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Joined: Jan 2002
Posts: 89
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jan 2002
Posts: 89 |
When I bought my 1947 sedan the 216 engine had been replaced with a 235 from a 1953 car. The engine is now rebuilt and runs good. The rear seal was replaced with a rope seal and will leak alittle when I run around town.But if I go on the freeway and run 55 to 60 mph for awhile when I get home the Trans is covered in oil. I was thinking maybe there is too much pressure in the crank case. I am using the vent tub off of the 216.The motor has 40 psi at that speed. Any ideas? Thanks mark47
mark47
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Joined: Dec 2001
Posts: 10,379 Likes: 1
Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
Posts: 10,379 Likes: 1 |
Clean off the rear of the engine and drive it again. Check to see if the oil is coming from the rear of the valve cover and running down the back. 
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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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 |
The 235 and 216 vents are the same.The most inmportant thing is for the vent to be clean.The interior baffles can plug up with sludge.If you can see fumes coming from the vent at idle you know its working some what.
Gene Schneider
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Joined: Jan 2002
Posts: 89
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jan 2002
Posts: 89 |
Thanks guys .I checked the back of the value cover and it was clean. After a run there will be a drip of oil on the floor from the vent and oil all over the inside of the vent.That made me think that mybe too much pressure in the crack case.
mark47
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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 |
There is a baffle inside the block to deflect oil from entering the tube....if thats missing it can throw oil from the vent.To ckeck, remove the vent.The hole should be blocked by the baffle about an inch down.While the vent is off clean it out.Soak it in mineral sprits and flush out with pressure from a garden hose.You may be surprised as to what is hiding in there.
If the car is a stick block the hole on the flywheel cover and take a little ride.When you get home open the hole and see if oil drips out.If it does you will know its probably the rear main.
Gene Schneider
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