which socket main bearing cap

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Emeraude
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* REQUIRED* Type and Year of Model Ts owned: 1921 touring
Location: Grafton ND

which socket main bearing cap

Post by Emeraude » Wed Jun 30, 2021 11:52 am

I am in the process of checking for a knock in my 21 touringI checking both the rods and main I see that the main crank bolts are a square bolt. My question is what is the safest socket to use so as not to strip the head of the bolt> All I have now is a 12 point.
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speedytinc
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* REQUIRED* Type and Year of Model Ts owned: 14/15 wide track roadster. 23 touring, 27 roadster pickup, 20ish rajo touring
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Re: which socket main bearing cap

Post by speedytinc » Wed Jun 30, 2021 11:59 am

12 points are no good.
8 points are available(ebay) Square would be best. Original old service tools for this were square. Have not seen modern sockets in square.
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Topic author
Emeraude
Posts: 87
Joined: Tue Jan 08, 2019 10:00 am
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Re: which socket main bearing cap

Post by Emeraude » Wed Jun 30, 2021 12:20 pm

How about a 6 point impact socket?
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speedytinc
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Re: which socket main bearing cap

Post by speedytinc » Wed Jun 30, 2021 12:34 pm

Hell no. 6 point on a square bolt? No. Get an 8 point. (Double square)
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Mark Gregush
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Re: which socket main bearing cap

Post by Mark Gregush » Wed Jun 30, 2021 12:35 pm

Emeraude wrote: ↑
Wed Jun 30, 2021 12:20 pm
 How about a 6 point impact socket?
its square, 6 point would not work. Needs to be original square or 9/16 8 point.
I know the voices aren't real but damn they have some good ideas! :shock:

1925 Cut down pickup
1948 Ford F2 pickup
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BobShirleyAtlantaTx
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Re: which socket main bearing cap

Post by BobShirleyAtlantaTx » Wed Jun 30, 2021 1:08 pm

image.jpg
image.jpg
image.jpg
. This is a Snap-on, probably easy to find on line or in your area.
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TFan
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Re: which socket main bearing cap

Post by TFan » Wed Jun 30, 2021 3:38 pm

Here you go, the socket is a Wright 4fs18 and the wrench is a Mossberg 622 more than likely a copy of a Ford tool. Jim
PICT0030.JPG
PICT0025.JPG
Attachments
PICT0029.JPG
Back road kinda guy stuck on the freeway of life.
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Hudson29
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Re: which socket main bearing cap

Post by Hudson29 » Wed Jun 30, 2021 7:09 pm

Would a regular open end wrench do the job?

paul
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Dan McEachern
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Re: which socket main bearing cap

Post by Dan McEachern » Wed Jun 30, 2021 7:50 pm

https://www.amazon.com/s?k=9%2F16+8+poi ... _sb_noss_2
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Scott_Conger
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Re: which socket main bearing cap

Post by Scott_Conger » Wed Jun 30, 2021 8:54 pm

Do not be fooled into believing the way to release the center main is via the bolt heads. If you look carefully at them, that isn't a drip of oil hanging from a corner, but a "bump" indicating the direction of the cotter pin hole between the cylinders...the bump goes inward or outward...so that you have straight-on access to install cotterpins on the nuts.

the tightening is done on the nuts...you have but to hold the bolt steady with a wrench...not torque or untorque it.

All that said, let's hope you don't have a worn center main...if you do and are tempted to tighten it, you will elevate the risk of breaking the crank shaft in the future. They are notorious for wearing out as the 4th main wears out and allows the transmission to sag...this bows the crank up in the middle.

A center main knock can be all but eliminated by reving the engine sufficiently to stay running while you short out #2 and 3 cylinders...the knock will either disappear or be dramatically reduced. If this is the case, then it is indeed worn and you have some work ahead of you and it is not to just remove a few shims.
Scott Conger

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