Subject	Would the compression go back up after putting oil in cyl?
Posted by	ZXoltan on February 25, 2020 at 11:53 AM
	This message has been viewed 193 times.
In Reply To	You probably have a slightly bent rod from hydrolock. posted by Bernie (NoVA) on February 25, 2020 at 01:26 AM
Message	If there was a large enough quantity of oil to create significant displacement, I guess it might.... I would try again with only a small amount of oil (just enough to help seal around the rings) and also inject some air into the cylinder through the spark plug hole and see if it is sealing up at the point when the valves should be closed. You might be able to hear where air is leaking from to give you a better clue (e.g., through intake or dipstick hole).
Follow Ups	Got project running, but it has low compression. Need advice - Polishzx 18:34:36 02/24/20 hard to tell in video, but sounds top end to me - Stanky (BC) 20:35:32 02/24/20 Yeah it is tough to pick up, but it is fairly loud - Polishzx 22:27:05 02/24/20 How long was it sitting for? Sounds like lifters to me - itsa300zx 21:16:01 02/24/20 Not for too long, bit over a year. - Polishzx 22:28:29 02/24/20 My opinion is its top end clatter - Cjw3 21:22:09 02/24/20 Yeah, I wasn't sure what it could be - Polishzx 22:38:27 02/24/20 You probably have a slightly bent rod from hydrolock. - Bernie (NoVA) 01:26:49 02/25/20 Would the compression go back up after putting oil in cyl? - ZXoltan 11:53:27 02/25/20 Sub 100psi is typically when you really feel a miss. (n/m) - Bernie (NoVA) 13:38:17 02/25/20 I can try again with a smaller amount of oil - Polishzx 14:01:56 02/25/20 I'll definitely try it, thanks for feedback - Polishzx 14:01:21 02/25/20 Agree. Does sound like bent rod clap. See video in comments - volcomstone550 05:53:04 02/26/20 Based on your diagnostic work (well thought out and - SirpriZ 14:25:23 02/25/20 If its a bent rod you can fix it relatively easy. - volcomstone550 05:59:54 02/26/20
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