01-25-2018, 02:25 PM | #21 |
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Re: oil pressure
I have seen where the tube leading from the valve chamber to the rear main was bent in an attempt to slow rear main bearing leaks . This practice slows oil flow to the rear main bearing and lengthen the time that it takes for the rear main to get proper lubrication .
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01-25-2018, 02:49 PM | #22 |
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Re: oil pressure
I don't see any photo in post #6
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01-25-2018, 03:02 PM | #23 |
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Re: oil pressure
Two pictures show up on post number 6 here .
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01-25-2018, 08:24 PM | #24 |
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Re: oil pressure
A jagged, rounded front hole, right behind the cam gear, is normal, and how Ford built it.
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01-25-2018, 09:47 PM | #25 | |
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Re: oil pressure
Quote:
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01-26-2018, 10:18 AM | #26 |
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Re: oil pressure
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01-27-2018, 05:00 PM | #27 |
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Re: oil pressure
I guess the purpose of this construction must be to lead the oil towards the timing gear insted of the rear of the oil galery?
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01-27-2018, 08:11 PM | #28 |
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Re: oil pressure
I cleaned the sludge from the valve chamber. It was not real bad, but definitely was needing cleaned. I had cleaned the pan previously and drove it around some, maybe 30 miles in sort trips, and then read here about cleaning the valve chamber. This of course is a new to me car. I am an old pro auto mechanic, but other than growing up learning to drive with dads 28AR, I never worked on them before. So now have got a 29 Tudor, am learning a lot, but still confused about a lot. I know if I need major workalike removing engine/trans/diff, I will need to take it to an expert, as I don't have the space or equipment anymore. But my question is, now that I have cleaned the valve chamber, could someone show me a picture of where the drain/feed holes to the mains are. I wiped the area out and blew it with high pressure air (made a mess) but not positive I cleared the holes. I did find a couple holes, and run a wire in them, but only seemed top go in an inch or so. Maybe the hole takes a turn?
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01-27-2018, 10:13 PM | #29 | |
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Re: oil pressure
Quote:
Poke around the rear inside corners to find the holes that oil the mains. Stick pipe cleaners down each one until the wire touches the crank, then pull them out and see if they picked up any sludge. I or someone else has posted pictures of the holes a few years ago. If you found one in the rear and it only goes an inch or two, that is the one that feeds oil to the rear cam bearing. |
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01-28-2018, 11:38 AM | #30 |
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Re: oil pressure
Thanks. So what would be the approximate diameter of the holes I am looking for? 1/8 inch, 1/4 inch? and there should be 3 , right? How many for the cam bearings?
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01-28-2018, 01:47 PM | #31 |
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Re: oil pressure
There are three dams in the lifter chamber I don't believe oil should ever flow over any of them. They are used to keep oil in the area's of the main bearing tubes when going up or down long steep hills. The oil flow in the chamber is governed by the lifter cover. Look inside the cover and you will see two small raised bosses that line up with the dams but are much shorter. Oil flows over these bosses and around the dam's the Essex runs down the drain back tube to fill the dipper tray and lube the rods. Oil flow to the mains and cam bearings happens rather quickly after startup oil to the dipped tray takes a little longer.
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01-28-2018, 02:27 PM | #32 |
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Re: oil pressure
thanks, I will have to look to see if all the holes to the main and cams are open, and didn't get plugged when I wiped the sludge out. Sure would like to see a picture though so I know what I am looking for.
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01-28-2018, 05:50 PM | #33 | |
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Re: oil pressure
Quote:
Now, to answer an intelligent question: Motor oils of old had a very high sulfur content. So did the gasoline. Add a little moisture and combustion byproducts to it and you had a very corrosive mix. Add to that the the effects of untold thousands of gallons of oil filled with grit and worn off metal rushing over it and you can better understand what happens over 80 years or so. That is one of the reasons manufacturers (i.e. Ford) called for 500 mile oil changes. Acidic oil was responsible for all kinds of problems back when. Pitted and eroded engine bearings being the worst. The oil dam in the valve chamber was a very thin casting toward the top. Easily damaged over time. 'nuff said.... |
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01-29-2018, 02:14 AM | #34 |
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Re: oil pressure
So, the oil flows over the front hole and wears it to a jagged edge, then the same oil goes into the dipper tray where oil scoops hit it at great speed and sling it against the cam and cylinder walls, yet none of those three items get any damage. I'm new at this and just learning.
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01-29-2018, 03:28 AM | #35 |
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Re: oil pressure
Are you able to post the portion of the drawing that calls for it to be machined straight across?
I have never seen a block with a straight dam nor have I ever read about it being so. I would like to see the drawing to educate us all. While this engine has pressure lines you can clearly see the jagged edge. Still another one, Can you show us a photo of a block with a nice straight line in the valve galley?
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01-29-2018, 03:39 AM | #36 | |
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Re: oil pressure
Quote:
Try a Google search for "main bearing oil holes in valve chamber" and see if that works. https://www.vintagefordforum.net/for...-engine-topics Here's another link that should get you to my pictures: http://www.ahooga.com/wwwboard/messages/282982.shtml Last edited by Tom Wesenberg; 01-29-2018 at 05:32 AM. |
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01-29-2018, 11:47 AM | #37 |
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Re: oil pressure
I am sure I don't know what I am doing, but I can't get to any pictures on any of these links. I got to where you had pic on the vintage ford site, and tried to register to see pix, but not having a lot of luck.
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01-29-2018, 11:54 AM | #38 |
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Re: oil pressure
oldforder, I got the ahooga link to work. Once you get there you need to click "main bearing feed holes" That will take you to a thread where you need to go to one of the last posts to see Tom's excellent photos.
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01-29-2018, 12:01 PM | #39 |
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Re: oil pressure
I got that far, but it says I have to register. I did that and have received verification from them that I am registered, and still no pix from Toms post. I am very NOT computer literate. Also I am using a Mac, but I wouldn't think that should matter.
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01-29-2018, 12:41 PM | #40 |
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Re: oil pressure
I don't remember joining that group, but maybe I did. When I hit the link, I don't have a place to register. If you have been accepted, when you get to that page, it should be titles "main bearing hole locations". Then there will be two red lines. Below them it should say "posted by Tom Wesenburg" Near the left margin of that section you should see "Main Bearing Feed Holes" in blue. Clicking on that should take to the thread with Tom's photos.
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