Subject	Either bad rings or valves leaking. Do a leak down >>
Posted by	ZUL8TR on March 15, 2015 at 5:33 AM
	This message has been viewed 189 times.
In Reply To	Looking for feedback on low compression numbers. posted by J-Mart on March 14, 2015 at 09:47 PM
Message	test on #6. I would also test #6 valve sealing at TDC of compression stroke so all the valves there are closed then pressure up that cylinder and listen at the intake for backflow thru the intake plenum. This test usually done with smoke injection and see it out the intake. Perform these tests before any pull apart because that is the real work. ZUL8TR in Orlando,FL
Follow Ups	Looking for feedback on low compression numbers. - J-Mart 21:47:50 03/14/15 How many times did you check the #6 cylinder? - SammybTT(TN) 22:40:57 03/14/15 Cylinder #6 was tested twice in each condition. - J-Mart 23:04:35 03/14/15 I think you next step is the leak down test - SammybTT(TN) 11:50:36 03/15/15 Either bad rings or valves leaking. Do a leak down >> - ZUL8TR 05:33:30 03/15/15 Isn't #6 the one that usually malfunctions the most often? - Zuberman 07:57:53 03/15/15 Yes at rear and cooling is restricted in stock casting (n/m) - ZUL8TR 09:18:20 03/15/15 Do you have a loud lifter tick or a big smoke cloud? - puchy 15:46:01 03/15/15 PO told me it was burning oil and suspected it had low - J-Mart 17:14:25 03/15/15 lifter tick is normal but not when it is rod knock loud, - puchy 07:24:06 03/16/15 I just don't see how adding oil could change the number for - J-Mart 11:46:11 03/16/15 On the off chance it's just a stuck ring. Can try putting - jzack 20:03:28 03/16/15 Can you elaborate some more on what a stuck ring - J-Mart 21:38:49 03/16/15 Stuck ring - this link will explain better. Often happens - jzack 19:32:59 03/17/15 PS - Concern would be a previous owner not keeping - jzack 19:38:27 03/17/15 Interesting. The car is low mileage (70k) but I know that - J-Mart 22:22:11 03/17/15 Alright, leak down test complete. - J-Mart 21:47:07 03/16/15 Re-build..... - Hiram 13:28:23 03/17/15 Green N says you have no clue :-O Needs bottom end rebuild - ZXoltan 14:58:36 03/17/15 So that "rebuild" write-up from TwinTurbo.net's Tech pages - Hiram 16:05:05 03/17/15 This one is more applicable - -Grimm- 16:56:07 03/17/15 Yes, now you are correct...newb with the lowercase "n" - ZXoltan 18:37:31 03/17/15 Re: Yes, now you are correct...newb with the lowercase "n" - Hiram 23:11:07 03/17/15 You guys make a cute couple :) (n/m) - -Grimm- 14:39:41 03/18/15 LOL - ZXoltan 17:10:02 03/18/15 Re: LOL - Hiram 02:32:43 03/19/15
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