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Catch cans have been a source of differing opinions here at the later C-version Forums for many, many years. An "Advanced search" in any will produce a lot of threads with no shortage of both pro and con replies. Just sayin'...
Catch cans have been a source of differing opinions here at the later C-version Forums for many, many years. An "Advanced search" in any will produce a lot of threads with no shortage of both pro and con replies. Just sayin'...
Where does the oil go if it is not collected? Into the exhaust?
The tube where the catch can is installed runs between an existing air/oil separator in the engine valley and the intake manifold. The crankcase gasses that pass through that tube are drawn into the cylinders during their intake strokes, burned during combustion, and passed out the exhaust. Its the red tube in the illustration.
The tube where the catch can is installed runs between an existing air/oil separator in the engine valley and the intake manifold. The crankcase gasses that pass through that tube are drawn into the cylinders during their intake strokes, burned during combustion, and passed out the exhaust. Its the red tube in the illustration.
So Yes and no to what you're saying. The oil/fuel blow by that comes from the PCV system is drawn into the intake manifold . Red line Where it is sucked into the combustion chamber. The problem is there are extremely hot intake valves in the flow path where some of the Oil/fuel mist is carbonized on the intake valve stems where it builds up over time. Which can over time build up and some can chip off and go into the combustion chamber which could score the cylinder walls or possibly do other damage. A lot of it does get burned and goes out the exhaust. a Catch Can gives the oil/gas mist some place to condense out .
Learned all this when I owned a 5th gen Camaro with e 3.2liter v6 which was a DI engine. I'd get about 2/3rds of a can of oil/gas and water in the can every 5000 miles. These are all byproduct of the combustion process . This stuff gets past the rings on the pistons.
So Yes and no to what you're saying. The oil/fuel blow by that comes from the PCV system is drawn into the intake manifold . Red line Where it is sucked into the combustion chamber. The problem is there are extremely hot intake valves in the flow path where some of the Oil/fuel mist is carbonized on the intake valve stems where it builds up over time. Which can over time build up and some can chip off and go into the combustion chamber which could score the cylinder walls or possibly do other damage. A lot of it does get burned and goes out the exhaust. a Catch Can gives the oil/gas mist some place to condense out .
Learned all this when I owned a 5th gen Camaro with e 3.2liter v6 which was a DI engine. I'd get about 2/3rds of a can of oil/gas and water in the can every 5000 miles. These are all byproduct of the combustion process . This stuff gets past the rings on the pistons.
That may have been true of earlier engines but there hasn't been significant intake valve carbon buildup on properly operating stock LT engines.
Where does the oil go if it is not collected? Into the exhaust?
Originally Posted by Andybump
The tube where the catch can is installed runs between an existing air/oil separator in the engine valley and the intake manifold. The crankcase gasses that pass through that tube are drawn into the cylinders during their intake strokes, burned during combustion, and passed out the exhaust. Its the red tube in the illustration....
Originally Posted by 1Coop61gt
So Yes and no to what you're saying. The oil/fuel blow by that comes from the PCV system is drawn into the intake manifold . Red line Where it is sucked into the combustion chamber. The problem is there are extremely hot intake valves in the flow path where some of the Oil/fuel mist is carbonized on the intake valve stems where it builds up over time. Which can over time build up and some can chip off and go into the combustion chamber which could score the cylinder walls or possibly do other damage. A lot of it does get burned and goes out the exhaust. a Catch Can gives the oil/gas mist some place to condense out .
Learned all this when I owned a 5th gen Camaro with e 3.2liter v6 which was a DI engine. I'd get about 2/3rds of a can of oil/gas and water in the can every 5000 miles. These are all byproduct of the combustion process . This stuff gets past the rings on the pistons.
I was just answering the posters question about where the stuff goes if its not collected. And what I said is accurate. I made no comment about the impact that may or may not have. That's for others that believe a catch can is necessary. What you added is the concern that motivates those who choose to add a catch can.
