Let’s take a deeper look into the catch can and the PCV system. The can is plumbed in-line between the crankcase and the intake manifold. So that brings up the next question, what is an oil catch can and how does it work? An oil catch can is a can that contains some form of baffling that captures the oil present in the vapor released from the crankcase. When the customer came to pick up the car we explained what we found, reviewed the pictures and agreed, this motor will certainly benefit from an oil catch can. We reinstalled the intake manifold, changed the oil and installed our oil catch can kit. When the build up of carbon becomes excessive, the valves are no longer able to seat properly, reducing power that robs your engine of performance and increases the amount of money you spend at the pump. This creates the needed compression when it’s time for that particular cylinder to fire. Why is this build up of crust bad? The valves are designed to seat in machined surfaces within the cylinder head. The assumption for the increased build up from 1 to 4 is due to their proximity to where the crankcase vapor enters the intake manifold. The oil in the vapor is adhering to the back side of the hot valves and subsequently, it’s being baked on forming an impressive crust for such low mileage. As we moved to cylinders 2 thru 4 though, we can see significant accumulation, the worst being cylinder 4.
HOW TO INSTALL OIL CATCH CAN 04 FX35 SERIES
The next series of pictures will show the astonishing amount of carbon accumulation we discovered on the valves beginning with cylinder 1, the furthest from where the crankcase vapor enters the manifold.Īs you can see from the pictures above, the valves for cylinder 1 are pretty clean and what we expected to see. Take note of the proximity of the ports in relation to where the line leading from the PCV valve enters the intake manifold. The seals that create the gap between the two are green and surround each intake runner. The next picture illustrates where the intake manifold mates with the cylinder head ports from the passenger side, port 1, towards the driver’s side, port 4. With the manifold removed we found the presence of oil on the head, in the gaps created by seals between the cylinder head and the intake manifold. Click on any of the pictures for a larger view. Immediately, things began to start looking ugly. It’s pretty easy and took less than 25 minutes to get out of the car. Let’s begin with the removal of the intake manifold. Let’s take a closer look at what makes up the PCV system and the path it takes back to the combustion chamber. Unfortunately, the vapor released from the crankcase contains trace amounts of oil, fuel and water. Sounds like a logical and efficient approach to the problem. Instead, the hot vapor is released from the crankcase, routed into the intake manifold and burned as part of the combustion process. For obvious reasons that we’ll go into more later, this can’t just be vented to the atmosphere. As the motors rotating assembly spins at very high RPM, a considerable amount of pressure is built up that must be relieved. When the motor is running under normal operating conditions, the oil becomes very hot. Simply put, the purpose of the PCV system is to ventilate the lower half of the motor that contains the motor’s crankshaft, connecting rods and balance shaft. OK, so what is the PCV system and why is there a need for one? PCV stands for Positive Crankcase Ventilation. With only 4462 miles on it, wait until you see what we found! The car wasn’t to be picked up until the following day so we were given the go ahead. With the car being so new, we asked if it would be OK to have a look inside at the current condition of the valves and document our findings. Recently, we had a customer bring their 2014 Mazda 3, 2.0L to us to install an oil catch can kit and to perform its very first oil change.
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