I've been researching these two mods and still don't really understand the idea of the ccv mod or the if the 6637 mod really works. Just wondering if someone could shed some light on these two mods.

 

A CCV mod is a crankcase venitlation mod. Usually running the crankcase vapors to a filter or just to atmosphere.

If to a filter then the filter traps the oil vapors but allows the air to route back to the intake.

 

So is the ccv mod something that should be done? Is it a design flaw from the factory?

 

it is not a design flaw. Been in cars for along time. Diesels more recent. Issue in diesels is you are not burning completely clean air.

air that passes through your intercooler and turbo's. The cleaner the better.

 

I've heard of the ccv mod but never the 6637 mod.

What is it? Link?

 

CCV mod has NO.. let me say that again, NO performance or notable longevity/reliability benefits. It is purely a "I think this is better" mod. The engine takes excess pressure from the crank case and vents it to the intake. This air is saturated with oil. The theory is that this oil will cause restrictions in the intercooler. It also seeps through intercooler boots (this is a known fact). The mod reroutes this air to the atmosphere, usually under the truck. This mod with not pass emissions testing. It also often causes increased crank case pressure which can cause oil leaks, even when installed correctly. It is worth noting that I have talked to people who have had intercoolers flushed after hundreds of thousands of miles, and report only small amounts of oil in the intercooler. Personally, I dont like this mod, nor do I see any reason to do it. However, it is a very cheap mod to do, and there is no real 'harm' in the mod either. So even if you do decide to do it, you wont be out too much if you dont like it. I did the mod and later removed it. Also, for reference, the T444E (the 7.3L when manufactured and used by International/Navistar) has the CCV vented to atmosphere in the same way the CCV mod would accomplish.

The 6637 mod is a replacement air filter. The filter is a large cylindrical filter. There are no hard numbers out there that I am aware of. The rated CFM of the 6637 is actually less than that of the stock paper element, however, when driving with a 6637 it is easily apparent that this does not appear to be the case and that the CFM is grossly understated. Also, filtration test information is not readily available on this filter to my knowledge, however again, it proves to be a more than sufficient filter in this dept.

 

I will generally agree with you on this. However for the 6.4 motor which I have it works. The 6.4 is a heavy boost motor. My ccv mod does comply with emissions. I use a Racor CCV4500 and reroute back to the intake.

I did this because of the oil degrading the turbo boots and I had one leaking. I could not afford for it to come off while towing.

Otherwise it would not have been worth the effort.

 

Since I have a 6.0L not a 7.3L, that explains why I haven't heard of the 6637 mod. LOL!

 

So are these mods worth doing to my 7.3 or should I go a different direction?

 

I would suggest you drop down into the 7.3 section and see what everyone does. I would tend to think not.

 

Moved to the 1999 - 2003 7.3L Powerstroke Diesel forum.

 

Ccv mod and 6637 mod
I've been researching these two mods and still don't really understand the idea of the ccv mod or the if the 6637 mod really works. Just wondering if someone could shed some light on these two mods.

 

quiet simple..as the it applies ccv is a crank case ventilation.

Gas motors do the same thing. Go out to your car, look at the valve covers. You should see the hose going from there to the intake.

It is used to trap any vapors from the crankcase and re-route back to the intake to be reburnt.

same prinicple for a diesel.

 

The main idea behind the CCV Mod is to divert the crankase vapor out to the atmosphere instead of looping it back into the intake which in turn can lead to oily plenum boots. So it's more of a 'housekeeping' mod. The 6637 works in that it provides great filtration and decent flow for a reasonable price. Stock airboxes can have a tendency to warp at the sealing edges of the filter causing contaminants to enter the intake there. The 6637 is an inexpensive and easy mod to correct that situation.