blowby catch can

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blowby catch can

March 17, 2015, 09:18:28 pm

what do ya think

Re: blowby catch can

Reply #1 – March 17, 2015, 09:57:43 pm

Just be careful the blowby/ slober tube, crank case vent has to be unrestricted

Re: blowby catch can

Reply #2 – March 17, 2015, 10:06:35 pm

I made ours out of one of those aluminum tubes that welding rod comes in. I just cut a hole in the cap, so the rubber hose fits "loosely" down in the hole. That way there is plenty of ventilation and no restriction, but any liquid that drips out is held in the can. Tied it to a nearby bracket with some stainless wire. Have only accumulated a few drops of liquid since I installed it 2000 miles ago. Sorry, no photos...

Re: blowby catch can

Reply #3 – March 17, 2015, 10:57:02 pm

Quote from: bbeane – March 17, 2015, 09:57:43 pm

Just be careful the blowby/ slober tube, crank case vent has to be unrestricted

Totally agree. Most crankcase breather hoses are 1" ID. You sure do not want to size it down from there or add restriction.

Re: blowby catch can

Reply #4 – March 18, 2015, 12:50:06 am

When does the crankcase breather tube start blowing out some stuff. I have noticed some emmissions coming from it in the last week, climbing from 450' for 7500' in two days. I noticed some oily residue on the toad and the back of the coach. Prior to this, nothing, ever.

After I cleaned the end of the tube off, I took a cloth bag and used a couple of cable ties to attach it to the bottom of the tube. It hangs down a couple of inches from the bottom of the tube.

I am assuming that this will catch most of the blow-by without too much restriction. Does this sound OK?

Roger

Re: blowby catch can

Reply #5 – March 18, 2015, 12:57:53 am

You are on the right track but you need larger hoses. Years ago, I had a Piper Tri-Pacer. It would get the belly dirty after a long flight so I made (not legal) a catch can with coarse steel wool inside and a quick drain on the bottom. Inlet tube went from the top almost to the bottom with the outlet tube from the bottom almost to the top. The blowby had to go through the steel wool and that separated the oil out. Attached it to an engine mount tube with a big hose clamp. Bottom stayed clean after that and every few hours, I drained it.

Pierce

Re: blowby catch can

Reply #6 – March 18, 2015, 07:19:43 am

Here's what I use. I was getting a lot of blowby when I installed it. Lately, not so much. The hose runs vertically. No loops or horizontal runs. It is a big plastic vitamin bottle sitting in a tin can. The hose only goes into the bottle about an inch. When it is time to change, take the bottle out, cap and turn it in when I get an oil change. Put in a new bottle.

Rich

Re: blowby catch can

Reply #7 – March 18, 2015, 07:58:11 am

Detroit Diesel actually makes a kit for V71 and V92 series engines. I had one on my old MCI from the factory.

TOM

Re: blowby catch can

Reply #8 – March 18, 2015, 10:59:37 am

#1 cause of excessive oil from the blow-by tube is overfilling the engine crankcase with oil.

Re: blowby catch can

Reply #9 – March 18, 2015, 11:51:15 am

Thanks, Brett. Oil level seems to be right in the middle of the safe zone and was closer to the top after the last change 4000 miles ago. This just started in the past week or so. No other leaks that I can see. No drips on the ground.

I like Rich's idea.

Roger

Re: blowby catch can

Reply #10 – March 18, 2015, 04:24:51 pm

I think Cummins also makes a kit but I seem to remember it is hundreds of $$$.

Rich

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blowby catch can

March 17, 2015, 09:18:28 pm

Re: blowby catch can

Reply #1 – March 17, 2015, 09:57:43 pm

Re: blowby catch can

Reply #2 – March 17, 2015, 10:06:35 pm

Re: blowby catch can

Reply #3 – March 17, 2015, 10:57:02 pm

Re: blowby catch can

Reply #4 – March 18, 2015, 12:50:06 am

Re: blowby catch can

Reply #5 – March 18, 2015, 12:57:53 am

Re: blowby catch can

Reply #6 – March 18, 2015, 07:19:43 am

Re: blowby catch can

Reply #7 – March 18, 2015, 07:58:11 am

Re: blowby catch can

Reply #8 – March 18, 2015, 10:59:37 am

Re: blowby catch can

Reply #9 – March 18, 2015, 11:51:15 am

Re: blowby catch can

Reply #10 – March 18, 2015, 04:24:51 pm

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