asmith
Full Access Member
This is my question too. Do you know for a fact there was zero compression in that cylinder, or it just sounded like it?What lead you to the conclusion there was 0 compression in one cylinder when you first cranked it?
This is my question too. Do you know for a fact there was zero compression in that cylinder, or it just sounded like it?What lead you to the conclusion there was 0 compression in one cylinder when you first cranked it?
I'm guessing that it sounded like it which is why I mentioned low compression along with no compression.Do you know for a fact there was zero compression in that cylinder, or it just sounded like it?
Have you ever heard the noise these will make with a bled down exhaust lifter, or exhaust valve not opening for whatever reason? It is a fairly loud noise that I have heard described as knocking many times. Sound varies anywhere from a pretty low pitched thump thump sound to higher pitched pop pop sound......but it is pretty loud.Also, I don't understand how the engine would run good after it had just knocked like crazy. I don't understand what could've changed. I shut it off again after it was running good and I went to start it like an hour later and knocked, shut it off, turned it back on again and it ran fine. It really confuses me
Wouldn't that be completely random though? I don't see any way it would stop bouncing around on the piston after being shut off and restarted.Another thing that could knock and then go away is a lost glow plug tip.......
Also, I don't understand how the engine would run good after it had just knocked like crazy. I don't understand what could've changed. I shut it off again after it was running good and I went to start it like an hour later and knocked, shut it off, turned it back on again and it ran fine. It really confuses me
I haven't heard the noise, but after reading both of these posts, I'm still leaning toward Black dawg's diagnosis and thinking that it's a bad lifter. That would also describe the temporary sounding like a loss of compression.Have you ever heard the noise these will make with a bled down exhaust lifter, or exhaust valve not opening for whatever reason? It is a fairly loud noise that I have heard described as knocking many times. Sound varies anywhere from a pretty low pitched thump thump sound to higher pitched pop pop sound......but it is pretty loud.
Did you actually check for low compression? I think you're getting hooked on the idea that it might have had low compression, which isn't a fact yet.But that doesn't explain the weird compression issue, I dodon'understand how that can happen and then go away
True, but I think that something else probably would have been bent or broken if this happened. If that had happened, then it wouldn't run right after a second start.This means that if the valve was hit by the piston, there is a chance it may not have bent the valve and simply been slammed straight up against the valve seat in the head.