[AT] Slight Oil Leak

[charlie hill]

All of the oil that is in the heads of an Allis B engine are pumped up there 
externally and into a port on the distributor side of the engine.  From 
there the oil flows though a channel in the head casting and up through one 
of the rocker arm studs that is hollow.  It then runs down the inside of the 
rocker arm tube, over the valve train and then it drains back through holes 
in the head back to the inside of the block.  There are no oil passages in 
the head on the manifold side.

You need to pull the valve cover, check for leaks on the valve cover gasket, 
check to see that the oil is flowing back through the head into the block 
without ponding up in the top of the head and re-torque the head.  If you 
don't find the problem in one of those places then you have a head gasket 
problem, a warped head or some problem with the top of the block.  There is 
no way that I can think of for oil to come out through the manifold stud 
holes.  If enough oil is getting by the oil rings to get into the manifold 
and flow out around the manifold gasket then you should be getting oil 
blowing out of the exhaust pipe.

Charlie
----- Original Message ----- 
From: "LeRoy Price III" <leroy_price3 at hotmail.com>
To: <at at lists.antique-tractor.com>
Sent: Wednesday, August 29, 2007 3:14 PM
Subject: Re: [AT] Slight Oil Leak


>
> Its an Allis B.  Its leaking on the bottom edge of the manifold.  I pulled
> the oil sick and didn't see anything unusual there.  Could to much oil do
> this?
>
>
>>From: "charlie hill" <chill8 at suddenlink.net>
>>Reply-To: Antique tractor email discussion group
>><at at lists.antique-tractor.com>
>>To: "Antique tractor email discussion group" 
>><at at lists.antique-tractor.com>
>>Subject: Re: [AT] Slight Oil Leak
>>Date: Wed, 29 Aug 2007 14:42:26 -0400
>>
>>You might need to re-check the torque on your  head bolts.  Is there any
>>sign of oil in the water or water in the oil?
>>
>>What brand of tractor/engine are we talking about?  It would make more
>>sense
>>if you told us you were seeing water.  I can't figure out how oil would
>>leak
>>out around the manifold bolts.  Those holes are usually blind taped into
>>the
>>block or drilled through into a water jacket.  There may be some engines
>>where they are drilled through into an oil passage.
>>
>>Charlie
>>----- Original Message -----
>>From: "LeRoy Price III" <leroy_price3 at hotmail.com>
>>To: <at at lists.antique-tractor.com>
>>Sent: Wednesday, August 29, 2007 1:16 PM
>>Subject: [AT] Slight Oil Leak
>>
>>
>> >
>> > I have a tractor that was restored and was fine last year.  However,
>>when
>> > starting it this year I noticed that oil started to leak slightly after
>> > running 10 minutes or so from the bottom of the manifold.  I tighten
>>them
>> > a
>> > bit and it got a little better but now its also leaking along the head
>> > where
>> > it meets the block.  There may be 15 hours or so on the rebuild.  Whats
>> > going on?
>> >
>> > LeRoy
>> >
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