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03-22-2019, 07:45 AM | #21 |
BANNED
Join Date: Apr 2017
Location: Sacramento
Posts: 1,262
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Re: Rear Main Bearing Oil Behavior
The original poster cited oil at thousands of psi due to 'squeeze'. I used the graphic to point out that no pressure is created when gravity lubricating the main bearing.I appreciate the fact that all anyone wants is to limit oil leaks but bear in mind,ford used seepage from the rear main and shift detent rods to lubricate the front radius rod ball assembly.
This is a 1931 Ford showroom..look carefully under the front of the cars they have drip pans.. Limiting the flow to the rear main journal by restricting the annular tube feeding the bearing is some dangerous shirt tail engineering.. |
03-22-2019, 08:21 AM | #22 |
Member
Join Date: May 2010
Location: Rutland, MA
Posts: 81
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Re: Rear Main Bearing Oil Behavior
Brent,
We saw a instant where the welch plug was removed from the rear main cap and not put back in during the reassembly. The rear main leaked profusely and took awhile to figure out what was happening. Replacing the missing welch plug solved the leak. Keith
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Keith |
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03-22-2019, 03:39 PM | #23 |
Junior Member
Join Date: Nov 2010
Location: Lexington, S.C.
Posts: 5
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Re: Rear Main Bearing Oil Behavior
Do what ever you want it"s your car. Mine don"t leak!
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03-23-2019, 07:11 AM | #24 |
Junior Member
Join Date: Nov 2010
Location: Lexington, S.C.
Posts: 5
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Re: Rear Main Bearing Oil Behavior
Brent and I are on the same page. As I stated numerous times , the first order of business is to return the clearances to the .0015" specification. This in it's self is enough to keep the oil where it belongs. As soon as the engine is started up the wear begins again. The small tube I mentioned is only intended to prevent the flow of oil, when the clearances begin to get out of tolerance again, from overwhelming the ability of the groove and tube in the rear main to evacuate it back to the oilpan. By inserting the tube and preventing the oil from being slung into the bell housing you can save a clutch and any other parts from being contaminated by the oil.
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03-23-2019, 07:39 AM | #25 | |
Senior Member
Join Date: Aug 2018
Posts: 2,332
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Re: Rear Main Bearing Oil Behavior
Quote:
Arm Chair Mechanic here. I thought the Crankcases Oil Breather Tube prevented crankcase pressure caused by blowby? That is why you get fumes/oil on the motor on the drivers side, pushing fumes/oil out the breather tube on motors with blowby. If I am wrong, would appreciate learning why. |
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