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  #1  
Old 06-12-2017, 01:44 PM
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burned oil in pre chamber,

Dear all

Had diesel leak from Cylinder #5 300SDL,

found burned oil in pre chamber, and on the injector,

about to check compression,

getting new pre chamber and seals tomorrow,

will keep posting,

thanks any which way,
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  #2  
Old 06-12-2017, 06:17 PM
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I'd suspect that the heat shield washer was missing, installed incorrectly, or reused from a previous installation OR the injector was loose to cause that kind of buildup. Clean out the carbon, install a new heat shield washer, and see if you still have leaks.
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'11 Honda Accord EX - "The Daily" 60K
'83 500SL Euro - "The Money Pit" 116K
'86 300SDL - "The Diseasel" 184K
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  #3  
Old 06-12-2017, 06:49 PM
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compression test, 320 PSI,

Did change the hard line tube+ colar nut,

it stop leaking diesel, for now,

heat shield washer was new,

new nazel, tested,adjasted to 2000psi pop,

all torque to specs,

still nock at ideal,

DV check next,

or oil passage is not full open????

thanks for the response ,
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  #4  
Old 06-12-2017, 06:57 PM
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320 PSI on the compression test isn't spectacular, but it won't cause that kind of buildup in the prechamber opening. That came from the heat shield washer not being seated or something leaking down from above. There isn't any oil passageway involved with the prechambers.
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'11 Honda Accord EX - "The Daily" 60K
'83 500SL Euro - "The Money Pit" 116K
'86 300SDL - "The Diseasel" 184K
The Diseasel Thread - Everything You Didn't Know You Wanted To Know
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  #5  
Old 06-12-2017, 08:55 PM
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might be burnt diesel, not oil,

I might be wrong seeing the black residue as burnt oil,

could be bund diesel, sipping out,

thanks for replying ,

will check in coming days the compression of the rest of the cylinders ,

110,000 miles ago it was around 500 psi,

will check and report,
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  #6  
Old 06-12-2017, 08:58 PM
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I was looking for oil passage to the valves,(new hydraulic tappets)

nock only in idle, bit more rpm, nock is gone,

or poor diesel delivery, at idle,
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  #7  
Old 06-13-2017, 12:15 AM
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Look up videos on Youtube of diesel injectors "nailing" and see if that's what you have going on. If you have new tappets and the oil pressure is ok, you're probably nailing which is fairly common. Take the oil filler cap off and look down in the valve cover. If oil is flinging around everywhere off the cam, you have oil pressure to the top end.
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'11 Honda Accord EX - "The Daily" 60K
'83 500SL Euro - "The Money Pit" 116K
'86 300SDL - "The Diseasel" 184K
The Diseasel Thread - Everything You Didn't Know You Wanted To Know
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  #8  
Old 06-13-2017, 12:22 AM
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Thanks for kind reply,

oil pressure is ok,

oil sprinkle when oil filler cap is off,

when cracking off #5 cylinder , nailing or nocking is off,

only at idle,
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  #9  
Old 06-13-2017, 12:24 AM
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If you had problems with the valve train or tappets, the noise wouldn't stop when you crack the injector line. Your low compression in that cylinder CAN cause nailing though, especially if the rest of the cylinders are relatively high in comparison.
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'11 Honda Accord EX - "The Daily" 60K
'83 500SL Euro - "The Money Pit" 116K
'86 300SDL - "The Diseasel" 184K
The Diseasel Thread - Everything You Didn't Know You Wanted To Know
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  #10  
Old 06-13-2017, 12:24 AM
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got the seals for DV,

will change them in two three days,

will inform,

thanks
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  #11  
Old 06-13-2017, 12:26 AM
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you probably right,

Quote:
Originally Posted by Diseasel300 View Post
If you had problems with the valve train or tappets, the noise wouldn't stop when you crack the injector line. Your low compression in that cylinder CAN cause nailing though, especially if the rest of the cylinders are relatively high in comparison.
That is what I am concern,

will gather the facts,

thanks
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