Did I mess up the ccv mod?

[jrayharder]

I installed a home made ccv catch can a couple months, 2,000 miles ago. Fairly soon thereafter I noticed a bit of oil oozing from the dipstick tube, and a streak down the oil filter. I found that one of the dog house o rings wasn't put back on properly, and after putting 2 new ones in there there's no more oil on the filter. It does continue to leak around the dipstick tube though.

I suspect from reading here that the crank case might be a bit pressurized now, if I did the ccv mod incorrectly. I used 3/4" heater hose, looped over the master cylinder down the the can I made underneath the driver door, picture attached. The incoming line is the lower one. From there it goes straight up to the intake.

I did not put anything in the can, and checking it today after 2,000 miles there isn't even a cap full of oil in it.

I'm about ready to cap the line to the intake, and let it blow out of the can for a while to see what it does. Should I fix the dipstick leak now? I'm afraid if I do and there is still pressure that something else will start to leak. Will the dipstick even leak absent pressure? Any ideas what I'm doing wrong?

[bigb]

Not sure but when you looped it over the master cyl did that make part of the hose go uphill? You might have a trap there full of oil stopping the air flow.

[jrayharder]

I installed it in the same manner that Guzzle did here in this picture from his website. I can see how oil could stay in the elbow off the doghouse. I'll pull it off and check.

[bigb]

actually that looks like it would work, any oil that didn't make it to the downhill part should just run back into the doghouse.

[losfinch]

Something about this mod (even when done correctly) has a way of affecting some trucks with motor leak issues. Seems to me that maybe these motors are super sensitive to any changing in the internal pressures and that when changes are made its not uncommon for leaks to start. You didn't happen to change to synthetic oil about the same time for the first time?

A related question I have is if the factory doghouse on top of the valve cover should ever been changed or cleaned. Can't that thing get plugged up as well?

[01f25073]

I am not trying to offend anyone, but why does anyone perform this modification anyway? What does it give you that you didn't have before? I know that International vents it to the air (where environmentalist freak out), but Ford was pretty smart to route it back to the air filter so there is no drip and/or smell. Thanks!

[jrayharder]

Originally Posted by 01f25073

I am not trying to offend anyone, but why does anyone perform this modification anyway? What does it give you that you didn't have before? I know that International vents it to the air (where environmentalist freak out), but Ford was pretty smart to route it back to the air filter so there is no drip and/or smell. Thanks!

I did this so that the oil through the vent wasn't dumped back into the system. I've heard the boots aren't rated for it.

That said, I'm about ready to set it back to stock, and fix this little leak.

[preith]

Same issue on my OBS - started oozing out the dipstick tube as well as the base at the oil pan. It's obvious this mod does create some additional crankcase pressure and for that reason alone I abandoned it and opted to vent it to the atmosphere instead. With that said no more leaks but she does smoke a fair amount now. It's a bit embarrassing, but from what I've read fairly normal. I want to tie it into the exhaust post muffler, but have read mixed reviews on that too.

[Justin@DP-Tuner]

Originally Posted by 01f25073

I am not trying to offend anyone, but why does anyone perform this modification anyway? What does it give you that you didn't have before? I know that International vents it to the air (where environmentalist freak out), but Ford was pretty smart to route it back to the air filter so there is no drip and/or smell. Thanks!

This mod is done to keep oil out of the intake system(intercooler pipes, boots, intercooler, and intake. After a while the boots will start to absorb oil. This makes a mess and causes boost leaks.

Originally Posted by jrayharder

I did this so that the oil through the vent wasn't dumped back into the system. I've heard the boots aren't rated for it.

That said, I'm about ready to set it back to stock, and fix this little leak.

Correct.

Originally Posted by preith

Same issue on my OBS - started oozing out the dipstick tube as well as the base at the oil pan. It's obvious this mod does create some additional crankcase pressure and for that reason alone I abandoned it and opted to vent it to the atmosphere instead. With that said no more leaks but she does smoke a fair amount now. It's a bit embarrassing, but from what I've read fairly normal. I want to tie it into the exhaust post muffler, but have read mixed reviews on that too.

It is normal to have a little smoke. Some trucks you notice it more than others.

Be careful routing it into the exhaust. You can actually create vacuum which creates negative pressure.

[preith]

Originally Posted by Justin@DP-Tuner

It is normal to have a little smoke. Some trucks you notice it more than others.

Be careful routing it into the exhaust. You can actually create vacuum which creates negative pressure.

The smoke is about the same as youtube vids posted which got the "all clear".

Agreed on the exhaust routing. I'd like to do this, but the problem is nobody that I know of has determined what kind of vacuum, if any, is seen at various points on the exhaust, and at what input angle. I have neither the time or inclination to do so. With that said, I'd think a small amount of negative pressure would be preferred.

[01f25073]

Thanks for all of the replies from my question "why perform this mod?" I have taken care of the problems listed therefore not needing the ccv mod. I had oil splattering under the hood 2 winters ago. I keep my engine clean so this was easy to diagnose. The plenum boots were leaking under boost and spraying oil. I researched this issue and found that there were more places (the same ones listed above) this could be happening. I took a Saturday to repair all parts. I cleaned everything and used oil resistant rtv to seal all connections. I have no boost leaks (truck has been tested) and more importantly no oil spray under the hood.

I have to ask this question, which is the best way to deal with the ccv issue? I bet this is an opinion type question but it is a question that logically comes next. Thanks for everyone's discussion input.

[Tforbes]

I followed Guzzle's method in building the catch can. Mounted behind the driver's wheel well, routed the "vent" or return back to the intake. Basically gave the oil vapor a longer path, place to catch the liquid, under hood around the hoses staying much cleaner. I am sure a small amount gets back into the intake, but not enough to worry about, and certainly much less than before.

[jrayharder]

Originally Posted by Tforbes

I followed Guzzle's method in building the catch can. Mounted behind the driver's wheel well, routed the "vent" or return back to the intake. Basically gave the oil vapor a longer path, place to catch the liquid, under hood around the hoses staying much cleaner. I am sure a small amount gets back into the intake, but not enough to worry about, and certainly much less than before.

So this is what I did, does your leak like mine does now?

[Tforbes]

Originally Posted by jrayharder

So this is what I did, does your leak like mine does now?

No. Knock on wood but no issues with any weird leaks.