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08-22-2014, 05:37 AM | #21 |
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Re: Tell me this noise isn't what I'm afraid it is.
Might be apples and oranges here, but 30 some odd years ago I had a similar sound in '66 Chevy straight six. Turned out it was chipped tooth on timing gear. Might be easier fix than a rod.
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08-22-2014, 08:36 AM | #22 |
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Re: Tell me this noise isn't what I'm afraid it is.
It does sound bad.
I wouldn't run it too much. I might just run it shortly without any belts connected just to rule anything external out, but it does sound deep in the motor to me. Time to pull the motor down again by the sound of it. (Sorry to say). Mart. |
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08-22-2014, 09:10 AM | #23 |
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Re: Tell me this noise isn't what I'm afraid it is.
This is a real long shot but maybe a loose crankshaft pulley? A few years back, mine was making a very similar noise and it was the crankshaft pulley.
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08-22-2014, 09:25 AM | #24 |
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Re: Tell me this noise isn't what I'm afraid it is.
When the engine is cold does it knock immediately after starting or after it runs for a bit?
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08-22-2014, 09:27 AM | #25 |
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Re: Tell me this noise isn't what I'm afraid it is.
Remember the original post. How could a crankshaft pulley cause "just barely able to run"? I think that girl at Jiffy Lube may have over-tightened the Johnson rod. DD
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08-22-2014, 09:30 AM | #26 |
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Re: Tell me this noise isn't what I'm afraid it is.
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08-22-2014, 10:04 AM | #27 |
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Re: Tell me this noise isn't what I'm afraid it is.
this is what I would try first...anything mechanical can be repaired...
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08-22-2014, 11:13 AM | #28 |
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Re: Tell me this noise isn't what I'm afraid it is.
I'll offer a WAG... based on events as they happened on my own 47...
burned piston(s). I had problems with pre-ignition/pinging, and eventually found three pistons with holes on top, at edge, down into the ring-lands. With heads off, easy to see on top of pistons. Oh, the fun |
08-22-2014, 11:32 AM | #29 | |||
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Re: Tell me this noise isn't what I'm afraid it is.
Quote:
Quote:
Quote:
How do I "massage the pistons for bearing and wristpin issues?"
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Prof. Henry (The Roaming Gnome) "It is good to have an end to journey toward; but it is the journey that matters, in the end.” *Ursula K. Le Guin in The Left Hand of Darkness Last edited by Old Henry; 08-22-2014 at 11:43 AM. |
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08-22-2014, 11:40 AM | #30 | |
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Re: Tell me this noise isn't what I'm afraid it is.
Quote:
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08-22-2014, 11:47 AM | #31 |
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Re: Tell me this noise isn't what I'm afraid it is.
Well that sucks... Maybe talk to Walt about building you an engine over the winter for round 2?
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08-22-2014, 12:31 PM | #32 | |
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Re: Tell me this noise isn't what I'm afraid it is.
Quote:
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08-22-2014, 12:39 PM | #33 |
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Re: Tell me this noise isn't what I'm afraid it is.
I had rebuilt it myself because it was seeping gas when I parked it in the garage at night and stinking up the garage. I also thought it might be part of the missing problem I had. After I rebuilt it, including replacing the power valve, it wouldn't hold gas after parked at night and I had to fill it with my electric pump every morning and choke it to start it. The engine didn't run any better either. So, I decided to put the Stromberg back in and see if it did any better.
I had Uncle Max rebuild my 97 but he left the .44 jets in thinking they were OK at my elevation of 5,000 feet. Maybe they were and that has nothing to do with anything but the plugs looked a little lean to me so I put bigger ones in. Didn't help the noise.
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08-22-2014, 12:41 PM | #34 |
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Re: Tell me this noise isn't what I'm afraid it is.
I just tried removing a spark plug to see if that made any difference, planning on removing one at a time to try to identify the offending piston. Unfortunately, the noise from the air rushing in and out of the spark plug hole drowned out all other sounds and I couldn't hear anything else.
Other ideas to identify the bad piston?
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08-22-2014, 12:55 PM | #35 |
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Re: Tell me this noise isn't what I'm afraid it is.
I would do a compression check.
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08-22-2014, 04:20 PM | #36 |
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Re: Tell me this noise isn't what I'm afraid it is.
>>>I just tried removing a spark plug >>>
Do all the plugs looks the same now? Tan, white, black, wet, etc? Jack E/NJ |
08-22-2014, 04:28 PM | #37 |
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Re: Tell me this noise isn't what I'm afraid it is.
Prof, try removing the lead, rather than the plug.
Mart. |
08-22-2014, 05:08 PM | #38 |
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Re: Tell me this noise isn't what I'm afraid it is.
My thoughts since there is a noise and poor engine performance, it will require pulling a head off and see what's going on.
I can't see (in my mind) how changing jets, adding more choke, etc, would reduce a bearing/wristpin noise. |
08-22-2014, 05:21 PM | #39 |
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Re: Tell me this noise isn't what I'm afraid it is.
Henry, there are six pistons that will come out the bottom of the engine with out pulling the head, I have done that when one of my pistons burnt a hole in itself, I cant remember which ones that can come out, been a lot of yrs, the hard part is collapsing the rings one at a time to get the piston back in the bore
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08-23-2014, 02:17 PM | #40 | |
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Re: Tell me this noise isn't what I'm afraid it is.
Just checked compression and got:
1-72 2-78 3-72 4-68 5-75 6-80 7-74 8-74 Does that tell you anything? It doesn't me. Quote:
Did that. Didn't make any difference. Any more ideas?
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