Re: Troubleshoot Loud Ticking 2498 288 Ultramatic
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I have uploaded a zip file of an mp4 video with audio of the vacuum, tach and click sound.
Posted on: 12/27 21:21
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Re: Troubleshoot Loud Ticking 2498 288 Ultramatic
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Regarding water in the exhaust, since I've been adjusting valves and using the stethoscope, I'd say the engine has idled for 30+ minutes, maybe more. I cranked it yesterday and it blew out a small amount. Maybe the previous days had blown out most of the idling water.
I will say that the engine has never run better for me. The analog meter at curb idle swings +/- maybe 1 or 2 RPM at about 340. At that speed the vacuum is 16 +/- maybe .5. Under the above conditions, every 5 - 10 seconds there is a bubble or two at the radiator fill. I was expecting a lot more. The compression is mostly about 120 but goes from 115 to 125.
Posted on: 12/27 9:53
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Re: Troubleshoot Loud Ticking 2498 288 Ultramatic
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There is a new development that I think just started today. There is a significant amount of water coming from the tailpipe. I mopped it up and restarted the engine. It expelled probably a 1/2 cup of water in maybe about a minute and is steaming.
After the engine got hot I re-torqued the head, anywhere from about 1/2 to 3/4 of a turn each. The head gasket is probably blown.
Posted on: 12/23 21:03
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Re: Troubleshoot Loud Ticking 2498 288 Ultramatic
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- When is the noise most apparent? Low or high engine speeds? Heavy load, light load, deceleration?
Response: Most apparent at idle and during heavy acceleration. - What frequency is the noise? Crankshaft speed or camshaft speed? Response: On analog tachometer at about 550 RPM, the audio spectrum peaks are as follows: 1st peak is -30 dB at 112 hz 2nd peak is -29 dB at 1113.7 hz 3rd peak is -31 dB at 5672 hz. Or is it irregular? Response: It is regular. Could simply be an exhaust leak, Response: Frankly I believe there may be an exhaust leak. This was noticeable around the manifolds earlier in this process by using Seafoam and revving the engine. Subsequently, I torqued the manifolds to 30. If there are some more suitable tools I'd be happy to have them pointed out. I used a straight socket/extension on 1/8 and 3/6 nuts. I used a socket, universal joint and extension on 2/7. I used an offset open-ended crowfoot and extension on 4/5. the manifolds are known to warp and often need refaced.. Response: The intake/exhaust manifolds were resurfaced as an assembly and installed and torqued IAW the "1951-1954 Service Manual" Engine_IX.pdf.. I did inadvertently run the engine pretty hot the first time I adjusted the valves. This was when the automatic choke wasn't operating freely. And yes, share the video. Your accurate description of the problem is only as good as your own troubleshooting skills. In other words, if you think it's a valve noise, who are we to disagree except to hear it ourselves? But maybe someone will have a better guess. Response: I can upload zip files to the forum. There is an Adobe web page that I hope I can use to zip the mp4.
Posted on: 12/23 19:27
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Re: Troubleshoot Loud Ticking 2498 288 Ultramatic
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Are your valve guides new?
Response: No. Isn't a valve that bounces more an indication that the valve and seat are mating well? Shouldn't guides be reamed to spec? Maybe you have a tight guide that is causing a valve to stick? Response: Guides were reamed to spec. Pistons were not removed, correct? Response: Pistons were not removed. If the ticking sound is present at an idle, you could try removing plug wires one at a time to see if the sound goes away on a certain cylinder. If a valve is sticking open and being closed by the combustion cycle the sound should go away, or be less noticable when the plug wire is pulled. Response: Just tried removing plug wires one at a time with slight decrease in speed but no noticeable change in clicking. Is the sound present both when the engine is cold and when it is at operating temp? Response: Starts clicking within 20-30 seconds when started cold. Or at least becomes very noticeable after 20-30 seconds.
Posted on: 12/23 18:36
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Troubleshoot Loud Ticking 2498 288 Ultramatic
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I can't figure out loud ticking.
2498 288 Ultramatic. I finished the following on the engine: valve seats ground valves ground valve guides reamed to where every valve would bounce when dropped head sandblasted and surface measured within spec head sandblasted, primed and top coat replaced cracked intake manifold intake and exhaust manifolds sandblasted, primed and painted intake/exhaust manifold assembly resurfaced New head and manifold gaskets New grade 5 or 8 washers and nuts for head and manifolds. Cranked engine. Engine had some valve noise but not excessive. Drove car several times. Stalled on two occasions and hard to start. Realized there was no accelerator stream. Rebuilt carburetor. Used the old automatic choke gasket until I realized it was interfering with choke coil. Then replaced gasket with new. New ignition coil. New points. Reset dwell. Sandblasted plugs. Between first time I ran it and now it has developed a loud tick. Set valve clearances while warm and running. Vacuum slightly over 16 psi with maybe .5 swing. Measured at about 340 RPM curb idle with about 10 RPM swing. RPM very stable. Used stethoscope and loudest point seems to be on exhaust manifold between 1 and 2/3. Vacuum and idle seem too stable for sticky valve but may be. About half of lifters rotate. Could this be a lifter? The cam? I have video/audio of vacuum, RPM and ticking if anyone could watch/listen.
Posted on: 12/23 17:12
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2498 288 WGD Choke Warm Position
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Should the choke be wide open when warm?
Posted on: 2024/11/27 17:28
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Where to measure manifold vacuum?
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At the vacuum advance port or the vacuum pump port? 2498 288 How many turns out to start?
Posted on: 2024/11/13 19:25
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Re: Smoke Generator Recommendations
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I checked the clearances twice. I had an average of about 125 before I started except for one that would intermittently read 60.
Posted on: 2024/9/23 14:57
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