Subject	Compression test with no cams will not work
Posted by	ZXoltan on March 18, 2014 at 5:30 PM
	This message has been viewed 295 times.
In Reply To	the lifters might be frozen for those cylinders posted by Zvil (FL) on March 18, 2014 at 01:03 PM
Message	because the intake valves should remain closed, so no way to get air into the cylinder to compress. You want to do a leakdown test instead-- injecting air into the cylinder through the spark plug hole and seeing if it holds pressure. If the engine is rotated such that both valves should be closed (or if you remove the cams entirely) then there should be barely any leakage of air. If your rings are good and there is still substantial air leakage, your valve job is bad. If the leakdown test is good, then there may be an issue with the lifters. During the test you can also listen for escaping air to determine where its coming from (intake/ exhaust/ crankcase). "Foghorn Leghorn" is definitely not the guy to buy an engine from. I hope he does something for you in the way of a refund, but I would not hold my breath waiting for it.
Follow Ups	the "rebuild-engine blues"... :( - theo.laz 18:57:17 03/16/14 Sounds like you were screwed. - Tanley 20:37:52 03/16/14 Re: Sounds like you were screwed. - theo.laz 21:05:35 03/16/14 174 psi is perfect, but even on newly rebuilt engines - Tanley 21:38:24 03/16/14 Re: 174 psi is perfect, but even on newly rebuilt engines - theo.laz 22:32:26 03/16/14 130 psi is acceptable for a rebuilt engine - Stanky 22:37:35 03/16/14 Re: 130 psi is acceptable for a rebuilt engine - theo.laz 03:06:40 03/17/14 You should do a leak down test. You have stock cams. - fuzzymonkey 17:22:59 03/18/14 I really cringe when I hear about stuff like this!! - BarryGZX 23:25:09 03/16/14 Sorry to hear about your troubles - ZXRider 10:36:04 03/17/14 the lifters might be frozen for those cylinders - Zvil (FL) 13:03:36 03/18/14 Re: the lifters might be frozen for those cylinders - theo.laz 14:28:28 03/18/14 sorry to hear it bub (n/m) - Zvil (FL) 14:57:03 03/18/14 Compression test with no cams will not work - ZXoltan 17:30:20 03/18/14 Re: Compression test with no cams will not work - theo.laz 23:24:04 03/18/14 Re: Re: Compression test with no cams will not work - theo.laz 23:28:55 03/18/14 That range is acceptable for race cams, not for you - ttsmokin 13:42:13 03/19/14 Based on this engine builders reputation I would say - Tanley 12:37:25 03/19/14 leak down test my bad (n/m) - Zvil (FL) 15:40:23 03/19/14
Post a Followup	You cannot reply to this message because you are not logged in.