RATTLE DRIVING ME CRAZY
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Topic author - Posts: 177
- Joined: Tue Jan 29, 2019 10:21 am
- First Name: John
- Last Name: Dow
- * REQUIRED* Type and Year of Model Ts owned: 1923 Touring
- Location: Leawood, Ks
- MTFCA Number: 32344
- Board Member Since: 2015
RATTLE DRIVING ME CRAZY
I'm ready to scream!! The engine runs like a top except for this rattle that I get while idling or coasting. I have adjusted my rod caps and removed a dozen or so spacers. I used the 1" square news paper technique to get the proper clearance. The rattle continued. I pulled the timing cover and found no excessive cam travel. I did see my Dan McEachern brass timing gear had some extra slop so I replaced it with an oversized aluminum gear which fit much better. At the same time I replaced the generator gear. I still have the rattle. Short of an engine rebuild what am I overlooking?
The thought occurs to me to allow it to "self-trouble shoot" by continuing to drive it until whatever it is ultimately fails.
The thought occurs to me to allow it to "self-trouble shoot" by continuing to drive it until whatever it is ultimately fails.
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- Joined: Fri Jan 04, 2019 9:37 pm
- First Name: Steve
- Last Name: Jelf
- * REQUIRED* Type and Year of Model Ts owned: 1923 touring and a few projects
- Location: Parkerfield, Kansas
- MTFCA Number: 16175
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Re: RATTLE DRIVING ME CRAZY
Are you sure it's inside the engine? A loose crank pulley can rattle.
The inevitable often happens.
1915 Runabout
1923 Touring
1915 Runabout
1923 Touring
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- First Name: Val
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Re: RATTLE DRIVING ME CRAZY
It took me years to locate an annoying rattle. Timer rod. At idle with spark moderately advance no noise. On the road with the spark advanced for normal driving rattle. I would have never found it if I had not removed the timer for cleaning.
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- First Name: Scott
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Re: RATTLE DRIVING ME CRAZY
I would be suspicious of 3 things:
slightly u/s piston to bore fit - who cares?
slightly worn piston pins - who cares?
slightly worn center main - short out #2 & 3 simultaneously and if it goes away...that's it...if it doesn't, put in ear plugs and enjoy the car
slightly u/s piston to bore fit - who cares?
slightly worn piston pins - who cares?
slightly worn center main - short out #2 & 3 simultaneously and if it goes away...that's it...if it doesn't, put in ear plugs and enjoy the car
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
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- First Name: Norman
- Last Name: Kling
- Location: Alpine California
Re: RATTLE DRIVING ME CRAZY
Before you tighten the rods, try having someone crank the engine slowly as you observe from underneath with the inspection plate off. If the rods move front to back to front as the engine turns over, you likely have a bent rod. This will cause the piston to be slightly cocked and the wrist pin will not be perfectly parallel with the crankshaft. So when the rod is moving upward, the pin will move in one direction, and when the rod is moving downward, it will move in the other direction. This will not be noticeable on a recently poured bearing, but as the engine wears, the thrust surface will wear until you get this knock. This problem will not cause your engine any problems until it gets so worn that the end of the wrist pin starts to score the cylinder. It is just annoying . If you decide to straighten the rods you will need to pull the head and pull the pistons out. If you do so, you should also replace the rings while it is apart.
Norm
Norm
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Topic author - Posts: 177
- Joined: Tue Jan 29, 2019 10:21 am
- First Name: John
- Last Name: Dow
- * REQUIRED* Type and Year of Model Ts owned: 1923 Touring
- Location: Leawood, Ks
- MTFCA Number: 32344
- Board Member Since: 2015
Re: RATTLE DRIVING ME CRAZY
Scott, Thank you so much for your help. Using your suggestion it appears to be the center main. Actually when I short out either 2 or 3 the noise quits. So what does one do with a noisy center main bearing?
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- Posts: 6420
- Joined: Sun Jan 06, 2019 11:18 am
- First Name: Scott
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Re: RATTLE DRIVING ME CRAZY
John
I am emailing you.
I am emailing you.
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
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Re: RATTLE DRIVING ME CRAZY
"Rattle driving me crazy "...
My old man always said, "that's not a drive, it's a short putt" !!
My old man always said, "that's not a drive, it's a short putt" !!
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- First Name: Martynn
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Re: RATTLE DRIVING ME CRAZY
Or, you could just throw up your hands ans confess it is a Model T after all, not a bloody Packard and all Model T's seem to rattle some, or squeak or make any one of a dozen noises I can think of...sometimes you've just got to let Lizzy be Lizzy (although I do routinely go around an tighten every nut and bolt on her just to make sure it isn't something important).
Fun never quits!