Injector Problem W124 300TD.

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chastrain

chastrain

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thanks alex, yep "leaking fuel mid length at the join" and yes it's diesel :) as for the compression leak, ok..again the thinking is that it originates from the injector shaft/chamber, now i'm still on the motor curve and am sure you guys are a few times around the block but right next to the hole that's bubbling liquid there's connection for coolant to the rad being pumped around the engine and the liquid that is leaking from the hole is odorless ?

Sam... the re-cutting of the head etc, that sounds like fun for the mech, but what about my pocket and being that the engine is running fine what damage/changes are likely to occur if i left as is .

Pete, thanks , as with hog, yes those return pipes will be changed.

Much thanks :)
 

Alex Crow

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although i pointed out where you said the diesel was coming from, looking at your picture it certainly looks like the leakoff pipes. diesel gets EVERYWHERE and you need to steam clean off, then blast with brake cleaner and an airline to fully degrease the area, then watch CAREFULLY to see exactly where the fluid/s is/are coming from. as i see it you have 1x pre-combustion chamber leak and 1x diesel leak - possibly leakoff pipes. as for your coolant hose, it beats me what you are refering to, another picture with an arrow please as i cannot see it.
 

Number_Cruncher

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As the engine isn't losing any coolant, then, that's the serious worry out of the way.

Fuel leaking from the leak off pipes will tend to flow down the injector and well up at the joint you have indicated. If some baboon has damaged or scratched the leak off barbs on the injectors, you might have trouble getting even brand new pipe to seal properly.

A little compression leakage isn't such a big deal - there's lots of internal leakage past piston rings and valves which doesn't stop the engine running well - the odd bubble or two coming past the pre-chamber won't cause any harm - as AP says, that hole is exacly where you would expect to see pre-chamber leakage. If there weren't already liquid diesel sloshing around from the other leak, you would not be aware of the pre-chamber leak - there would be no bubbles!
 
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chastrain

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thanks Number .. what i'll do then is to get some piping for the injectors and see if the trouble area remains dry, as you say "A little compression leakage isn't such a big deal" so ill just hope that's all it is, though i'm still a little on the lean as to the little hole being something more... Alex, the coolant to?from the head is seen attached in the pic as the bolt directly to the right of the hole/yellow arrow, i know it perhaps doesn't run with form that it would be bubbling water but with the engine running and putting tissue over the leaking hole it came back nicely wet with 'no smell to it'.
Anyway,there's is definitely a need to change the return pipes,then i'll know for sure if it's pre-chamber or something other, i hope for 'no bubbles' Number.

Many thanks .... i'll be back :)
 
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chastrain

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Hi, well...i changed the return pipes (the leak off barbs looked ok) and as told the bubbles are no longer to be seen, obviously the air is still escaping but isn't 'noticeable' as there is no longer diesel leaking from the return pipes.
And as for the compression leakage it seems that the word is not to worry, will keep my eye on it but if it's not likely to worsen greatly will leave alone for now.

again, Many Thanks for all your assistance, Regards C :)
 

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Alex Crow

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thanks for the update chastrain, you took some convincing there!
 
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chastrain

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hey-ho Alex.. at the moment all seems to form but am still not 100% convinced there isn't a diddy water/coolant leak of sort somehow involved, only because as said before the clean rag used to soak up came back sopping and scentless, i reckon my nose to be ok but just in case had a friend take a whiff and got the same result.
Anyway, i'll be doing a 3hr round trip during the week so after will take a look under the bonnet, and if good and dry i'll blame the moon's interference on the liquid phenomenon, otherwise i'll take another pic :)

Cheers .
 
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