redghost wrote:
Got the om606 to the shop which was able to get the #5 GP out. Not
mushroomed. REALLY coked up. Seems the idiot dealer (Rasmusson?) who
replaced it did not get it fully seated and it sat up taller in the
head than the rest. This allowed carbon up into the threads and got it
stuck. Really had to crank on it to get it out, but it came out. Plug
is very dead.
Not seating all the plugs is a common failure when plugs are replaced -
not sure why. The OM606s seldom mushroom the way plugs did in older
OM603 and earlier engines. What you report is rather common in OM606s.
ANYWAY, the 606 is direct injection, so no pre chamber. The folks at
Frybrid (Chris Goodwin) are going to try to clean out all the carbon in
the glow plug area when they replace them. The intake is just thick
with carbon, and #5 is about a 1/2 inch thick all around.
Why is this? EGR is dumping a bunch of carbon, but did all this come
about recently? With #5 dead, it has been hard to start and smoking at
start about as bad as Gump....
The OM604/605/606 engines are ALL indirect injection engines! They all
have prechambers. Check the 01-5402HA in the engine manual -
"Removing/installing prechambers."
The EGR does dump carbon back into the intake. If the car is mostly city
driven, that can result in the intake manifold getting REALLY plugged up
in 50-100kmi. Highway driven cars aren't nearly as likely to carbon up
the same way - or at least take FAR longer (200+kmi) before it happens.
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
"der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 182Kmi, '84 190D 2.2 229Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5
turbo 237kmi
