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#1
02-22-2003, 11:34 AM
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Injector Seal Ring burnt through pics link
Gentleman,
I am in need of experience and expertise... Can someone tell what might have gone wrong here? Or hypothesize such that I can try to figure out what is going on? As always, I am deeply indebted and humbled by the knowledge of those in the profession. http://www.peachparts.com/shopforum/showthread.php?threadid=57887
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'99 S420 - Mommies '72 280SE 4.5 - looking to breathe life into it '84 300SD Grey - Sold '85 300SD Silver - Sold '78 Ski Nautique 
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#2
02-22-2003, 11:52 AM
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looks to me like either the injector face is trenched or the prechamber face is trenched.
(or you did a joe and under torqued it) Joe
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Project Smoker, '87 603 powered wagon Hauler, 96 CTD can you say torque? Toy 73 Cougar xr7 convertible Acme Automotive Inc. Raleigh NC 919-881-0364
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#3
02-22-2003, 12:43 PM
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The crush seemed good in that the center ring is forced downa dn when I compare it onthe bench it looks like it had a good seal.
torque value was 54 or 57 ft lbs. Can't remember at the moment. Which I think is correct according to Haynes. Could a "trenched" prechamber cause a slight miss? this is my symptom and I have been trying a lot of things to correct this problem. I also used about a quart of oil ove the 550 miles with a motor that compression checked at 345 to 360 psi in all 5 holes. I'm thinking valve stem seals for fixing this... As you can tell I'm grasping at straws here!  I'm about ready to try a different IP and see if this will fix it but I only have access to a 1985 MW pump and this is a 1980. Should that be a problem though? The pump looks identical in all respects. I also have access to a 1979 M-RSF pump but it does not have the vacuum bleed mount on it. Would this matter for testing? I don't know why I am obsessed with the pump as the root of this problem other than it seems I have done just about everything else to try to isolate it.
__________________
'99 S420 - Mommies '72 280SE 4.5 - looking to breathe life into it '84 300SD Grey - Sold '85 300SD Silver - Sold '78 Ski Nautique
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#4
02-22-2003, 09:07 PM
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Anyone ever actually seen this problem before?
__________________
'99 S420 - Mommies '72 280SE 4.5 - looking to breathe life into it '84 300SD Grey - Sold '85 300SD Silver - Sold '78 Ski Nautique
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