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Injectors for a Volvo D6D engine

GregsHD

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I ran into this same issue on an EC210B, the owner was thinking injectors also. It had a major boost leak, they have six individual intake manifold gaskets, some of them **** out.

I can't remember if I could see the leaks or not, if you can see down to where the manifold meets the head check for oil residue, may even see a gasket or two hanging out.
 

bchand220

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USA
I would recommend you check and or drain the charge air cooler of any oil. I would also check the injectors for correct orientation. If installed 180 degrees out they will spray outside the chamber in the piston and smoke badly. You could have blown an injector tip off which is not uncommon especially if you have had water in the fuel.
Does the turbo turn freely without contacting the compressor or turbine hosing?

Toy could always pull the injectors from the cylinder head and have them tested at a fuel injection shop. Much cheaper than a set of new injectors.
Yes turbo turns freely without contact. I’ll try these things and post an update soon as possible. Thanks for everyone’s help!
 

uffex

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Good day
The smoke appears more of burnt oil and that of unburnt fuel, those engines that have injector overdose will smell of fuel out the muffler when loaded. I suggest that exploring the possibilities of lube oil getting into the pots is the way to go. If you can of course smell unburnt fuel when loaded would change the idea.
Maybe exploring the previous history might be worthwhile if you are only 200 hours down the road it would sound as if the issue was there when you took ownership.
Kind regards
Uffex
 

southernman13

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Our Ec290BLC was doing that. Ended up being the rubber connector on the bottom of the turbo has slipped off a little. Put it back on and tightened it up. Good to go!
 

funwithfuel

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Our Ec290BLC was doing that. Ended up being the rubber connector on the bottom of the turbo has slipped off a little. Put it back on and tightened it up. Good to go!
Good point, the rigid pipe that the joint hose connects to has a tendency to break loose from the block, verify that that pipe is not swinging in the breeze.
 

Delmer

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If you don't find an obvious leak, there is a procedure for pressure testing the intake system. Basically plug the air filter opening with plastic. Then pressurize the system, it's much easier to find the leak without the engine running! plus you usually don't have much boost at idle, and don't want to be in there at full load!
 

bchand220

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So update...took out injectors and had tested. 1 bad, rest they said weak. Replaced all with new and still smoking. I checked intercooler and piping for leaks with 15psi thru the plug at bottom pipe and holds psi. So took Off turbo and took in to shop and they said it’s in great shape. So, at this point My mechanic and I are stumped. One guy at the turbo shop said he’s seen it take several runtime hours to quit smoking after injectors are replaced or possibly soot buildup in muffler has to burn off. Anyone heard of those possibilities?? Also had someone tell my mechanic that the valves could be issue if dirt somehow got in there thru the air filter. Gonna check those and see in a couple of days.
 

funwithfuel

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Have you verified boost? If so the next step is to Pull the exhaust manifold. Easy peasy. Plug the oil supply to turbo and let her run. If you got one or more holes slobbering oil, might wanna prep to pull the valve cover and run the valves. I doubt it will help, but it can't hurt.
Yes, if you've been dumping fuel , it may take an hour of hard work to clear up the combustion chambers, you need heat and boost. Those mufflers will hold oil, but your turbo is dry, no need to look at muffler. Have you inspected the intake manifold gaskets as suggested. Those little rascals fail quite often. Did you Inspect your preheated element and its insulators? Commonly overlooked fault there.
Good luck
 

uffex

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Good day
One aspect often overlooked is that of the intercooler after a period of time residue can build up - there is a drain plug so that you may easily check it out.
Kind regards
Uffex
 

uffex

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Good day Ivan
Sorry for the Swedish but I guess you can use Babblefish
Kind regards
UffexInj.jpeg
 
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