttling up
  • Let engine idle for approximately 2 minutes prior to engine shut down

What Steps should I take when Installing a Turbocharger?

  1. Pre-installation
    • Service air cleaners and eliminate all restrictions and leaks.
    • BEFORE installing this turbocharger inspect and remove all foreign material from air inlet ducting and intake and exhaust manifolds.
    • Replace all oil pressure and drain lines which are kinked, broken or heat worn. On all automotive turbochargers, the oil inlet line/tube must be replaced. Change engine oil filters if contaminated.
    • Replace all contaminated crankcase and compressor filters.
  2. Installation
    • Mount turbocharger and exhaust manifold using new gasket and anti-seize compound on studs and bolts.
    • Inspect exhaust system. Remove any restrictions which might cause excessive back pressure before connecting to turbocharger.
    • Attach oil inlet line to turbocharger.
    • Align bearing housing drain hole to not more than 30° from vertical center position.
    • Tighten clamps, capscrews or nuts to recommended specifications.
    • Connect air pipage system to turbocharger.
  3. Pre-lubrication
    • BEFORE ATTACHING oil drain line to turbocharger CRANK ENGINE until oil flows from oil drain hole in bearing housing. DO NOT START ENGINE.
    • Attach oil drain line to turbocharger.
  4. Operation
    • Idle engine for 5 minutes. DO NOT REV. Check all systems for oil, air or exhaust leaks.
    • Always have operator IDLE ENGINE for 3 MINUTES PRIOR TO SHUTDOWN for longer turbocharger life

Does Diamond Diesel ship to International Addresses?  

  • Due to increased freight and packaging costs Diamond Diesel only ships turbochargers to addresses within the United States and Canada.

17 comments on “Turbo FAQ’s

  1. Tom - September 22, 2014

    Im looking for a replacement for a 4090053RX

  2. DAS DIESEL - November 9, 2014

    We are BOSCH LIMITED authorized service Dealer . Need your Service centre in Haldia port area.

  3. alejandra - February 5, 2015

    Dear Friends,

    Please I need you to help me with a quote for the following item:

    Part Number: 6742-01-8110
    Description: Turbocharger Assy
    Qty: 1

    This item must be for a Komatsu tractor, the information as follows:

    YEAR: 2005
    SERIE: B-3176
    ENGINE SERIAL: 30505257
    MODEL: SA6D114E-2

    Looking forward for your soon reply.

    Kind regards,


  4. Waleed - March 4, 2015

    Hi there,

    I am looking for a Holset HX40 M turbo 3536621. If available pls quote the price. Regards

  5. Robert - March 4, 2015

    New in-stock 3536620 $1850.00 plus freight core due core charge $300.00 Thank you Diamond

  6. James L Capretti Sr - March 11, 2015

    Can a Holset HE 400 VG turbo leak when placed on end while removed for service work. (turbine shaft on a vertical plane)

    I believe it can leak the oil from the bearing housing to either the compressor side or the turbine side when stood on either end. Should the turbo be replaced for oil leakage of this nature?
    The best way to store the turbo while it is off the engine is horizontally with all openings covered.

  7. Robert - March 11, 2015

    All turbochargers use piston rings to seal shafts this is not a positive seal so yes you can get oil past the ring if the turbo is on its side Thank you

  8. NITIN SHUKLA - April 3, 2015

    how to check the manufacture year of turbo

  9. Robert - April 6, 2015

    We have no way to identify when a turbo was built only by application year

  10. jerry grossman - June 5, 2015

    do you stock new turbos for a 2006 detroit series 60 14 liter 515 hp engine if so how much

    j grossman

  11. Robert - June 5, 2015

    Can you give us a part number ??? Thank you

  12. Earl - August 27, 2015


  13. Robert - August 27, 2015

    can we help you ??

  14. Hussein Abu Habel - November 19, 2015

    could you quote a turbocharger Assy. No. 3599350
    for cummins engine of S.N. H040813170
    To be C&F Medina city of Saudi Arabia Country, by courier.

    Hussein Abu Habel
    Mob. 00962795225580
    e mail: intbrair@yahoo.com

  15. Robert - November 19, 2015

    3599350 holset new $1295.00 plus shipping Thank you

  16. Martin Hope - August 10, 2016

    Do you have a new or rebuilt turbo for a 1989 marine Cummins 6bta 300hp, I think part #3802306?

  17. Robert - August 11, 2016

    Yes we stock a new turbocharger cost $1400.00 Thank you

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