OK recently posted about the rear seal I'm about to replace due to an oil leak. I've noticed a mechanism that seem to be causing the oil leak.
seem the rear seal doesn't directly leak when the engine is running or if it is its very little. I noticed after changing the engine diapers that they stay clean until i turn the engine off, then, after a few seconds, I get a small trickle of oil out of the seal. Friday the engine was topped up with oil after a day of fishing with many starts and stops I returned to the dock a qt. low. engine diaper was soaked. So today I inspected the engine and a friend who knows a ton about 360's listened to my symptoms and asked how the PCV valve looked. I pulled it and noticed that it was not connected in the proper way, with the hose run to a point of vacuum( his draw vacuum from the manifold, my starboard draws from the base of its carb.) this engine had the PCV hose connected to the flame arrestor and not very tightly( large gap). No possible way this setup provides any vacuum to the hose, let alone enough to operate the valve.
Ok next problem, my carb doesn't have a vacuum port to connect to.
My mechanic wrangled a pair of carbs from a set of engined bound for the junk heap, only issue is they are from a crusader 350's ( which is a big block), he said the only real difference is the needle valve size. which I assume we could swap from my existing carb??
These "test carbs" do not have a nipple for the fuel dump hose from the fuel pump but the do have a plug where it should go.( i can use the one from my carb)
Our next step is to get the PCV system operational. in the hopes that the excessive crank case pressure caused by a non functional PCV system is causing the leak.
I've read from several sourced that a bad PCV system can cause oil leaks much like the one i'm having.
Does anyone have an idea if this diagnostic makes any sense??
Greg-
seem the rear seal doesn't directly leak when the engine is running or if it is its very little. I noticed after changing the engine diapers that they stay clean until i turn the engine off, then, after a few seconds, I get a small trickle of oil out of the seal. Friday the engine was topped up with oil after a day of fishing with many starts and stops I returned to the dock a qt. low. engine diaper was soaked. So today I inspected the engine and a friend who knows a ton about 360's listened to my symptoms and asked how the PCV valve looked. I pulled it and noticed that it was not connected in the proper way, with the hose run to a point of vacuum( his draw vacuum from the manifold, my starboard draws from the base of its carb.) this engine had the PCV hose connected to the flame arrestor and not very tightly( large gap). No possible way this setup provides any vacuum to the hose, let alone enough to operate the valve.
Ok next problem, my carb doesn't have a vacuum port to connect to.
My mechanic wrangled a pair of carbs from a set of engined bound for the junk heap, only issue is they are from a crusader 350's ( which is a big block), he said the only real difference is the needle valve size. which I assume we could swap from my existing carb??
These "test carbs" do not have a nipple for the fuel dump hose from the fuel pump but the do have a plug where it should go.( i can use the one from my carb)
Our next step is to get the PCV system operational. in the hopes that the excessive crank case pressure caused by a non functional PCV system is causing the leak.
I've read from several sourced that a bad PCV system can cause oil leaks much like the one i'm having.
Does anyone have an idea if this diagnostic makes any sense??
Greg-