What is this hose called? And what is this sludge from?
 

Hopefully someone on here can help. My husband is doing some maintaince on our 2006 H3 3.5 w/ 104k. Changed out plugs and cleaned the tb & maf sensor. When he disconnected the intake resonator , he pulled the mystery hose. We think it is the crankcase vent hose. This hose is cracked and we are in need to replace it. Is this the correct name for the hose? Secondly, can we have an auto part store cut some hose for its replacement or must it be replaced with a special hose with the same bends.
My final question is the sludge that was found in this hose. What would cause this and are there repairs that need to be done? When the hose was removed we found some nasty sludge on the valve/nipple, in the hose, and the valve/nipple leading up to the intake resonator. Any help is greatly appreciated

Another pic
 

Another pic

Hose picture
 

Hose pic

Sorry for all the grammatical errors. iPhone autocorrect

looks like what happens when oil and water/antifreeze mix

is your oil dip stick covered in the same thing?

none of the sludge is on the dipstick, oil cap or oil. Just changed oil 2 days before this maintance.

Looks like the crank case PCV hose, bit hard to see though.

Normally has some oil sludge in it as it sucks the oil mist out of the crank case into the intake and burns it up, but it is not supposed to look like that.

That looks like it has water mixed with oil causing it to go milky.

Clean everything up, wash in degreaser and replace hose, then keep an eye on it.

Yea this is the pcv hose thats under the stock collector box. The sludge looking stuff as aussie said is cause by water and oil mix. It will look like that there because air is being pulled through that hose and sometimes a little oil from the top end comes through to. Its not a big deal just if you start to see it on the dipstick and oil cap.

This also happens when the engine dosen't get to full operating temp. Short drives in the winter time this will happen.

Hi OP
The hose part# can found in this thread.
Need some help [Archive] - Club Hummer Offroad

Chris

Thanks!
 

Thanks everyone for the quick replies. The hose is called the crankcase ventilation hose. It is a special order hose. Picked mine up today at the dealership, no one else had the hose. Hose is pretty cheap ($10). Sludge is normal according to the dealership. Like the post before, we just need to clean it out. Dealership indicated that this was caused from the oil spray from the crankcase mixing with condensation in the line. Hope this can help others! I greatly appreciate all your responses and help!
Cheers!

Sludge normal ? Is the removal a scheduled maint item?

If the oil and sludge that collects in the breather hose and intake really bugs you, install one of these: PVC Oil Catch Can Silver : Amazon.com : Automotive

(there are dozens to choose from)

Well would be part of PCV pollution system maintenance.

The oil is normal, the sludge (water in the oil) might be normal in different climates, in our climate here definitely not normal, no humidity and no snow.

The I5 H3 has TWO PCV ports, the one that is apparently baffling you fellows is the secondary, it handles about 30% of the crankcase ventilation that kicks in under heavy throttle. There is a another one (8MM) that vents into the intake manifold which is the primary and handles about 70% under regular driving conditions.

It is not rocket science, rather it is a 1/2" (12MM) hose, any will do, buy a piece at the local auto parts and cut it to length, shape of the hose length is irrelevant.

Heavy throttle will pull in oil vapors, fumes and blow by with very warm air/CO, your intake is cool, the change in temps creates.... condensation. It doesn't matter if you live in a desert, still happens but to a lesser extent. The condensed moisture mixes with the oil residue, and that is what you are left with. Normal if you heavy foot it.

Actually the other one is the clean air supply from the air filter to the crankcase under normal driving.
If there is blowby,the svc lit says,it can backflow up that hose to the air filter, an abnormal condition.
Ive to make up hoses with funny/hard bends,and find it helps to get a long piece and put a loop in it to avoid a kink in the hard bend. As Doc says its just a hose,nothing special,the orfice is where it plugs on to the engine. You might want to see if the hole ,2.5 mm , is plugged while the hose is off.

What does it mean when it's on oil cap and dip stick

That's a sign of a head gasket issue. Sorry to hear that!

Many questions have to be answered first.

Are you losing coolent? Do you only drive short distances, like under 10 miles? Have you made sure your crankcase vent hose is not plugged up?

Today I was looking under the bonnet to see if there is anything irregular going on in my engine bay, and noticed that this hose was torn and oily stuff had covered it along with the part of the engine its connected to. Since its supposed to feed excess oil vapor/gasses back to the intake to burn and reduce pollution, is there something im supposed to worry about other than polluting the atmosphere?

hummer 2007 H3 engine crankcase ventilation hose located on bottom of resinator nearest back of engine.
# to be...15123628...
Chris

You'll get a code thrown in the DIC.

Chris

Blocked pvc valve inside the engine.
 

Its the crank case ventilation hose. Just below this pipe in your picture inside the engine is a type of pvc valve that is supposed to clear vent gasses from the crank case. 9 times out of ten this gets blocked with oil sludge and it sprays out this plastic Tube into the air box. Bad. So to fix it and clear the blocked sludge. Remove the rubber hose and use a air compressor and blast air down that hose hole to clear the sludge. Make sure that your oil tip stick is pulled out slightly so the engine is no pressurized and that should fix your issues. All Hummer owners need to do this. A blocked pvc internal valve can destroy an engine because it over pressurizes it. Cheers from UK

OOOooooooo, a 7 year old thread!!!!:eek:

Sludge in pvc hose
 

no you’re gonna want to order the exact hose, those special bends are very important!! The sludge is just condensation that mixed with oil, it will burn off while driving.

How about we PLEASE avoid digging up 7 year old threads to tack on the end?????? READ: Old Threads/'Necro-Bumping'

"Special Bends"...... :D


Let us all allow this dog of an Old Thread go off and die never to be brought to the front of the board again