Source of knock found!
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Topic author - Posts: 152
- Joined: Mon Jan 07, 2019 1:58 am
- First Name: John
- Last Name: bevardos
- * REQUIRED* Type and Year of Model Ts owned: Roadster, Coupe, pickup truck, 2-door
- Location: Los Angeles
Source of knock found!
OK Model T brothers and sisters, with a good advice from Hank in Tennessee, I checked the wrist pin bolts for my knock, and they were all tight. I started probing further and I noticed some Babbitt coming off the thrust surfaces of the connecting rods. So it turns out I have 3 connecting rods where, due to improper tinning, all the Babbitt bearings spun inside the connecting rods. I have mic the crank and it checks out at 1.243 to 1.245. Should I get standard connecting rods and take the shims out or should I get .010 over and try and scrape the bearings. As always all advice is welcome. Thank you, John
Who's still makes these gaskets, I might be in the market for a solid copper one myself.
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- Posts: 5339
- Joined: Sun Jan 06, 2019 11:09 am
- First Name: Henry
- Last Name: Lee
- * REQUIRED* Type and Year of Model Ts owned: Many
- Location: South Pittsburg, TN
- MTFCA Number: 479
- MTFCA Life Member: YES
Re: Source of knock found!
Oh Crap John, not good for the home team! Well it could have been worst. glad you found it.
Hank
Hank
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- Posts: 1319
- Joined: Thu Jan 10, 2019 5:47 pm
- First Name: Les
- Last Name: Schubert
- * REQUIRED* Type and Year of Model Ts owned: 27 roadster 13 touring
- Location: Calgary
Re: Source of knock found!
John
Considering the time of year, here is my thoughts
The crank is quite likely out of round.
So remove the crank and get it ground. Probably should be no problem cleaning up at .020 undersize
.020 rods should be easy to get
Considering the time of year, here is my thoughts
The crank is quite likely out of round.
So remove the crank and get it ground. Probably should be no problem cleaning up at .020 undersize
.020 rods should be easy to get
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- Posts: 663
- Joined: Fri Jan 04, 2019 11:15 am
- First Name: Tony
- Last Name: Bowker
- * REQUIRED* Type and Year of Model Ts owned: 1914 touring
- Location: La Mesa, CA
- MTFCA Number: 32
- MTFCA Life Member: YES
- Board Member Since: 2005
Re: Source of knock found!
Our local babbitt company, Antique Engines in Escondido currently recommend against using newly babbitted rods if the crank is out of round by more that half a thou.
Tony Bowker
La Mesa, California
1914 Touring, 1915 Speedster, 1924 Coupe.
La Mesa, California
1914 Touring, 1915 Speedster, 1924 Coupe.
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Topic author - Posts: 152
- Joined: Mon Jan 07, 2019 1:58 am
- First Name: John
- Last Name: bevardos
- * REQUIRED* Type and Year of Model Ts owned: Roadster, Coupe, pickup truck, 2-door
- Location: Los Angeles
Re: Source of knock found!
Forgot to add....looks like a recent rebuild...all looks new inside and has all shims in rods and mains...all was fine until this...
Who's still makes these gaskets, I might be in the market for a solid copper one myself.
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- Posts: 238
- Joined: Sun Jan 06, 2019 12:09 pm
- First Name: Philip
- Last Name: Thompson
- * REQUIRED* Type and Year of Model Ts owned: 1924 touring
- Location: Graham NC
Re: Source of knock found!
I would mic. The crank good and it is round send the rods off with the measurements and get the
Custom poured. Philip
Custom poured. Philip
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- Posts: 1069
- Joined: Sun Jan 06, 2019 12:18 pm
- First Name: John
- Last Name: Warren
- * REQUIRED* Type and Year of Model Ts owned: 14 Roadster, 25 Pickup , 26 Canadian Touring , and a 24-28 TA race car
- Location: Henderson, Nevada
Re: Source of knock found!
I have rounded up cranks using emery cloth, more of an emergency repair or get you by for a while. Another thing to check is barreling of the journals, this is where the crank pins are fatter in the middle. This is caused from twisted rods. Just wondering if the same guy did the main bearings.( not tinning them correctly) As Les said getting it ground is best! I thought about getting one ground and decided bite the bullet an to put a new Scatt crank in. If you decide to pull the crank, It will also give you a chance to make sure the 4th main is done correctly ( check and or straighten the pan ). We all have been there. With all this said, most of the T engines don't run much or hard, so depending on how you intend to use the T, directly dictates how you should repair it. I use my cars a lot and don't want to worry about taking it on a run. Good luck in what ever you decide.
24-28 TA race car, 26 Canadian touring, 25 Roadster pickup, 14 Roadster, and 11AB Maxwell runabout
Keep it simple and keep a good junk pile if you want to invent something
Keep it simple and keep a good junk pile if you want to invent something