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2000 5.9L spark knock

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  #31  
Old 10-26-2009, 08:08 PM
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Champion plugs which are going to have to be replaced regardless now because the tip is gone on #7, entire thing soaked in oil, so those and wires are definitely on the to-do list. #7 cylinder is down to 30 PSI and should be at 150...not sure what the problem is that is causing the lack of compression or how to figure out what the problem is
 
  #32  
Old 10-26-2009, 10:32 PM
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Well there you go, entire thing is soaked in oil. There your compression problem, sound like your seals are going. Leak in the cylinder wil kill that compression, along with causing that misfire
 
  #33  
Old 10-26-2009, 10:50 PM
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A leak down test can tell you more precisely where the leak is coming from, but oil and bad compression might be a bad valve guide seal or worn rings around the pistons

A leak down test is where you push compressed air into the cylinder, and listen to the various spots it could be leaking.

1. bubbles in the radiator/coolant flying out of the radiator fill port, blown headgasket or some other breach into the coolant system. (cracked block or head into the water jacket)

2. hissing at the exhaust pipe, leaky exhaust valve.

3. hissing at the intake/TB, leaky intake valve

4. hissing at the oil dipstick or crankcase breather: bad rings
 
  #34  
Old 10-27-2009, 01:14 PM
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What all do I need to do a leak down test and how do I do it? yup, im a newb who knows just enough to be dangerous *L*
 
  #35  
Old 11-01-2009, 04:28 PM
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I believe the problem has been found...bent exhaust valve on #7 and cylinder head cracks between #3, #5, and #7. Will order new heads for it tomorrow. Thanks to everyone for all the help on finding the issue.
 
  #36  
Old 11-01-2009, 07:41 PM
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Get the EQ heads from www.cylinder-heads.com BAout the same a stock replacements with a small performance bump.

Call and ask for Bob. He'll have a New England accent. Here's an ebay listing for the 2.02 intake valve heads. Get the 1.92 intake heads if you aren't going to cam it.
 



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