Crankcase ventilation

[Halon]

You're putting it back into the block? Interested to hear how that works as everything I've ever drained out of my catch can doesn't look like anything I'd want back in my motor.

[turbotalon1g]

Let us know how it goes with the chumpcar.

I believe summit sells a kit for cheap if something happens to that hose.

[s1ngletracker]

Originally Posted by Halon

You're putting it back into the block? Interested to hear how that works as everything I've ever drained out of my catch can doesn't look like anything I'd want back in my motor.

It comes out of your crankcase.... And our car goes approximately 750 miles between oil changes. If that.

Edit, also i think with a daily driver you get a lot of condensation because the motor gets a lot of start/stops and cooling in between. On the race car everything in the catch can was basically pure oil, because it is run for 7/14/24/25 hours at a time... so very little water actually ends up in it.

[Halon]

Yes it comes out of your crankcase, flying out of your crankcase as small airborne particals that have been mixed in with a lot of air and combustion gasses. Then it settles back down into your catchcan in an altered form as a substance that now looks more like baby barf than motor oil.

I'm no expert though, just my limited point of view and interested to see how that works out for you guys. Best of luck to ya!

[DavidPHumes]

For the record, I think Shane was right: I lifted the head.

I ordered L19s, a new PermaTorque HG and associated parts today.

[s1ngletracker]

Originally Posted by Halon

Yes it comes out of your crankcase, flying out of your crankcase as small airborne particals that have been mixed in with a lot of air and combustion gasses. Then it settles back down into your catchcan in an altered form as a substance that now looks more like baby barf than motor oil.

I'm no expert though, just my limited point of view and interested to see how that works out for you guys. Best of luck to ya!

right, but like i said, when you've been running for hours in a race, the stuff that comes out of a catch can is pretty much just oil. At least on our car it is. That stuff is going to be mixed up with oil anyway, as it blends with sloshed up oil in your crankcase.

And since we were filling our quart catch can with oil every 2 hour stint, we'd also come in and have to top off the oil every time. Another step saved, and another safety measure to ensure we don't run it too low on oil.

Lots of people do drainbacks into the block, this isn't a new or revolutionary idea. Heck, the stock setup on our honda is essentially a baffle box with drainback into the block. That is what gave me the idea to do it this way.

Anyway, sorry to get off topic, but your original issue did sound like a headgasket problem anyway.

[Goat Blower]

Yeah, there's a huge difference between a daily driver and a race car in this respect. I'd drain it back into the block for racing as well, you shouldn't get any condensation in there.

[Shane@DBPerformance]

Some of the catch cans for Subaru's have coolant running through them to keep the condensation from happening due to the drastic temp change of inside the motor vs outside.

[Halon]

Interesting, cool well hopefully that works out for you then. Good to know if I ever have a dedicated race car. My race car experience is limited so I can only speak from a street car point of view.

[Dizmm]

i've drained my catch can at the event right after a few laps. I still would not want to put that stuff back into my motor. I dont mind adding some fresh oil every 20 minutes. My car see's 3-4 laps at a crack, and is not street driven.

[C3L1CA]

I've read about a lot of the big HP Honda guys draining the catch can back into the motor without any real problems. I've also remember reading about some dsm guys draining it back into the motor through the balance shaft check hole.

I wonder if you put some sort of easy to clean fliter before it drained back into the block if it wouldn't be so bad.

[s1ngletracker]

Catch can worked phenomenally. Paul, if you want more details on how I did it, let me know.