Re: Another early Hemi question
[Re: B1arno]
#1369445
01/17/13 12:45 AM
01/17/13 12:45 AM
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Joined: Jan 2003
Posts: 10,563 Freeport IL USA
poorboy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,563
Freeport IL USA
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I've not had an old Hemi torn down, but all the other Mopar motors that oil the rocker shafts through the cam bearing only send oil up through the port once every revolution, when the cam port lines up with the oil port in the bearing. If the cam bearing was incorrectly installed, the oil hole may be only partially open, which would restrict the amount of oil getting up to the rocker shafts.
What concerns me is that the design of the oil ports in the rocker shaft should oil the upper rocker first, but is not. I bought a new Chrysler 360 block once that only had the oil passage through the block drilled part way. The way I discovered that was on a long trip with the fresh motor, I bent the push rod on either #1 or #8 cylinder (can't remember which). What I thought was oil flow turned out to be oil splash from the cam/ lifter area. Motor had very high idle oil pressure. No oil was coming through the rocker shaft. There was enough splash to lube the rockers around town, but the long highway trip prevented the mostly splash protected rocker on that one cylinder from getting enough lube and tightened up enough to bend the push rod. I had to pull down the motor and finish drilling the oil passage through the block and replace the rocker shaft and the rockers and push rods on that one cylinder.
The reason I wrote all of this is because I want to know if the oil you see on the lower rocker shafts is from the oiling system or oil splash from the cam & lifter area? Pull the rocker shaft, pull the dist, turn the oil pump with a drill and a pre-lube tool, and rotate the motor at least 2 full revolutions. If the oil passages are open, there will be no doubt, oil will shoot out of the passage at oil pressure force. Once fixed, the oil shot out of the oil passage on each side past the front tire on my 35 sedan. I'm betting the oil hole in the cam bearing is not lined up with the oil hole in the block and the oil you are seeing on your lower rocker shaft is from splash. Sorry Gene
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Re: Another early Hemi question
[Re: Robbins]
#1369452
01/19/13 09:42 PM
01/19/13 09:42 PM
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Joined: Apr 2005
Posts: 1,528 Southeast PA
5wndwcpe
pro stock
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pro stock
Joined: Apr 2005
Posts: 1,528
Southeast PA
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And some day you'll find an oily booger on the other side of the garage wondering where it came from.
1968 GTX hardtop 1968 Sport Satellite Convertible 383/4spd 1933 Plymouth coupe 2002 Ram 2500 oil burner 4x4 2015 Grand Cherokee 2013 Challenger 1957 Chrysler Saratoga
Man...I need a bigger freakin' garage.
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Re: Another early Hemi question
[Re: moparx]
#1369454
01/20/13 03:13 PM
01/20/13 03:13 PM
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Joined: Jan 2007
Posts: 1,039 Redwood City Ca.
B1arno
OP
super stock
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OP
super stock
Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
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Quote:
glad you found it arno ! but i would wonder just how many other sillycone boogers are floating around in there and just where did it originate from ? that would bug me a bunch !
Exactly! That will bother me but short of tearing the whole thing down I think that this is the best I can do. As for where it came from, my guess is the oil filter adapter. When I took it off it looked as though they used a bit to much silicone on the gasket. The two oil passages had some silicone squeeze out into them when it was tightened down. I'm thinking some broke off when pressure was sent through the filter. I've cleaned that all up now. Thanks all for your help. I will let you know what happens when I get it running again. Arno
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Re: Another early Hemi question
[Re: B1arno]
#1369455
01/20/13 03:26 PM
01/20/13 03:26 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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I almost never use RTV wen I build an engine, you have experience why now. I'll run a file across mating surfaces if need be and spray my gaskets with copper spray if need be. The only places I'll put a tiny bit of RTV is the corners of a multipiece gasket (intake and oil pan).
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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