Need help on my Cummins QSD

[Bronson]

Hello everyone, I'm new here on forum and I need your help.
I have a Cummins QSD 2.0L that knock at 1450 -1500 rpm. At the last service, they have completely overhauled the engine, replaced one injector, replaced the camshaft on the valve train, clearance checked the timing gears (all within specs), new head. Still have the same exact noise as before and the men from service said they found no damage in pistons, pins, cannot figure it out.

Somebody told me to use a dish tool to cut out injectors,and if i need to isolate the cylinder that has the knock, it sounds like an injector causing the issue once I can isolate swap the suspected cut injector with another cylinder, all injectors should be changed at time of overhauls. Or I'll risk damage to the overhauls engine. I know that an injector only has a life span of 500,000 miles.

Do you think is too difficult? What you recomend me, to buy the service manual for my truck [TradeBit.Com] and to save money by repairing it myself, or you recommend me to go on a proffesional service and to solve this problem.

Thank you for your attention!

 

[volvopaul]

Hello everyone, I'm new here on forum and I need your help.
I have a Cummins QSD 2.0L that knock at 1450 -1500 rpm. At the last service, they have completely overhauled the engine, replaced one injector, replaced the camshaft on the valve train, clearance checked the timing gears (all within specs), new head. Still have the same exact noise as before and the men from service said they found no damage in pistons, pins, cannot figure it out.

Somebody told me to use a dish tool to cut out injectors,and if i need to isolate the cylinder that has the knock, it sounds like an injector causing the issue once I can isolate swap the suspected cut injector with another cylinder, all injectors should be changed at time of overhauls. Or I'll risk damage to the overhauls engine. I know that an injector only has a life span of 500,000 miles.

Do you think is too difficult? What you recomend me, to buy the service manual for my truck [TradeBit.Com] and to save money by repairing it myself, or you recommend me to go on a proffesional service and to solve this problem.

Thank you for your attention![/QUOTE
Sound an extensive repair I wonder why?
Latestarter on the forum is our cummins expert to answer this for you.

 

[Latestarter1]

Bronson,

I am a little suspicious.

Exact same post elsewhere however stating that engine was a QSD 4.2??

Number 1 what was date in service and how many hours?

Number 2 What was failure mode which required engine overhaul?

Number 3 who told you injectors require changing at overhaul and had life of 500,000 miles??

What Country are you from...............This post smells.

This engine never fitted into a truck under Cummins Mercruiser JV.

Cummins INSITE will not communicate with the this engine to carry out cylinder cut out test, no clue by what you refer to by the term 'dish'.

Base 2 liter QSD engine is a little Korean motor now only supported by Mercruiser distribution.