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Cylinder 4 & 6 Misfire 2003 Discovery

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Old Mar 23, 2015 | 10:46 AM
  #21  
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From: Boston Strong
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the head casket could be blown out between 4 & 6?
 
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Old Mar 23, 2015 | 11:13 AM
  #22  
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Overlanding
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From: Asheville, NC
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If that occurred wouldn't i get more issues? i really don't want to go the route of a head gasket. I don't have any smoke out the tailpipe and i have no loss in pressure when pressure testing at the reservoir. how can i check for this?
 
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Old Mar 23, 2015 | 11:15 AM
  #23  
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From: Asheville, NC
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I am going to inspect my ECM tonight to make sure nothing fishy is going on there as well
 
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Old Mar 23, 2015 | 11:18 AM
  #24  
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i'd also like to point out that the previous Owner used regular grade gasoline and the oil i changed was very thin. this could be due to the age of the oil, but my guess is that he used the cheapest oil he could find.
 
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Old Mar 31, 2015 | 02:00 PM
  #25  
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Alright... i decided to do the head job myself! I've ordered all the parts and pieces including new valves and springs. it took about 6 total hours to remove the heads (Using the RAVE). I sent them out to be resurfaced and cleaned, now i'm just waiting to reassemble. in the mean time i'll clean the engine while i've got it apart.

I did indeed have a blown head gasket between cylinders 4 & 6. It looked like i was about to have a blowout between 5 & 7 as well. i had what looked to be four failing exhaust valves and quite a bit of carbon build up in the engine. So definitely glad i'm doing this now than later.

I'll let everyone know the outcome when i reassemble the engine.
 
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Old Apr 1, 2015 | 06:33 AM
  #26  
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From: Boston Strong
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make sure they dont take too much of the heads, they have very little to work with
 
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