[micyou26]

Hey everyone! I have a 2002 Envoy SLT with 177,xxx miles, just had a tuneup, and replaced the VC gasket and intake gasket. Now it’s not leaking from those two places, but I found out a new leak from a hose on top of the engine under the cover?!
Any ideas? Thanks in advance!

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[Ravalli Surfer]

I wrote a short exposè on that KV Hose and how to clean both it and the CV side of that system.

Search my name here and you'll find that post.

I'm too uber-tired after a mega-long day fishing in Montana and I'm going to bed..... or I'd do it.

 

[micyou26]

I wrote a short exposè on that KV Hose and how to clean both if and the CV side of that system.

Search my name here and you'll find that post.

I'm too uber-tired after a mega-long day fishing in Montana and I'm going to bed..... or I'd do it.

Thank you very much for your help! I will look into it ASAP!


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[micyou26]

Did you mean this hose?


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[micyou26]

Can someone please confirm if this is the vacuum hose I’m looking for?

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[Ravalli Surfer]

I posted that it is NOT the hose you want.

 

[micyou26]

I posted that it is NOT the hose you want.

So sorry to sound like a pest, but I honestly didn’t get a notification at all about your reply...would it be too much to ask your guidance on locating the correct hose?


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[Ravalli Surfer]

Just took some pixs for you.....

 

[micyou26]

Thank you very much!


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[Ravalli Surfer]

Now... take the whole hose off - both ends - and using at least 75lb compressed air - blow air into the lower fitting... the one that "disappears" into the area where the head gasket should be. It will be a metal nipple ... maybe somewhat bent upward, IIRC.

Turn your head away when you blast the air to it - it might blow some gunk back at you.

This will clear out the actual "CV" side of the PCV system.

Afterward, you can put some Berrymans B12 Chemtool in the line before you button it back up.

Don't start the engine yet... you now have to remove all the chocolate colored slime in the air box. That is an emulsion of water and oil - and it is created by failure to adequately remove condensate (naturally occurring moisture from the atmosphere, internal combustion by-products and the air flowing into the throttle body that contains humidity, as it collects in the oil pan).

It will take a while and actually getting the engine up to normal operating temperature for a few miles to purge all the collected condensate outta your engine. It will go away. It will take a little while for it to finally be cleared and cleaned out.

You might've noticed that same chocolate emulsion inside your oil cap ... and in extreme cases, coating your dipstick. That's your sign ... you need to observe these abnormalities and investigate them before they cost money to repair.... BIG money!

It takes heat, dry air, mileage and time to clean this gunk out. You might consider a fresh oil change if you're close to due, since fresh oil won't have expended all its protective additives trying to save the bearings, cam and followers entertaining all the moisture that collected before you make this repair.

Using a "cold air induction" intake just makes this problem worse... for not just a single reason.

The air is not drawn from an out-of-the way, cleaner place - the KV side of the PCV system is totally bypassed rendering the PCV system useless and there is no clean air intake allowed into the engine to help keep it clean if moisture and blow-by gasses that form acids that attack critical bearing and rolling surfaces.

K&N Cold Air Packs are engine killers. Full stop. Don't get sucked in by them ... they damage things.

HTH .... jpv

 

[micyou26]

Thank you for the great write-up! Will follow through ASAP


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[Lowrider2004TB]

Just took some pixs for you.....

View attachment 55284

im having this same issue. I can't seem to take off the hose pictured above. Mine doesn't have a clamp, it doesn't want to move. Is there a trick?

 

[Ravalli Surfer]

I have a few versions of a tool called a "hose hook" that is a tapered shaft in various configurations the slip between the hose and the pipe. Most auto parts houses have some on their tool wall. Harbor Fright has them too and one is as good as another until you get to Snap-On, Mac or Cornwell - that's where the quality goes seriously UP.

 

[Ravalli Surfer]

Squirt something like WD-40 or Marvel Mystery Oil into the gap you open up with the hook and wiggle it around. It'll release pretty soon.

 

[MD TBlazer]

Just took some pixs for you.....

View attachment 55284

^ this hose doesnt have a standard looking PCV valve, but i did read it has an internal orifice that can get clogged up and cause problems.

 

[Ravalli Surfer]

^ this hose doesnt have a standard looking PCV valve, but i did read it has an internal orifice that can get clogged up and cause problems.

It's not a PCV valve ...... it's a metered orifice that has no moving parts. As far as plugging up .... I doubt that it can ... plug up, that is.

It INHALES through that metered hole and helps create a vacuum inside the block/crankcase so the valve cover gasket, front/rear seals, timing cover gasket or the oil pan gasket won't blow out or leak oil.

I'll post pics or vids after I start feeling better. Right now I'm nauseated and barfy feeling and am taking it easy in my robe and slippers in frontbf the woodstove.

I've got to deliver an ATV I repaired on Saturday afternoon so I've GOTTA feel better by then.

 

[MD TBlazer]

RS, seeing that the bottom end of the tube (circled is between two manifolds, is there a way - given your obvious experience - to detach it or do you advise using a vacuum from the intake end to dislodge anything blocking the orifice? Thanks

 

[Mikey71]

I have a few versions of a tool called a "hose hook" that is a tapered shaft in various configurations the slip between the hose and the pipe. Most auto parts houses have some on their tool wall. Harbor Fright has them too and one is as good as another until you get to Snap-On, Mac or Cornwell - that's where the quality goes seriously UP.

I’ve watched all your videos and read all your posts. I’ve learned a lot thank you. I’m trying to replace hose I did get it cleared out but was cracked so I’m trying to replace it my clamp is on the bottom and I just can’t seem to get it off it’s a nightmare. Fix one problem only to create a bigger one. I just don’t see how I can get anything in there to squeeze clamp. Obviously others have done it so it’s doable. I’ll keep at it any other words of advice would be appreciated. The hose is beating me and making me look bad to the neighbors. I know their watching lol

 

[Ravalli Surfer]

There's always the "Dremel Option" where you cut the clamp with a cutoff wheel ......

 

[Mikey71]

There's always the "Dremel Option" where you cut the clamp with a cutoff wheel ......

Ty I’ll be trying to get at it again this morning I certainly hope putting new on isn’t to bad. Thanks for your help.