I recently was looking at my motor, and I noticed that this black hose, looked like it was "sweating" around one end of it. In this picture, its the black hose, in the right hand side of the picture, right under the "yellow "fuel" line..What is it? what does it do, etc?? Looked like an oily residue on one end...Any thoughts??

http://shbox.com/1/pcv.jpg

 

Is it the brake booster hose(large) or the egr solenoid feed vacuum hose??
Is it full of oil??
Got alot of blow-by?

 

Its not the Brake Vacuum hose. Im not sure if its the EGR hose or not...It wouldn't really matter if it was the EGR, since it has been deleted..Also not sure whether its full or oil or not...thats why I posted about it...The whole hose itself, is about 3"-4" in total length...

 

if you are talking about the hose that has the words (pcv) valve on top of it, that IS the hose to the brake booster

 

I agree with the above post that the 'fat hose' with the 'Ventilation (PCV) valve' lettering on it, is the brake booster vacuum hose...

 

Either run all breathers or periodically clean the intake & inspect/replace oil swelled hoses.

If you run a PCV this is gonna happen no matter what, but for a street car it is a necessary evil IMHO.

Stock LT1's do this alot, along with others.....

 

Ok, on the drivers' side of the motor, right after the 2nd Injector, there are 3 different hoses coming out of the intake...The one Im talking about is the bottom hose....does this help?

 

what color is the fluid?

 

there is just an oily residue on the end of the hose....like its "sweating" or something...

 

Here's a picture of a 94. 93/94 is not the same as 95-97 (Shoebox's picture):

drivers side of 94

Ignore the red paint ( ) and the extra Opti vent connection.

The very top one, with the fat, reinforced rubber hose is the vacuum line to the brake booster.

The very bottom one, with the rubber grommet on the side of the intake, is the PCV valve.

It has a u-shaped hose that curves to the right, and reconnects to a fitting hidden by the brake booster hose.

The "middle" line is normally the line for the vacuum to the EGR valve, but I have added the vent connection to it for my Opti.

I disagree that it is inevitible that you will get oil buildup on the PCV connections. My car is 10 years old and I've never seen any buildup. If you are getting oily residue around the PCV valve grommet, the grommet may be dried out and allowing pressure to vent out fo the crankcase. Pressure may be building up, because the PCV valve is plugged, or there is excessive blowby on the rings. If you are getting pressure and residue around the PCV grommet, look at the passenger side valve cover, toward the back, where the PCV fresh air supply line inserts into the rubber grommet. You may see an oily residue there as well.

 

Ya, its the bottom hose...my hose doesn't say PCV on it, so I didnt' know...I have a little buildup on the PCV grommet and on the passenger side grommet, that inserts into the pass. side valve cover...How do I fix this?? What does this effect?? Would it be hard to start sometimes, do to lost pressure?? Thanks Fred!!

 

Shouldn't affect starting.

First, check the PCV valve. Pull it out of the grommet and shake it. If it rattles, it is OK. For insurance, spray some solvent into the valve and shake it, then drain it and put it back in. Or just buy a new one for less than $3.

Then check the line that goes from the throttle body to the passenger valve cover for oil. Then remove the throttle body cover plate and look for oil. Those lines will sometimes get a little oil in them, but it shouldn't be "heavy". If it is heavy, with the engine idleing, and all the hoses properly connected, remove the oil fill cap and hold your hand over it and feel for air "chuffing" out of the fill pipe, then put your ear down close and listen for a "chuffing" sound. That feel/sound might indicate worn rings and excessive blowby. In that case, a compression check and leak-down test would be indicated.

You might simply be having a problem with the grommets for the PCV valve and the valve cover elbow getting dry and shrinking... after all the car is now 10 years old. If the PCV valve is OK, no chuffing at the oil fill pipe, and no major oil problem with the TB, just try replacing the grommets.

 

Cool!!

I'll try that test this weekend, and post the result..Thanks again Fred!!