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which socket main bearing cap
Posted: Wed Jun 30, 2021 11:52 am
by Emeraude
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.
Re: which socket main bearing cap
Posted: Wed Jun 30, 2021 11:59 am
by speedytinc
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.
Re: which socket main bearing cap
Posted: Wed Jun 30, 2021 12:20 pm
by Emeraude
How about a 6 point impact socket?
Re: which socket main bearing cap
Posted: Wed Jun 30, 2021 12:34 pm
by speedytinc
Hell no. 6 point on a square bolt? No. Get an 8 point. (Double square)
Re: which socket main bearing cap
Posted: Wed Jun 30, 2021 12:35 pm
by Mark Gregush
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.
Re: which socket main bearing cap
Posted: Wed Jun 30, 2021 1:08 pm
by BobShirleyAtlantaTx
. This is a Snap-on, probably easy to find on line or in your area.
Re: which socket main bearing cap
Posted: Wed Jun 30, 2021 3:38 pm
by TFan
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
Re: which socket main bearing cap
Posted: Wed Jun 30, 2021 7:09 pm
by Hudson29
Would a regular open end wrench do the job?
paul
Re: which socket main bearing cap
Posted: Wed Jun 30, 2021 7:50 pm
by Dan McEachern
Re: which socket main bearing cap
Posted: Wed Jun 30, 2021 8:54 pm
by Scott_Conger
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.