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Joined: Feb 2009
Posts: 51
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Feb 2009
Posts: 51 |
Hi this is grease monkey 123
My question is this. I know there is a oil o ring at the top of the valves just under the keys.but do they also have oil seals at the bottem of the stem and head.
I know on ford 6 cyl they have rubber seals that slip over the stem and goes over the valve guide to prevent oil from going down the guide and causing the engin to smoke.Thanks for any info
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
For a 216-235 engine, 1948 and up the O ring seal was used on the valve stem inside of the valve spring retiner. If this O ring is installed properly no other seals, etc. are necessary.
When insalling the O ring the spring retainer must be compressed, the O ring installed and then the the pressure released. If not done in that order the O ring willl be knocked out of the grove.
I use the Ford seal on pre 1948 engines as they have no provision for the O ring seal and have had good luck with them.
Gene Schneider
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Joined: Feb 2009
Posts: 51
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Feb 2009
Posts: 51 |
Hi Chevgene.
Thanks for the info. I don't know if this is true but a old timer told me that between 1950 and 52 they did use a seal like the fords on assembly..
What is confusing me is the car does not smoke but under the valve springs there are valve seals like the ones used on fords 6 cyl. I had found pieces that have broken apart and was on the head. Either they were put in at the factory for some reason or someone did it after. In all my books there is no mention of the ford type seals being used only the o rings.Because they are beaking up I guess I will have to replace them with the ford type.If that stuff the broken rubber or cork isn't removed it could clog something (LIFTER) or bend a push rod
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
Believe me, I am an old timer also. Was employed at a
Chevrolet dealer (parts dept) from 1950-1977.......those seals were installed at a valve grind some where in the last 60 years. Was not unusual to grind valves on those engines every 35,000 miles or so.
Gene Schneider
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Joined: Dec 2001
Posts: 865
ChatMaster - 750
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ChatMaster - 750
Joined: Dec 2001
Posts: 865 |
From another Old Timer, I worked as a mechanic in the fifty's and it wasn't unusual for the Ford seals (we called them bonnets)to be used on Chevy valve jobs if the guides were worn.
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