[diesel_mercedes] Injector Heat Sheilds [4 Attachments]

 

[Attachment(s) from Nate included below]

6.5.16

Sigh ;

Pic. # 1 is three fold : upper right are the damaged and broken heat shields I runied , three have the centers punched out , two are now concave , all are scrap and in the trash now .

Middle right is a set of really clean and good condition early design heat shields from a 1980 W116 .

As I've never seen these before I put them aside in my spare injectors box .

Lower left is the set of five I wound up using , I actually had 9 to choose from three had some pitting on the bottom side that was revealed after I cleaned them , I tossed those in the trash too to prevent the possibility of my using them " temporarily just for now " or other nonsense .

I went to my favorite local Junk Yard this morning (after taking Son,Grand Daughter&DIL out to breakfast) and found more Mercedes diesels than their web site said they have .

Question : what do you do when you have a super clean old Mercedes OM617 engine that doesn't leak and has obviously been worked on not long ago as evidenced by multiple new Dealer parts , clean oil and no sludge inside it ? .

Answer : you yank it out , strip off the injectors and turbocharger then toss it open ports down into some loose sandy dirt like in Pic. # 2 . notice they removed the top of the ALDA device on the recently rebuilt (!$!) injection pump , ruining it .

Make sure to leave behind all five of the brandy new injector heat shields as boob Nate might chance along soon and need some (pic. # 3)

Come home and clean every thing HOSPITAL CLEAN , install all the heat shields and fuel injectors making sure (for once) to use a properly calibrated American made torque wrench and tighten them all up to 75 Lb. Ft. per spec.

Before restarting the engine , take a moment to replace the one air cleaner rubber mount that broke even though you're pretty sure you replaced all three less than a MONTH ago .

As long as the air cleaner and big black "U " tube is off , sick your fingers in to check the accumulation of oil in the intake stream and smile when you see there _isn't_ any , spin the turbo to gauge it's drag and to check the radial and axial free play , groan when you see it's _seized_ in spite of being fine and dandy yesterday when you shut it off .

Grab a tool and try to force it to turn in case it's just bound up or dragging a little bit , be seriously pissed off when you discover it's as tight as a bull's butt in flytime .

Not even freeway speeds and high RPM's will make it spin whatsoever  .

Looks like to - morrow's job is to go back to the Junk Yard and buy the non EGR manifolds I was looking at and find where I stored my spare , non rebuilt turbocharger , tear it all down again and try the spare turbo .

At least the new injectors all seem to work O.K. , no boost means way reduced power but it seems to idle smoothly enough and starts easily .

Pic. # 4 shows the importance of good Supervision .

-Nate

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Attachment(s) from Nate | View attachments on the web

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Posted by: Nate <vwnate1@yahoo.com>

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