I just added 3 pictures to the engine technical section to show the location of the oil feed holes to the main bearings. The location of the holes seems to come up quite often, and when some sludge is in the valve chamber, they can be hard to find. I also added a picture of the front hole where oil overflows onto the cam gear. Does anyone have a blueprint showing exactly how this opening was formed? It appears that a thin cast wall was left during the casting of the block, then the casting was punched out during the cleaning and machining process. Anyone know for sure what the process was to create the jagged opening?
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That area was the seat of a core print. The actual print, or core support was circular and somewhat smaller than the rectangular area seen as the opening. A slight gap was purposely left surrounding that core support. That permitted some angular movement while setting the core without contact of friable edges which would drop loose sand (inclusions) into the mold and casting. As you have stated, the resultant thin fin was manually knocked out (sometimes poorly!) during shakeout and rough cleaning.Originally posted by Tom Wesenberg View PostMechanical engineering 101: If you put an adjustment knob, screw, bolt, or tolerance specs on something, some people will immediately fiddle with it. If you mark it DO NOT TOUCH everyone will mess with it.
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I have been seeing folk getting all over MMO and questioning the reason for using it. Well, I think it is time to clear a bit of air within these airheads and explain why MMO or Seafoam, or these top end lubricants are almost a must.
If you will take a look at this picture of the valve chamber, you will see to the right a copper tube protruding from the bottom of the valve valley. Well,...09-05-2017, 10:30 PM -
Readjusting valves on newly built engine. Noticed when I pulled valve cover off, oil went everywhere. The center valley was full, but not the ends. When I put oil down the end main feeders it drains, but the center main does not. I know the feeders were flushed. Which is normal? about a half hr run time over several starts in a stand. I thought I had a tappit noise, but now thinking it’s the center...02-08-2018, 03:51 PM -
Al, we really need a fresh thread to get this going, so here it is. I am very interested in the way you did that, and it looks so simple.01-26-2018, 09:42 PM
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Okay, I know," if it's not leaking its out of oil." BUT, after driving I get a medium sized puddle of oil out the flywheel cover (cotter pin).
I have removed the cover and run it, looked at the rear main (dry), checked the pan bolts, and verified the oil return line on the block side is not leaking.
I am thinking the cam gasket, but wanted to see if anyone had other ideas before...10-04-2019, 11:15 AM -
So I've been driving this car a week or two now, parked in garage it leaks no oil, go for a drive and come back and park it on driveway and it drips oil from the weep hole in the bell housing for 5 or 10 minutes after I return. Clearly leaking while running. Read some about clogged oil return line from the rear main bearing, and other issues regarding leak at bearing and/or seal. Have read other sources...11-13-2019, 09:34 AM -
I am in the process of cleaning any sludge and old oil from my A’s little motor. Dropped the oil pan and I guess I am missing the rear main cap drain tube. Yikes...02-07-2019, 10:23 AM -
I keep finding new things even after all these years. I have had trouble getting the 29 tudor to run because of the goo in the fuel system from 1970s tank sealer. Anyway, I had things apart today checking the valves and noticed that there were two drain holes in the rear, I am pretty sure that my other engines have just one. I saw where the service bulletins told how to drill the hole on older engines,...You do not have permission to view this gallery.
This gallery has 1 photos.03-04-2020, 05:06 PM -
I have a 1931 Model A with an original engine, never out of the frame or rebuilt. What type and weight oil would be the best for this Car ?11-28-2018, 10:30 AM -
Am I correct in think that pouring oil down the distributor shaft hole will fill the dipper tray?06-04-2019, 08:54 PM -
What oil do you use for a hand held oil can to lube the various parts on the model A? Also do you use an antique oiler or a new one? The ladder is more curiosity than anything....10-08-2019, 07:29 PM
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