Can CCV bypass freeze up in cold weather?

[Max Torque]

Can the discharge end of a CCV bypass hose freeze up underneath the car when driving in winter conditions?

If this should happen, pressure would build up inside the engine and force oil through the seals, possibly doing permanent damage.

Should a tee with some sort of pressure relief be spliced into the hose near (the heat of) the engine to allow CCV flow in case of blockage at the discharge end?

Max

 

[Drivbiwire]

leave the edn of the hose unobstructed. The clow of warm air out the CCV will prevent any freezing. I only suggest using 3/4" hose this way the diameter is large enough to keep from freezing.

Make sure the hose is facing rearward relative to the direction of the car. Also cut the end so that it's at an angle.

Since 1998 I have had no freezing of the CCV lines in my TDI's.

DB

 

[VelvetFoot]

I think somebody's did freeze with those results. Why not vent above the belly pan?

 

[kiwibru]

A venting trick that has worked for me is to install a 3/4" Male/Male/Male PVC pipe "T" in the rubber hose just behind the engine but slightly below. Add a Piper X CCV by hose clamping it to the top of the PVC T. Then the remainder of the 3/4" hose drops down to the lower frame. If there is any fear of freezing it is now removed as an issue as the Piper X vent will now take the excess if freezing did become an issue.
kiwibru

 

[Craazyed]

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[ January 07, 2002: Message edited by: Craazyed ]</p>

 

[GoFaster]

I had this happen, but only because I drove through deep snow and had to rock the car back and forth, and that packed the end of the hose with snow, which subsequently froze solid after the next heat/cool cycle.

The hose now ends INSIDE the engine compartment, it's zip-tied to the shifter cables and ends well above the belly pan and in the vicinity of the nice toasty-warm turbocharger and exhaust flex pipe! But not too close, and the end is not directly above that hot stuff ... don't want to be starting any oil fires, either.

 

[Craazyed]

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[ January 07, 2002: Message edited by: Craazyed ]</p>

 

[lrpavlo]

Crazy...
think I saw your post before...glad you found the problem.
My guess is...since you caught the situation before you emptied all your oil...just a quart as I recall, you probably did no damage.
If you really want to set your mind at ease....contact Pete Baranko (Drivbiwire) and ask him to do a cylinder pressure test.

 

[GoFaster]

I drove maybe 2 blocks with it frozen. Saw the clouds of smoke behind; smelled like oil smoke when I stopped; turned back and went home (and fixed the problem).

That was last winter, and there have been no problems since.

 

[ST33LR4T]

My hose is plugged at the end with a K&N breather about half way down the hose. I oil it every month in the colder weather because as i see it oil and water dont mix so how could it freeze over the filter?

Maybe i might just learn the hard way but i havent seen any evidence that freezing has occured.

 

[Gary Pieper]

Mine froze up this morning. First time driving this year in the cold - about 0 F. I thought about going back to stock before I left this morning (after having it freeze last year), but figured it would be OK since it was just cold - no snow to drive through. WRONG!! It started to smoke within 12 miles, even though I had it routed near the warm stuff, and had a small air filter cartridge on the end of the hose. Stopped at a station and yanked the hose off of the PCV housing - releived quite a bit of pressure. Will hook back up to stock B4 going home tonite.

When this happened last year - the smoke cleared up on the way home - about 20 miles. It was already thinning out in the last 5 miles to work. No permanent damage - I hope.

Later

GP

 

[Craazyed]

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[ January 07, 2002: Message edited by: Craazyed ]</p>