I've read the threads here about this mod and I see a couple of conflicts.

1.
Some folks say route the hose over the master cylinder and someone suggest better it go down directly.

As I understand it, the hose should not have a low spot in its path to avoid collection in that low spot. That makes sense, but is that the purpose of routing it down directly and not over the Master cylinder?

2.
Some folks suggest terminating the hose into a trap of some sort, others suggest letting it exit to the atmosphere.

I'm leaning towards routing the hose to the back of the box and letting it go out next to the exhaust tip, but I'm not really sure why.



I don't want to cause a big uproar here, I'd just like to hear which way to go on these two issues so I do the best job I can.

By the way, I like the idea of using a high quality hose.

Thanks

 

When I put mine in I ran it over the master and zip tied the hose along the frame back to the rear axle. I did not put the trap in and had no problems this past winter. Don't forget new o-rings for the doghouse and new pipe for the air intake.

 

Hey there Idaho.. thanks for the reply. So, you zip tied it to the driver's side frame, and had it exit in front of, or behind the rear axle, on the driver's side, right?

Thanks for the reminder about o-rings and pipe.

How was your winter? We had a lot of snow and quite few bitter cold nights.

 

I made a filter using stuff from the local Home Depot. I like it so far.

Here's my setup: CCV_Mod

 

Thanks Chris.. so if I use a filter/trap of some sort, that looks like a good one.

Thanks

 

If you vent to atmosphere, you'll have no problem venting straight down behind the engine or routing the hose over the master cylinder. I've had my CCV mod for 4 years now, and it's always been routed over the master cylinder. No oil pools up in the CCV hose, it simply drains back into the valve cover. The only reason for routing the hose up and over the master cylinder is just to prevent oil from dripping on your driveway.

As for traps, be careful not to use anything that is going to restrict flow. Many people have used traps without problems.

Do not route the CCV into the exhaust. For some reason, the diesel exhaust does not create a venturi effect. Many people have tried and tested, and in every test case, the pressure to the crankcase increased with the CCV routed into the exhaust. Best bet is to stay away from that idea.

I know you weren't planning to route it to the exhaust (instead maybe exit next to the exhaust, that's perfectly fine). But I just wanted to give you a heads up in case the thought did cross your mind.

 

I just did my CCV mod and ran it to a trap similar to Chris's but stopped the hose close to the front of the fuel tank. Gave the wife a ride and her immediate response was "What that smell?" Guess I'm going to extend the hose to the back of the truck on the driver's side. Hopefully, that will help otherwise I may have to delete this mod?

Mike

 

Yeah, I like the trap. Doesn't smell too much IMO. I just built one for another member. Pretty straight forward with off the shelf parts. The pot scrubbers are a nice open media without much of a restriction threat.

 

If you test the condensed oil vapor in a CCV hose using litmus paper you'll see that it's acidic which is why you don't want it draining back into the valve cover! Also the additional restriction due to the sharp bends involved and the gravity effect in pushing the oil fumes up and over the master cylinder is like running 5 ft or so of additional straight line hose length. Also the hose runs down the outside of the frame rail where the hose is subjected to lower temperatures whereas my recommended approach is almost a straight run that keeps the hose near the engine and tranny heat and terminates at the front of the fuel tank. In cold climates where your spit can freeze before it hits the ground even a CCV hose with no low section can freeze up due to the progressive layered freezing of the condensation!

Thanks for warning against routing the CCV hose to the exhaust but let me clarify something about the use of the term "Venturi effect" which actually requires a "Venturi tube" to achieve a "Venturi effect". Here on FTE and on other forums as well both the "Bernoulli effect" and the "Venturi effect" which is a special case of the "Bernoulli effect" have been used to try and explain/justify why routing the CCV to the exhaust will provide a vacuum in the crankcase but as I explain in great detail in post #59 here... https://www.ford-trucks.com/forums/7...ml#post7122368 ...neither of these "Physics" justify routing the CCV to the exhaust!

 

Thanks for your careful and detailed reply.

So, from what I have read, I think is pretty clear that you do not terminate the hose in a filter or trap of any sort.

What has been your experience regarding the smell? Do you think extending the hose further to the rear, and perhaps closer to the exhaust tip, will help mask or avoid that smell?

Thanks

 

Yeah, that's right.. thanks..

I appreciate your helpful reply.

 

This precaution of venting straight to the atmosphere ensures that your CCV mod will cause the lowest possible increase in crankcase pressure. Remember that the OEM Ford design provides a 2" H2O to 6" H2O vacuum in the crankcase depending on engine load where the higher vacuum occurs at higher loads where it's needed to vent the increased blow by.

Well it sure stinks and my wife complained after I did the CCV mod on my F350 and my CAT C7 came stock with its crankcase vented straight down to the atmosphere and at stop lights she really complained about that so I got a 1.5" ID hose and routed my C7 CCV to behind the driver's side under the truck near the tranny.

On my F350 my special hose only comes in precut 10 ft lengths which is why I stopped by the fuel tank! The longer the CCV hose run the higher the crankcase pressure!

 

We are talking oil in the amounts of a teaspoon or two in 5000 miles. Sorry, but that tiny tiny amount of oil draining back into the crankcase is not going to have one single ounce of effect on the overall engine oil. On top of that, different oil types and brands have different amounts of oil vapors. Some never drip any oil or have hardly any visible oil vapors that can be seen.

More like 2 or 3 feet (depending on how it's routed), but I don't have any sharp turns in the routing. I'm sure if anyone makes a sharp enough turn to cause the hose to kink, they are in for some leaking oil seals in no time.

Mine actually follows a very similar path, but it does go over the master cylinder first.
Considering how often I have driven in cold weather, snow, ice, and everything else (I do live in Colorado after all), not once has my CCV ever frozen. It's clear vinyl tubing, and I have checked from time to time in really bad winter weather just to be sure. So far, nothing whatsoever.

 

Hey guys, if you are looking for a kit that does not vent to atmosphere, comes with a filter and a bypass that opens at 1 PSI and looks like a factory install... look no further. The kit is a bit more money than a do-it-yourself kit but worth it for you "green" Ford owners!

Click Image for more details

 

I have plans to re-do my CCV mod- up over the master cylinder (as it is now) but run forward and terminating near the fan. Right now it runs toward the back of the truck, and the heater hose I used is seeping oil near the valve cover. I'm going to buy some new hose and re-route it... the fan should help disperse the stink, it's a short hose run and keeping it up near the engine should help avoid issues with cold.