Posted By |
Discussion Topic:
21 bolt head real oil seal
-- page:
1
2
|
|
TomO |
05-07-2015 @ 4:29 PM
|
|
|
Senior
Posts: 7258
Joined: Oct 2009
|
Your engine does not need the ZDDP in the oil. There was very little zinc and phosphorus in the oil until the late 50's when manufacturers were having camshaft were problems that were eventually fixed by changing the metallurgy in the can shafts.
Tom
|
rdofloor |
05-07-2015 @ 9:32 AM
|
|
|
Member
Posts: 42
Joined: Mar 2014
|
my main cap looks like the one in the picture so I do not need the pot metal seal , Rex Gardner from olk. said there was some early one made that way, also little dearbourn sent me a different tube and it has a check valve in it as the one I hade did not. Rex said that sh*ll Rotella dosnot have zink in it any more according to his camshaft supplier. enclosed is a picture
|
rdofloor |
05-07-2015 @ 9:18 AM
|
|
|
Member
Posts: 42
Joined: Mar 2014
|
david j my cap looks like the picture, I may have found the problem my return pipe was straight and no check ball. the pipe that was sent to me from little dearbourn is on the main cap and has a check ball. also I talked to Rex Gartner from ok. and he told me that sh*ll does not have zink in there oil, he got this from his cam shaft supplier.
|
David J |
05-05-2015 @ 6:20 PM
|
|
|
New Member
Posts: 136
Joined: Jan 2014
|
another pic
|
David J |
05-05-2015 @ 6:19 PM
|
|
|
New Member
Posts: 136
Joined: Jan 2014
|
Back to basics here , Can you post pics of this stuff ? That would eliminate much of the confusion . Does your rear main cap look like the pics here ? It should be the same basic configuration . This setup does not have a 'seal" . The double flange on the crank is for this type seal [ labyrinth ] . Also 1.5 thou is pretty darn tight if accurate .
This message was edited by David J on 5-5-15 @ 6:22 PM
|
rdofloor |
05-05-2015 @ 5:24 PM
|
|
|
Member
Posts: 42
Joined: Mar 2014
|
I think i found the problem who ever put this eng together never put the pot metal lower seal in. when i tried to install the lower seal i would not go into the grove. i think that some one exchanged teh bearing cap for another. also my crank has two slinger one it. i am trying to fing a different rear bearing cap. Roger
|
rdofloor |
05-05-2015 @ 5:17 PM
|
|
|
Member
Posts: 42
Joined: Mar 2014
|
i am running sh*ll rotella 15-40 for oil as it has teh zink the is needed.
|
rdofloor |
05-05-2015 @ 5:15 PM
|
|
|
Member
Posts: 42
Joined: Mar 2014
|
i have 1.5 thousands measured with plastigage. i think i might have found the trouble, who ever put this eng together never put the pot metal seal in the bottom. but when i went to put one in it would not fit. i think some one inter change the main bearing cap with a different one. i am in the process of trying to find a different bearing cap. Roger
|
David J |
05-05-2015 @ 10:08 AM
|
|
|
New Member
Posts: 136
Joined: Jan 2014
|
Capacity is 5 quarts of oil . What weight oil are you running ? The pipe should only be turned in about 5 turns or so . If it is scr*w*d in too far it WILL cause a leak . Look closely at the rear cap and pipe and you will see why . What does 1-5 clearance mean ? How did you measure this ? The clearance on the rear half of the rear main [ behind the groove ] is real important with a labyrinth seal . Your oil pressure is not the culprit .
|
rdofloor |
05-04-2015 @ 1:37 PM
|
|
|
Member
Posts: 42
Joined: Mar 2014
|
I have 1-5 thousands in the rear main
|